AlertView正在运行但未显示didReceiveRemoteNotification

Question

使用调试器我确保调用了[alertView show];，但是对话框是不可见的，我需要做些什么才能让它显示出来？

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    if( [[userInfo objectForKey:@"aps"] objectForKey:@"alert"] != NULL)
    {
        NSString *msg = [[userInfo objectForKey:@"aps"] objectForKey:@"alert"];
        if(msg != nil) {
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Usage Alert"
            message:msg  delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Ok", nil];
            [alertView show];
        }
    }
}

Answer 1

在你的视图控制器.h文件中，你需要声明<UIAlertViewDelegate>这样，在开始花括号之前，用大于和小于符号封装：

#import <UIKit/UIKit.h>

@interface YourViewControllersName : UIViewController <UIAlertViewDelegate> {

   // your variable declarations are here...
}

 // your method declarations are here...

Answer 2

对不起大家来说，这对我的编译器/ xCode来说是一个问题，实际上并没有认识到我放入的代码或者其他类似的东西，环境被破坏了。