iOS 7.1 应用程序在显示警报视图时崩溃

Question

I have used alertview many times but currently i have an issue. My app is working in all the version except it is crashing in iOS 7.1. Below is the log message.

[_UIBarBackgroundCustomImageContainer image]: message sent to deallocated instance 0x13b88840

 UIAlertView *alert  =   [[UIAlertView alloc]initWithTitle:@"Title" @"Test" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
 [alert show];

I don't understand why it is only crashing in iOS 7.1

Answer 1

Are you sure to be on main thread ?

You can test it like this : [NSThread isMainThread];

Answer 2

As requested by the OP I have just moved my comments to be an answer.

There are a few issues wrong with the following line:

[[UIAlertView alloc]initWithTitle:@"TestTitle" @"Test" delegate:self cancelButtonTitle:kActionOk otherButtonTitles:nil, nil];

just replace it with

[[UIAlertView alloc]initWithTitle:@"TestTitle" message:@"Test" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

As for what the issues are with that line, they are:

1) The method initWithTitle:delegate:cancelButtonTitle:otherButtonTitles: isn't a real instance method for UIAlertView so it shouldn't work in any iOS where as you have said it does work in iOS versions prior to 7. The method that you should be using is initWithTitle:message:delegate:cancelButtonTitle:otherButtonTitles: notice the extra parameter message: this is the main issue and should create a compiler error and if it got passed that should throw a runtime error of unrecognised selector .

2) The second is is that you have two nil s being passed in for the last parameter for otherButtonTitle: , this parameter is nil terminated so as soon as it sees nil it will end what can be passed into that parameter so the second nil is pointless and never seen. This also may create a compiler error but would be in the shadows of the first issue (1)

For more information in regards to UIAlertView please the Apple Documentation on UIAlertView