网址验证(Objective-C)

Question

我试图用这种方法验证URL:

码:

- (BOOL) validateUrl: (NSString *) candidate {

    NSString *urlRegEx=
    @"((https?|ftp|gopher|telnet|file|notes|ms-help):((//)|(\\\\))+[\w\d:#@%/;$()~_?\+-=\\\.&]*)";

    NSPredicate *urlTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", urlRegEx]; 
    return [urlTest evaluateWithObject:candidate];

}

它不起作用.我认为问题在于正则表达式.

Answer 1

您可以使用+ (id)URLWithString:(NSString *)URLString方法NSURL,nil如果字符串格式错误,则返回.

使用if (URL && URL.scheme && URL.host)检查URL.

Answer 2

试试这个..

- (BOOL) validateUrl: (NSString *) candidate {
    NSString *urlRegEx =
    @"(http|https)://((\\w)*|([0-9]*)|([-|_])*)+([\\.|/]((\\w)*|([0-9]*)|([-|_])*))+";
    NSPredicate *urlTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", urlRegEx]; 
    return [urlTest evaluateWithObject:candidate];
}

它可能会帮助你.