iOS常用公共方法

港控/mmm° 2023-10-10 09:07 85阅读 0赞

###### 1. 获取磁盘总空间大小 ######

1 //磁盘总空间
     2 + (CGFloat)diskOfAllSizeMBytes{
     3     CGFloat size = 0.0;
     4     NSError *error;
     5     NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
     6     if (error) {
     7 #ifdef DEBUG
     8         NSLog(@"error: %@", error.localizedDescription);
     9 #endif
    10     }else{
    11         NSNumber *number = [dic objectForKey:NSFileSystemSize];
    12         size = [number floatValue]/1024/1024;
    13     }
    14     return size;
    15 }

###### 2. 获取磁盘可用空间大小 ######

1 //磁盘可用空间
     2 + (CGFloat)diskOfFreeSizeMBytes{
     3     CGFloat size = 0.0;
     4     NSError *error;
     5     NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
     6     if (error) {
     7 #ifdef DEBUG
     8         NSLog(@"error: %@", error.localizedDescription);
     9 #endif
    10     }else{
    11         NSNumber *number = [dic objectForKey:NSFileSystemFreeSize];
    12         size = [number floatValue]/1024/1024;
    13     }
    14     return size;
    15 }

###### 3. 获取指定路径下某个文件的大小 ######

1 //获取文件大小
    2 + (long long)fileSizeAtPath:(NSString *)filePath{
    3     NSFileManager *fileManager = [NSFileManager defaultManager];
    4     if (![fileManager fileExistsAtPath:filePath]) return 0;
    5     return [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];
    6 }

###### 4. 获取文件夹下所有文件的大小 ######

1 //获取文件夹下所有文件的大小
     2 + (long long)folderSizeAtPath:(NSString *)folderPath{
     3     NSFileManager *fileManager = [NSFileManager defaultManager];
     4     if (![fileManager fileExistsAtPath:folderPath]) return 0;
     5     NSEnumerator *filesEnumerator = [[fileManager subpathsAtPath:folderPath] objectEnumerator];
     6     NSString *fileName;
     7     long long folerSize = 0;
     8     while ((fileName = [filesEnumerator nextObject]) != nil) {
     9         NSString *filePath = [folderPath stringByAppendingPathComponent:fileName];
    10         folerSize += [self fileSizeAtPath:filePath];
    11     }
    12     return folerSize;
    13 }

###### 5. 获取字符串(或汉字)首字母 ######

1 //获取字符串(或汉字)首字母
    2 + (NSString *)firstCharacterWithString:(NSString *)string{
    3     NSMutableString *str = [NSMutableString stringWithString:string];
    4     CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
    5     CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);
    6     NSString *pingyin = [str capitalizedString];
    7     return [pingyin substringToIndex:1];
    8 }

###### 6. 将字符串数组按照元素首字母顺序进行排序分组 ######

1 //将字符串数组按照元素首字母顺序进行排序分组
     2 + (NSDictionary *)dictionaryOrderByCharacterWithOriginalArray:(NSArray *)array{
     3     if (array.count == 0) {
     4         return nil;
     5     }
     6     for (id obj in array) {
     7         if (![obj isKindOfClass:[NSString class]]) {
     8             return nil;
     9         }
    10     }
    11     UILocalizedIndexedCollation *indexedCollation = [UILocalizedIndexedCollation currentCollation];
    12     NSMutableArray *objects = [NSMutableArray arrayWithCapacity:indexedCollation.sectionTitles.count];
    13     //创建27个分组数组
    14     for (int i = 0; i < indexedCollation.sectionTitles.count; i++) {
    15         NSMutableArray *obj = [NSMutableArray array];
    16         [objects addObject:obj];
    17     }
    18     NSMutableArray *keys = [NSMutableArray arrayWithCapacity:objects.count];
    19     //按字母顺序进行分组
    20     NSInteger lastIndex = -1;
    21     for (int i = 0; i < array.count; i++) {
    22         NSInteger index = [indexedCollation sectionForObject:array[i] collationStringSelector:@selector(uppercaseString)];
    23         [[objects objectAtIndex:index] addObject:array[i]];
    24         lastIndex = index;
    25     }
    26     //去掉空数组
    27     for (int i = 0; i < objects.count; i++) {
    28         NSMutableArray *obj = objects[i];
    29         if (obj.count == 0) {
    30             [objects removeObject:obj];
    31         }
    32     }
    33     //获取索引字母
    34     for (NSMutableArray *obj in objects) {
    35         NSString *str = obj[0];
    36         NSString *key = [self firstCharacterWithString:str];
    37         [keys addObject:key];
    38     }
    39     NSMutableDictionary *dic = [NSMutableDictionary dictionary];
    40     [dic setObject:objects forKey:keys];
    41     return dic;
    42 }
    43 
    44 //获取字符串(或汉字)首字母
    45 + (NSString *)firstCharacterWithString:(NSString *)string{
    46     NSMutableString *str = [NSMutableString stringWithString:string];
    47     CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
    48     CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);
    49     NSString *pingyin = [str capitalizedString];
    50     return [pingyin substringToIndex:1];
    51 }

