ios有关字符串的工具类

短命女 2022-06-10 12:08 267阅读 0赞

/**
     *  去掉中文字符
     */
    +(NSString *)removedChinese:(NSString *)string
    {
        if (string == nil || [string isEqual:@""])
        {
            return nil;
        }
        for (int i=0; i<[string length]; i++)
        {
            char a = [string characterAtIndex:i];
            if ([self isChinese_C:a])
            {
                string = [string substringFromIndex:i];
            }
        }
        return string;
    }
    
    /**
     *  字符串是否是中文
     */
    +(BOOL)isChinese:(NSString *)str
    {
        NSString *match = @"(^[\u4e00-\u9fa5]+$)";
        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF matches %@", match];
        return [predicate evaluateWithObject:str];
    }
    
    /**
     *  中文转拼音
     */
    +(NSString *)ChineseToPinyin:(NSString *)chinese {
        NSMutableString *pinyin = [chinese mutableCopy];
        CFStringTransform((__bridge CFMutableStringRef)pinyin, NULL, kCFStringTransformMandarinLatin, NO);
        CFStringTransform((__bridge CFMutableStringRef)pinyin, NULL, kCFStringTransformStripCombiningMarks, NO);
        pinyin = (NSMutableString *)[pinyin stringByReplacingOccurrencesOfString:@" " withString:@""];
        return pinyin;
    }
    
    /**
     *  字符是否是中文
     */
    +(BOOL)isChinese_C:(char)c
    {
        NSString *match = @"(^[\u4e00-\u9fa5]+$)";
        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF matches %@", match];
        return [predicate evaluateWithObject:[NSString stringWithFormat:@"%c",c]];
    }
    
    /**
     *  字符串是否是数字
     *
     */
    +(BOOL)isNumber:(NSString *)str {
        if (!str) {
            return NO;
        }
        NSString *regex = @"^\\-?[0-9]+(\\.[0-9]+)?$";
        NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
        if ([pred evaluateWithObject:str]) {
            return YES;
        }
        return NO;
    }

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