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#import "TestViewController.h" #import "OneViewController.h"
在TextViewController写入点击事件：
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self click]; }
- (void)click { OneViewController * vc = [OneViewController new]; [self presentViewController:vc animated:YES completion:nil]; NSLog(@"%@",NSStringFromClass([self.presentationController class])); NSLog(@"%@",NSStringFromClass([self.presentedViewController class])); NSLog(@"%@",NSStringFromClass([self.presentingViewController class])); NSLog(@"%@",NSStringFromClass([vc.presentationController class])); NSLog(@"%@",NSStringFromClass([vc.presentedViewController class])); NSLog(@"%@",NSStringFromClass([vc.presentingViewController class])); }
打印结果：
2015-10-07 11:49:38.933 ceshi[2610:61561] _UIFullscreenPresentationController 2015-10-07 11:49:38.933 ceshi[2610:61561] OneViewController 2015-10-07 11:49:38.933 ceshi[2610:61561] (null) 2015-10-07 11:49:38.934 ceshi[2610:61561] _UIFullscreenPresentationController 2015-10-07 11:49:38.934 ceshi[2610:61561] (null) 2015-10-07 11:49:38.934 ceshi[2610:61561] TestViewController
在OneViewController的ViewDidAppear写入：
- (void)viewDidAppear:(BOOL)animated { NSLog(@"%@",NSStringFromClass([self.presentationController class])); NSLog(@"%@",NSStringFromClass([self.presentedViewController class])); NSLog(@"%@",NSStringFromClass([self.presentingViewController class])); }
打印结果：
2015-10-07 11:49:39.437 ceshi[2610:61561] _UIFullscreenPresentationController 2015-10-07 11:49:39.437 ceshi[2610:61561] (null) 2015-10-07 11:49:39.437 ceshi[2610:61561] TestViewController
总结：
presented 和 presenting 都是相对于当前UIViewController自己的。
我的理解，presented就是当前UIViewController有权利弹出的VC对象，presenting就是把当前UIViewController给弹出的对象。
我再理解了一下，presented就是当前UIViewController的儿子
presenting就是当前UIViewController的老子
以上都是我的理解，希望前辈指点
UIViewController 的 presentedViewController 和 presentingViewController
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原文地址：http://www.cnblogs.com/R0SS/p/4858480.html