使用如下:

NSArray *arr = @[@"guangzhou", @"shanghai", @"北京", @"henan", @"hainan"]; NSDictionary *dic = [Utilities dictionaryOrderByCharacterWithOriginalArray:arr]; NSLog(@"\n\ndic: %@", dic);

输出结果如下:

![Image 1][]

输出结果

###### 7. 获取当前时间 ######

1 //获取当前时间
    2 //format: @"yyyy-MM-dd HH:mm:ss"、@"yyyy年MM月dd日 HH时mm分ss秒"
    3 + (NSString *)currentDateWithFormat:(NSString *)format{
    4     NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    5     [dateFormatter setDateFormat:format];
    6     return [dateFormatter stringFromDate:[NSDate date]];
    7 }

###### 8. 计算上次日期距离现在多久, 如 xx 小时前、xx 分钟前等 ######

1 /**
     2  *  计算上次日期距离现在多久
     3  *
     4  *  @param lastTime    上次日期(需要和格式对应)
     5  *  @param format1     上次日期格式
     6  *  @param currentTime 最近日期(需要和格式对应)
     7  *  @param format2     最近日期格式
     8  *
     9  *  @return xx分钟前、xx小时前、xx天前
    10  */
    11 + (NSString *)timeIntervalFromLastTime:(NSString *)lastTime
    12                         lastTimeFormat:(NSString *)format1
    13                          ToCurrentTime:(NSString *)currentTime
    14                      currentTimeFormat:(NSString *)format2{
    15     //上次时间
    16     NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc]init];
    17     dateFormatter1.dateFormat = format1;
    18     NSDate *lastDate = [dateFormatter1 dateFromString:lastTime];
    19     //当前时间
    20     NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc]init];
    21     dateFormatter2.dateFormat = format2;
    22     NSDate *currentDate = [dateFormatter2 dateFromString:currentTime];
    23     return [Utilities timeIntervalFromLastTime:lastDate ToCurrentTime:currentDate];
    24 }
    25 
    26 + (NSString *)timeIntervalFromLastTime:(NSDate *)lastTime ToCurrentTime:(NSDate *)currentTime{
    27     NSTimeZone *timeZone = [NSTimeZone systemTimeZone];
    28     //上次时间
    29     NSDate *lastDate = [lastTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:lastTime]];
    30     //当前时间
    31     NSDate *currentDate = [currentTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:currentTime]];
    32     //时间间隔
    33     NSInteger intevalTime = [currentDate timeIntervalSinceReferenceDate] - [lastDate timeIntervalSinceReferenceDate];
    34 
    35     //秒、分、小时、天、月、年
    36     NSInteger minutes = intevalTime / 60;
    37     NSInteger hours = intevalTime / 60 / 60;
    38     NSInteger day = intevalTime / 60 / 60 / 24;
    39     NSInteger month = intevalTime / 60 / 60 / 24 / 30;
    40     NSInteger yers = intevalTime / 60 / 60 / 24 / 365;
    41 
    42     if (minutes <= 10) {
    43         return  @"刚刚";
    44     }else if (minutes < 60){
    45         return [NSString stringWithFormat: @"%ld分钟前",(long)minutes];
    46     }else if (hours < 24){
    47         return [NSString stringWithFormat: @"%ld小时前",(long)hours];
    48     }else if (day < 30){
    49         return [NSString stringWithFormat: @"%ld天前",(long)day];
    50     }else if (month < 12){
    51         NSDateFormatter * df =[[NSDateFormatter alloc]init];
    52         df.dateFormat = @"M月d日";
    53         NSString * time = [df stringFromDate:lastDate];
    54         return time;
    55     }else if (yers >= 1){
    56         NSDateFormatter * df =[[NSDateFormatter alloc]init];
    57         df.dateFormat = @"yyyy年M月d日";
    58         NSString * time = [df stringFromDate:lastDate];
    59         return time;
    60     }
    61     return @"";
    62 }

