【iOS 知识汇】判断一串字符串是否都是汉字

/// 判断一串字符串是否都是汉字

- (BOOL)isAllCheniseWithString:(NSString *)string{

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

    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];

    return [pred evaluateWithObject:string];

}