iOS 中文字符判断 正则NSRegularExpression 谓词NSPredicate 和 NSRange

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#pragma mark - 中文字符判断


// 正则匹配是否包含中文
- (BOOL)validateContainsChinese:(NSString *)content
{
    NSRegularExpression *regularexpression = [[NSRegularExpression alloc]
                                              initWithPattern:@"^[u4e00-u9fa5]"
                                              options:NSRegularExpressionCaseInsensitive
                                              error:nil];
    return ([regularexpression numberOfMatchesInString:content
                                               options:NSMatchingReportProgress
                                               range:NSMakeRange(0, content.length)] > 0);
}

// 谓词匹配是否为全中文
- (BOOL)validateAllChinese:(NSString *)content
{
    NSString *regEx = @"^[u4e00-u9fa5]+$";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regEx];
    
    return [predicate evaluateWithObject:content];
}

// 谓词匹配包含中文
- (BOOL)validateContainsChineseT:(NSString *)content
{
    NSString *regEx = @".+[u4e00-u9fa5].+";  // @"^[u4e00-u9fa5].*" - ^为匹配中文开始
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regEx];
    
    return [predicate evaluateWithObject:content];
}

// 匹配包含中文：利用rangeOfString:option:直接查找
- (BOOL)validateRangeContainsChinese:(NSString *)content
{
    NSString *regEx = @".*[u4e00-u9fa5].*";
    NSRange range = [content rangeOfString:regEx options:NSRegularExpressionSearch];
    
    return range.length;
    
}

// 匹配全是中文：利用rangeOfString:option:直接查找
- (BOOL)validateRangeAllChinese:(NSString *)content
{
    NSString *regEx = @"^[u4e00-u9fa5]+S";
    NSRange range = [content rangeOfString:regEx options:NSRegularExpressionSearch];
    
    return range.length;
    
}