使用如下:

NSLog(@"\n\nresult: %@", [Utilities timeIntervalFromLastTime:@"2015年12月8日 15:50" lastTimeFormat:@"yyyy年MM月dd日 HH:mm" ToCurrentTime:@"2015/12/08 16:12" currentTimeFormat:@"yyyy/MM/dd HH:mm"]);

输出结果如下:

![Image 1][]

输出结果

###### 9. 判断手机号码格式是否正确 ######

1 //判断手机号码格式是否正确
     2 + (BOOL)valiMobile:(NSString *)mobile{
     3     mobile = [mobile stringByReplacingOccurrencesOfString:@" " withString:@""];
     4     if (mobile.length != 11)
     5     {
     6         return NO;
     7     }else{
     8         /**
     9          * 移动号段正则表达式
    10          */
    11         NSString *CM_NUM = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))\\d{8}|(1705)\\d{7}$";
    12         /**
    13          * 联通号段正则表达式
    14          */
    15         NSString *CU_NUM = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))\\d{8}|(1709)\\d{7}$";
    16         /**
    17          * 电信号段正则表达式
    18          */
    19         NSString *CT_NUM = @"^((133)|(153)|(177)|(18[0,1,9]))\\d{8}$";
    20         NSPredicate *pred1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM_NUM];
    21         BOOL isMatch1 = [pred1 evaluateWithObject:mobile];
    22         NSPredicate *pred2 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU_NUM];
    23         BOOL isMatch2 = [pred2 evaluateWithObject:mobile];
    24         NSPredicate *pred3 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT_NUM];
    25         BOOL isMatch3 = [pred3 evaluateWithObject:mobile];
    26 
    27         if (isMatch1 || isMatch2 || isMatch3) {
    28             return YES;
    29         }else{
    30             return NO;
    31         }
    32     }
    33 }

###### 10. 判断邮箱格式是否正确 ######

1 //利用正则表达式验证
    2 + (BOOL)isAvailableEmail:(NSString *)email {
    3     NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    4     NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    5     return [emailTest evaluateWithObject:email];
    6 }

###### 11. 将十六进制颜色转换为 UIColor 对象 ######

1 //将十六进制颜色转换为 UIColor 对象
     2 + (UIColor *)colorWithHexString:(NSString *)color{
     3     NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
     4     // String should be 6 or 8 characters
     5     if ([cString length] < 6) {
     6         return [UIColor clearColor];
     7     }
     8     // strip "0X" or "#" if it appears
     9     if ([cString hasPrefix:@"0X"])
    10         cString = [cString substringFromIndex:2];
    11     if ([cString hasPrefix:@"#"])
    12         cString = [cString substringFromIndex:1];
    13     if ([cString length] != 6)
    14         return [UIColor clearColor];
    15     // Separate into r, g, b substrings
    16     NSRange range;
    17     range.location = 0;
    18     range.length = 2;
    19     //r
    20     NSString *rString = [cString substringWithRange:range];
    21     //g
    22     range.location = 2;
    23     NSString *gString = [cString substringWithRange:range];
    24     //b
    25     range.location = 4;
    26     NSString *bString = [cString substringWithRange:range];
    27     // Scan values
    28     unsigned int r, g, b;
    29     [[NSScanner scannerWithString:rString] scanHexInt:&r];
    30     [[NSScanner scannerWithString:gString] scanHexInt:&g];
    31     [[NSScanner scannerWithString:bString] scanHexInt:&b];
    32     return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
    33 }

