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  • UI基础 获取当前屏幕显示的viewcontroller

     1 #pragma mark - 获取当前屏幕显示的viewcontroller
     2 - (UIViewController *)getCurrentVC
     3 {
     4     UIViewController *result = nil;
     5     
     6     UIWindow * window = [[UIApplication sharedApplication] keyWindow];
     7     if (window.windowLevel != UIWindowLevelNormal)
     8     {
     9         NSArray *windows = [[UIApplication sharedApplication] windows];
    10         for(UIWindow * tmpWin in windows)
    11         {
    12             if (tmpWin.windowLevel == UIWindowLevelNormal)
    13             {
    14                 window = tmpWin;
    15                 break;
    16             }
    17         }
    18     }
    19     
    20     UIView *frontView = [[window subviews] objectAtIndex:0];
    21     id nextResponder = [frontView nextResponder];
    22     
    23     if ([nextResponder isKindOfClass:[UIViewController class]])
    24         result = nextResponder;
    25     else
    26         result = window.rootViewController;
    27     
    28     return result;
    29 }

    如果想进行push和pop,需要将调用方法得到的返回值强制类型转换为UINavigationController类型

    1 UINavigationController *NC = (UINavigationController *)[self getCurrentVC];
    2 [NC popViewControllerAnimated:YES];
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  • 原文地址:https://www.cnblogs.com/fearlessyyp/p/5507804.html
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