iOS开发 判断字符串是否包含中文、是否纯中文

iOS 中文字符判断 正则NSRegularExpression 谓词NSPredicate 和 NSRange
原文：https://www.cnblogs.com/pruple/p/7450654.html

#pragma mark - 中文字符判断

// 正则匹配是否包含中文

- (BOOL)validateContainsChinese:(NSString *)content

{

// ^[\u4e00-\u9fa5] 以中文开头 的字符串

// [\u4e00-\u9fa5] 包含中文

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;

}