Objective-C 警报 .. 不起作用？
由于某种原因我的警报不起作用？ 如果我使用 NSLog(@" %@ ", url) 没问题...但这里没有警报：
- (void)alertURL:(NSURL *)url {
UIAlertView *someError = [[UIAlertView alloc] initWithTitle: url message: @"Error sending your info to the server" delegate: self cancelButtonTitle: @"Ok" otherButtonTitles: nil];
[someError show];
[someError release];
}
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
[self alertURL:url];
return YES;
}
有人能指出我出了什么问题吗:(
For some reason my alert is not working?
If i use NSLog(@" %@ ", url) its fine... but no alert here:
- (void)alertURL:(NSURL *)url {
UIAlertView *someError = [[UIAlertView alloc] initWithTitle: url message: @"Error sending your info to the server" delegate: self cancelButtonTitle: @"Ok" otherButtonTitles: nil];
[someError show];
[someError release];
}
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
[self alertURL:url];
return YES;
}
Could anyone point out to me whats going wrong :(
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您将 NSURL 对象作为标题参数传递给 UIAlertView 初始值设定项。
title参数需要一个NSString，但您显然没有传递给它。您需要改为调用
[ url AbsoluteString ]或[ urlrelativeString ]。You are passing the NSURL object as the title argument to the UIAlertView initializer.
The
titleargument expects anNSStringwhich you clearly are not passing to it.You need to call
[ url absoluteString ]or[ url relativeString ]instead.