###### 12. 对图片进行滤镜处理 ######

1 #pragma mark - 对图片进行滤镜处理
     2 // 怀旧 --> CIPhotoEffectInstant                         单色 --> CIPhotoEffectMono
     3 // 黑白 --> CIPhotoEffectNoir                            褪色 --> CIPhotoEffectFade
     4 // 色调 --> CIPhotoEffectTonal                           冲印 --> CIPhotoEffectProcess
     5 // 岁月 --> CIPhotoEffectTransfer                        铬黄 --> CIPhotoEffectChrome
     6 // CILinearToSRGBToneCurve, CISRGBToneCurveToLinear, CIGaussianBlur, CIBoxBlur, CIDiscBlur, CISepiaTone, CIDepthOfField
     7 + (UIImage *)filterWithOriginalImage:(UIImage *)image filterName:(NSString *)name{
     8     CIContext *context = [CIContext contextWithOptions:nil];
     9     CIImage *inputImage = [[CIImage alloc] initWithImage:image];
    10     CIFilter *filter = [CIFilter filterWithName:name];
    11     [filter setValue:inputImage forKey:kCIInputImageKey];
    12     CIImage *result = [filter valueForKey:kCIOutputImageKey];
    13     CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
    14     UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
    15     CGImageRelease(cgImage);
    16     return resultImage;
    17 }

###### 13. 对图片进行模糊处理 ######

1 #pragma mark - 对图片进行模糊处理
     2 // CIGaussianBlur ---> 高斯模糊
     3 // CIBoxBlur      ---> 均值模糊(Available in iOS 9.0 and later)
     4 // CIDiscBlur     ---> 环形卷积模糊(Available in iOS 9.0 and later)
     5 // CIMedianFilter ---> 中值模糊, 用于消除图像噪点, 无需设置radius(Available in iOS 9.0 and later)
     6 // CIMotionBlur   ---> 运动模糊, 用于模拟相机移动拍摄时的扫尾效果(Available in iOS 9.0 and later)
     7 + (UIImage *)blurWithOriginalImage:(UIImage *)image blurName:(NSString *)name radius:(NSInteger)radius{
     8     CIContext *context = [CIContext contextWithOptions:nil];
     9     CIImage *inputImage = [[CIImage alloc] initWithImage:image];
    10     CIFilter *filter;
    11     if (name.length != 0) {
    12         filter = [CIFilter filterWithName:name];
    13         [filter setValue:inputImage forKey:kCIInputImageKey];
    14         if (![name isEqualToString:@"CIMedianFilter"]) {
    15             [filter setValue:@(radius) forKey:@"inputRadius"];
    16         }
    17         CIImage *result = [filter valueForKey:kCIOutputImageKey];
    18         CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
    19         UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
    20         CGImageRelease(cgImage);
    21         return resultImage;
    22     }else{
    23         return nil;
    24     }
    25 }

###### 14. 调整图片饱和度、亮度、对比度 ######

1 /**
     2  *  调整图片饱和度, 亮度, 对比度
     3  *
     4  *  @param image      目标图片
     5  *  @param saturation 饱和度
     6  *  @param brightness 亮度: -1.0 ~ 1.0
     7  *  @param contrast   对比度
     8  *
     9  */
    10 + (UIImage *)colorControlsWithOriginalImage:(UIImage *)image
    11                                  saturation:(CGFloat)saturation
    12                                  brightness:(CGFloat)brightness
    13                                    contrast:(CGFloat)contrast{
    14     CIContext *context = [CIContext contextWithOptions:nil];
    15     CIImage *inputImage = [[CIImage alloc] initWithImage:image];
    16     CIFilter *filter = [CIFilter filterWithName:@"CIColorControls"];
    17     [filter setValue:inputImage forKey:kCIInputImageKey];
    18 
    19     [filter setValue:@(saturation) forKey:@"inputSaturation"];
    20     [filter setValue:@(brightness) forKey:@"inputBrightness"];
    21     [filter setValue:@(contrast) forKey:@"inputContrast"];
    22 
    23     CIImage *result = [filter valueForKey:kCIOutputImageKey];
    24     CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
    25     UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
    26     CGImageRelease(cgImage);
    27     return resultImage;
    28 }

