iOS获取当前显示页面controller

2017-07-24  本文已影响22人  时米高的人生笔记
关于window
//获取到当前显示界面的controller
- (UIViewController *)getCurrentVC{
    
    UIWindow * window = [[UIApplication sharedApplication] keyWindow];

    if (window.windowLevel != UIWindowLevelNormal){
        NSArray *windows = [[UIApplication sharedApplication] windows];        
        for(UIWindow * tmpWin in windows){
            if (tmpWin.windowLevel == UIWindowLevelNormal){
                window = tmpWin;
                break;
            }
        }
    }
    UIViewController *result = window.rootViewController;
    while (result.presentedViewController) {
        result = result.presentedViewController;
    }
    if ([result isKindOfClass:[BasicTabBarC class]]) {
        result = [(BasicTabBarC *)result selectedViewController];
    }
    if ([result isKindOfClass:[UINavigationController class]]) {
        result = [(UINavigationController *)result topViewController];
    }
    return result;
}
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