iphone - AlertView正在运行，但未显示didReceiveRemoteNotification

使用调试器，我确保已调用[alertView show];，但是该对话框不可见，我还需要做些什么才能使其显示出来？

- (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];
        }
    }
}

最佳答案

在视图控制器.h文件中，需要像这样在大括号前声明<UIAlertViewDelegate>，并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...

关于iphone - AlertView正在运行，但未显示didReceiveRemoteNotification，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/14593874/