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iOS 13 presentViewController has updated transition way

Very surprised that my weather widget app is not updated it content automatically after a view has appeared.

First, I called
self presentViewController

to present a view, after closing that view, I hope that my below view will call 
-(void)viewWillAppear:(BOOL)animated{

but nothing happens.

I started figuring out that on iOS 13, the view which is presented is displaying like a floating window, not fullscreen, like below.


This is new in iOS 13. Quite cool, you can swipe the screen down, without pressing a close button.

in order to get the below view called, you need to use Delegate


BIG CHANGE~





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