如何在iPhone上验证网址 [英] How to validate an url on the iPhone

问题描述

在我正在开发的iPhone应用中，有一个设置，您可以输入网址，因为形式&功能此URL需要在线和离线验证。

In an iPhone app I am developing, there is a setting in which you can enter a URL, because of form & function this URL needs to be validated online as well as offline.

到目前为止，我还没有找到任何验证网址的方法，所以问题是;

So far I haven't been able to find any method to validate the url, so the question is;

如何在线和离线验证iPhone（Objective-C）上的URL输入？

How do I validate an URL input on the iPhone (Objective-C) online as well as offline?

推荐答案

感谢发布，您可以避免使用RegexKit。
这是我的解决方案（适用于iOS> 3.0的iphone开发）：

Thanks to this post, you can avoid using RegexKit. Here is my solution (works for iphone development with iOS > 3.0) :

- (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];
}

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