随机网站按钮 [英] Random websites button

问题描述

这个很简单我想但是我找不到适合我的问题的答案。
我想制作一个按钮，从我给他的列表中打开一个随机URL，比方说 - 谷歌，youtube和facebook就是这个例子。
这是我的代码行，现在只连接到谷歌......：

this one is pretty simple I guess but I just can't find the answer that would suit perfectly for my issue. I want to make a button that opens a random URL from a list I'll give him, let's say - google, youtube and facebook just for the example. This is my line of code that connects now only to google...:

- (IBAction)site:(id)sender {
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://google.com"]];
}

有人可以告诉我添加到代码中的内容，以便随机选择这些其他网站也是？

Can someone please advise me what to add to the code so it will randomly pick these other websites as well?

推荐答案

像Popeye所说，你可以将URL存储到 NSArray 并随机选择其中一个：

Like Popeye said, you can store the URLs into a NSArray and pick one of them randomly:

#include <stdlib.h>

- (IBAction)site:(id)sender {
    NSArray *urls = @[
        [NSURL URLWithString:@"http://www.google.com"],
        [NSURL URLWithString:@"http://www.facebook.com"],
        [NSURL URLWithString:@"http://www.twitter.com"]
    ];

    int index = arc4random_uniform(urls.count);
    NSURL *randomURL = urls[index];

    if ([[UIApplication sharedApplication] canOpenURL:randomURL])
        [[UIApplication sharedApplication] openURL:randomURL];
}

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