ios - 通过 UIAlertview 处理推送通知

Question

接收推送通知并尝试通过警报 View 进行处理，并在选择警报 View 按钮时想要导航到特定的 View Controller 。

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
UIApplicationState state = [application applicationState];
if (state == UIApplicationStateActive) {
    NSString *cancelTitle = @"Close";
    NSString *showTitle = @"Show";
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"App"
                                                        message:@"You got a new request."
                                                       delegate:self
                                              cancelButtonTitle:cancelTitle
                                              otherButtonTitles:showTitle, nil];
    [alertView show];

} else {
    //Do stuff that you would do if the application was not active
}
}

我想在点击显示按钮时移动到另一个 View Controller 。

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex == 0)
{

}
if(buttonIndex == 1)
{
    [self showNewContact];
}
}

-(void)showNewContact
{

Edit_app_viewController *detail=[[Edit_app_viewController alloc]init];

UIViewController *c = [self topViewController];
NSLog(@"View iS %@",c);

[c.navigationController pushViewController:detail animated:YES];

}

接收错误:由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因:“-[_UIModalItemsPresentingViewController pushViewController:animated:]: 无法识别的选择器发送到实例 0x169f5f10”*** 首先抛出调用栈:

请指导。

更新:

 - (UIViewController*)topViewController
{
return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}

Answer 1

使用此方法计算您的顶 View Controller 。

+ (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController
{
    if ([rootViewController isKindOfClass:[UITabBarController class]]) {
        UITabBarController* tabBarController = (UITabBarController*)rootViewController;
        return [self topViewControllerWithRootViewController:tabBarController.selectedViewController];
    } else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
        UINavigationController* navigationController = (UINavigationController*)rootViewController;
        return [self topViewControllerWithRootViewController:navigationController.visibleViewController];
    } else if (rootViewController.presentedViewController) {
        UIViewController* presentedViewController = rootViewController.presentedViewController;
        return [self topViewControllerWithRootViewController:presentedViewController];
    } else {
        return rootViewController;
    }
}