###### 15. 创建一张实时模糊效果 View (毛玻璃效果) ######

1 //Avilable in iOS 8.0 and later
    2 + (UIVisualEffectView *)effectViewWithFrame:(CGRect)frame{
    3     UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
    4     UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];
    5     effectView.frame = frame;
    6     return effectView;
    7 }

###### 16. 全屏截图 ######

1 //全屏截图
    2 + (UIImage *)shotScreen{
    3     UIWindow *window = [UIApplication sharedApplication].keyWindow;
    4     UIGraphicsBeginImageContext(window.bounds.size);
    5     [window.layer renderInContext:UIGraphicsGetCurrentContext()];
    6     UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    7     UIGraphicsEndImageContext();
    8     return image;
    9 }

###### 17. 截取一张 view 生成图片 ######

1 //截取view生成一张图片
    2 + (UIImage *)shotWithView:(UIView *)view{
    3     UIGraphicsBeginImageContext(view.bounds.size);
    4     [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    5     UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    6     UIGraphicsEndImageContext();
    7     return image;
    8 }

###### 18. 截取view中某个区域生成一张图片 ######

1 //截取view中某个区域生成一张图片
     2 + (UIImage *)shotWithView:(UIView *)view scope:(CGRect)scope{
     3     CGImageRef imageRef = CGImageCreateWithImageInRect([self shotWithView:view].CGImage, scope);
     4     UIGraphicsBeginImageContext(scope.size);
     5     CGContextRef context = UIGraphicsGetCurrentContext();
     6     CGRect rect = CGRectMake(0, 0, scope.size.width, scope.size.height);
     7     CGContextTranslateCTM(context, 0, rect.size.height);//下移
     8     CGContextScaleCTM(context, 1.0f, -1.0f);//上翻
     9     CGContextDrawImage(context, rect, imageRef);
    10     UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    11     UIGraphicsEndImageContext();
    12     CGImageRelease(imageRef);
    13     CGContextRelease(context);
    14     return image;
    15 }

###### 19. 压缩图片到指定尺寸大小 ######

1 //压缩图片到指定尺寸大小
    2 + (UIImage *)compressOriginalImage:(UIImage *)image toSize:(CGSize)size{
    3     UIImage *resultImage = image;
    4     UIGraphicsBeginImageContext(size);
    5     [resultImage drawInRect:CGRectMake(0, 0, size.width, size.height)];
    6     UIGraphicsEndImageContext();
    7     return resultImage;
    8 }

###### 20. 压缩图片到指定文件大小 ######

1 //压缩图片到指定文件大小
     2 + (NSData *)compressOriginalImage:(UIImage *)image toMaxDataSizeKBytes:(CGFloat)size{
     3     NSData *data = UIImageJPEGRepresentation(image, 1.0);
     4     CGFloat dataKBytes = data.length/1000.0;
     5     CGFloat maxQuality = 0.9f;
     6     CGFloat lastData = dataKBytes;
     7     while (dataKBytes > size && maxQuality > 0.01f) {
     8         maxQuality = maxQuality - 0.01f;
     9         data = UIImageJPEGRepresentation(image, maxQuality);
    10         dataKBytes = data.length/1000.0;
    11         if (lastData == dataKBytes) {
    12             break;
    13         }else{
    14             lastData = dataKBytes;
    15         }
    16     }
    17     return data;
    18 }

