[touch locationInView:[[UIApplication sharedApplication] keyWindow]]
keyWindow
The application's key window. (read-only)
@property(nonatomic, readonly)
UIWindow *keyWindow
Discussion
This property holds the UIWindow object in the windows array that is most recently sent the makeKeyAndVisible message.
本文介绍如何通过Objective-C代码获取iOS应用的关键视图位置,包括使用UIApplication.sharedApplication.keyWindow来获取窗口对象,理解其在窗口数组中的作用。
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