Swift中的UIAlertView，获取EXC_BAD_ACCESS [英] UIAlertView in Swift, getting EXC_BAD_ACCESS

问题描述

首先，我很清楚Xcode 6和Swift语言是Beta版本，容易出错.但是，这个特定的对象似乎有些奇怪，因为到目前为止我尝试过的所有其他方法似乎都可以正常工作.

First and foremost, I'm quite aware that Xcode 6 and the Swift language are in Beta and are prone to errors; however, this particular one seems to be something strange as everything else I've tried so far seems to work fine.

如果这不适用于StackOverflow，我将很乐意删除该问题.

If this is not appropriate for StackOverflow, I will gladly remove the question.

我已经开始使用Xcode 6/Swift(为发布做准备)，与我想的相比，这是一种非常愉快的体验.话虽如此，移植我喜欢做的训练"风格的应用程序时遇到的一个问题是，由于EXC_BAD_ACCESS所涉及的代码是

I've begin playing with Xcode 6/Swift (preparing for its release) and it has been an extraordinarily enjoyable experience compared to what I thought it would be. That being said, one issue in porting a "training" style app I like to do is that I can't seem to generated a UIAlertView due to EXC_BAD_ACCESS the code in question is:

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    var alert = UIAlertView(title: "Title", message: "Message", delegate: nil, cancelButtonTitle: "OK") // EXC_BAD_ACCESS here
    alert.show()
}

在创建UIAlertView的行上，我得到一个EXC_BAD_ACCESS，因为在已释放的实例上调用了[UIAlertView retain].

On the line that creates the UIAlertView I get an EXC_BAD_ACCESS because [UIAlertView retain] was called on a deallocated instance.

我再次将其用粉笔写到beta横幅上，但是很好奇我做错了什么，或者其他人遇到了类似的问题.

Again, I'm chalking this up to the beta banner but was curious if I was doing something wrong or if anyone else has run into similar issues.

推荐答案

尝试以下代码

let alert = UIAlertView()
alert.title = "Title"
alert.message = "My message"
alert.addButtonWithTitle("Ok")
alert.show()

但是在iOS 8中

UIAlertView已过时.因此，将UIAlertController与UIAlertControllerStyleAlert的preferredStyle一起使用.应该是:

UIAlertView is deprecated. So use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert. It should be:

var alert = UIAlertController(title: "Title", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)

检查上面的代码，是否遇到相同的错误?

Check the above code, are you getting same error or not ?

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