###### 21. 获取设备 IP 地址 ######

1 需要先引入下头文件:
     2 
     3 #import <ifaddrs.h>
     4 #import <arpa/inet.h>
     5 代码:
     6 
     7 //获取设备 IP 地址
     8 + (NSString *)getIPAddress {
     9     NSString *address = @"error";
    10     struct ifaddrs *interfaces = NULL;
    11     struct ifaddrs *temp_addr = NULL;
    12     int success = 0;
    13     success = getifaddrs(&interfaces);
    14     if (success == 0) {
    15         temp_addr = interfaces;
    16         while(temp_addr != NULL) {
    17             if(temp_addr->ifa_addr->sa_family == AF_INET) {
    18                 if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
    19                     address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
    20                 }
    21             }
    22             temp_addr = temp_addr->ifa_next;
    23         }
    24     }
    25     freeifaddrs(interfaces);
    26     return address;
    27 }

###### 22. 判断字符串中是否含有空格 ######

1 + (BOOL)isHaveSpaceInString:(NSString *)string{
    2     NSRange _range = [string rangeOfString:@" "];
    3     if (_range.location != NSNotFound) {
    4         return YES;
    5     }else {
    6         return NO;
    7     }
    8 }

###### 23. 判断字符串中是否含有某个字符串 ######

1 + (BOOL)isHaveString:(NSString *)string1 InString:(NSString *)string2{
    2     NSRange _range = [string2 rangeOfString:string1];
    3     if (_range.location != NSNotFound) {
    4         return YES;
    5     }else {
    6         return NO;
    7     }
    8 }

###### 24. 判断字符串中是否含有中文 ######

1 + (BOOL)isHaveChineseInString:(NSString *)string{
    2     for(NSInteger i = 0; i < [string length]; i++){
    3         int a = [string characterAtIndex:i];
    4         if (a > 0x4e00 && a < 0x9fff) {
    5             return YES;
    6         }
    7     }
    8     return NO;
    9 }

###### 25. 判断字符串是否全部为数字 ######

1 + (BOOL)isAllNum:(NSString *)string{
     2     unichar c;
     3     for (int i=0; i<string.length; i++) {
     4         c=[string characterAtIndex:i];
     5         if (!isdigit(c)) {
     6             return NO;
     7         }
     8     }
     9     return YES;
    10 }

###### 26. 绘制虚线 ######

1 /*
     2   ** lineFrame:     虚线的 frame
     3   ** length:        虚线中短线的宽度
     4   ** spacing:       虚线中短线之间的间距
     5   ** color:         虚线中短线的颜色
     6 */
     7 + (UIView *)createDashedLineWithFrame:(CGRect)lineFrame
     8                            lineLength:(int)length
     9                           lineSpacing:(int)spacing
    10                             lineColor:(UIColor *)color{
    11     UIView *dashedLine = [[UIView alloc] initWithFrame:lineFrame];
    12     dashedLine.backgroundColor = [UIColor clearColor];
    13     CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    14     [shapeLayer setBounds:dashedLine.bounds];
    15     [shapeLayer setPosition:CGPointMake(CGRectGetWidth(dashedLine.frame) / 2, CGRectGetHeight(dashedLine.frame))];
    16     [shapeLayer setFillColor:[UIColor clearColor].CGColor];
    17     [shapeLayer setStrokeColor:color.CGColor];
    18     [shapeLayer setLineWidth:CGRectGetHeight(dashedLine.frame)];
    19     [shapeLayer setLineJoin:kCALineJoinRound];
    20     [shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:length], [NSNumber numberWithInt:spacing], nil]];
    21     CGMutablePathRef path = CGPathCreateMutable();
    22     CGPathMoveToPoint(path, NULL, 0, 0);
    23     CGPathAddLineToPoint(path, NULL, CGRectGetWidth(dashedLine.frame), 0);
    24     [shapeLayer setPath:path];
    25     CGPathRelease(path);
    26     [dashedLine.layer addSublayer:shapeLayer];
    27     return dashedLine;
    28 }

###### 27. 将字典对象转换为 JSON 字符串 ######

1 + (NSString *)jsonPrettyStringEncoded:(NSDictionary *)dictionary{
     2     if ([NSJSONSerialization isValidJSONObject:dictionary ]) {
     3         NSError *error;
     4         NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dictionary options:NSJSONWritingPrettyPrinted error:&error];
     5         if (!error) {
     6             NSString *json = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
     7             return json;
     8         }
     9     }
    10     return nil;
    11 }

