English 中文(简体)
国家统计研究所失踪的传闻 观点分配
原标题:Missing sentinel in UIAlertView allocation
UIAlertView *alert = [[UIAlertView alloc]
    initWithTitle:@"Error"
    message:@"Some failure message"
    delegate:self 
    cancelButtonTitle:@"cancel"
    otherButtonTitles:@"retry", nil
];  
[alert show];
[alert release];

我收到两个警告,指出这套法典。

  • Unused variable alert
  • Missing sentinel in function call

我的守则与在线所有实例相似。 它为什么被打破?

最佳回答

该法典对我课以罚款。 ry清所有目标,再次弄清错误是否继续存在。

由于您打电话[alert show],你不应在alert上获得未使用的变式警报。

由于在<条码>后添加了<代码>nil,因此,你不应收到缺失的发送通知。

问题回答

暂无回答




相关问题
List Contents of Directory in a UITableView

I am trying to list the contents of Ringtones directory in a TableView, however, I am only getting the last file in the directory in ALL cells, instead of file per cell. This is my code: - (...

iPhone NSUserDefaults persistance difficulty

In my app i have a bunch of data i store in the NSUserdefaults. This information consists of an NSObject (Object1) with NSStrings and NSNumbers and also 2 instances of yet another object (Object2). ...

Writing a masked image to disk as a PNG file

Basically I m downloading images off of a webserver and then caching them to the disk, but before I do so I want to mask them. I m using the masking code everyone seems to point at which can be found ...

Resize UIImage with aspect ratio?

I m using this code to resize an image on the iPhone: CGRect screenRect = CGRectMake(0, 0, 320.0, 480.0); UIGraphicsBeginImageContext(screenRect.size); [value drawInRect:screenRect blendMode:...

Allowing interaction with a UIView under another UIView

Is there a simple way of allowing interaction with a button in a UIView that lies under another UIView - where there are no actual objects from the top UIView on top of the button? For instance, ...

热门标签