iOS 判断string 是否是纯汉字

iOS 判断string  是否是纯汉字

NSString * isOk = [self isChinese:self.searchStr]?@"YES":@"NO";

isOK  如果是"YES" 则是纯汉字  反正则不是

#pragma mark  是否是纯汉字

- (BOOL)isChinese :(NSString *)str

{

NSString *match = @"(^[\u4e00-\u9fa5]+$)";

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF matches %@", match];

return [predicate evaluateWithObject:str];

}