###### 28.将数组对象转换为 JSON 字符串 ######

1 + (NSString *)jsonPrettyStringEncoded:(NSArray *)array{
     2     if ([NSJSONSerialization isValidJSONObject:array]) {
     3         NSError *error;
     4         NSData *jsonData = [NSJSONSerialization dataWithJSONObject:array options:NSJSONWritingPrettyPrinted error:&error];
     5         if (!error) {
     6             NSString *json = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
     7             return json;
     8         }
     9     }
    10     return nil;
    11 }

###### 29. 获取 WiFi 信息 ######

1 需要引入头文件:
     2 
     3 #import <SystemConfiguration/CaptiveNetwork.h>
     4 代码:
     5 
     6 //获取 WiFi 信息
     7 - (NSDictionary *)fetchSSIDInfo {
     8     NSArray *ifs = (__bridge_transfer NSArray *)CNCopySupportedInterfaces();
     9     if (!ifs) {
    10         return nil;
    11     }
    12     NSDictionary *info = nil;
    13     for (NSString *ifnam in ifs) {
    14         info = (__bridge_transfer NSDictionary *)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
    15         if (info && [info count]) { break; }
    16     }
    17     return info;
    18 }

###### 30. 获取广播地址、本机地址、子网掩码、端口信息 ######

1 需要引入头文件:
     2 
     3 p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Menlo; color: #ff4647}span.s1 {font-variant-ligatures: no-common-ligatures; color: #eb905a}span.s2 {font-variant-ligatures: no-common-ligatures}
     4 
     5 #import <ifaddrs.h>
     6 #import <arpa/inet.h>
     7 //获取广播地址、本机地址、子网掩码、端口信息
     8 - (NSMutableDictionary *)getLocalInfoForCurrentWiFi {
     9     NSMutableDictionary *dict = [NSMutableDictionary dictionary];
    10     struct ifaddrs *interfaces = NULL;
    11     struct ifaddrs *temp_addr = NULL;
    12     int success = 0;
    13     // retrieve the current interfaces - returns 0 on success
    14     success = getifaddrs(&interfaces);
    15     if (success == 0) {
    16         // Loop through linked list of interfaces
    17         temp_addr = interfaces;
    18         //*/
    19         while(temp_addr != NULL) {
    20             if(temp_addr->ifa_addr->sa_family == AF_INET) {
    21                 // Check if interface is en0 which is the wifi connection on the iPhone
    22                 if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
    23                     //广播地址
    24                     NSString *broadcast = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_dstaddr)->sin_addr)];
    25                     if (broadcast) {
    26                         [dict setObject:broadcast forKey:@"broadcast"];
    27                     }
    28 //                    NSLog(@"broadcast address--%@",broadcast);
    29                     //本机地址
    30                     NSString *localIp = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
    31                     if (localIp) {
    32                         [dict setObject:localIp forKey:@"localIp"];
    33                     }
    34 //                    NSLog(@"local device ip--%@",localIp);
    35                     //子网掩码地址
    36                     NSString *netmask = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)];
    37                     if (netmask) {
    38                         [dict setObject:netmask forKey:@"netmask"];
    39                     }
    40 //                    NSLog(@"netmask--%@",netmask);
    41                     //--en0 端口地址
    42                     NSString *interface = [NSString stringWithUTF8String:temp_addr->ifa_name];
    43                     if (interface) {
    44                         [dict setObject:interface forKey:@"interface"];
    45                     }
    46 //                    NSLog(@"interface--%@",interface);
    47                     return dict;
    48                 }
    49             }
    50             temp_addr = temp_addr->ifa_next;
    51         }
    52     }
    53     // Free memory
    54     freeifaddrs(interfaces);
    55     return dict;
    56 }

作者：jianshu\_wl  
链接：http://www.jianshu.com/p/997f96d2a0b5  
來源：简书  
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

转载于:https://www.cnblogs.com/SUPER-F/p/7297982.html

[Image 1]: