UIViewController的presentedViewController，presentingViewController和parentViewController三个属性

来源：互联网发布：特种设备考试软件编辑：程序博客网时间：2024/04/28 14:43

presentedViewController：The view controller that is presented by this view controlller(read-only)，被本视图控制器present出来的的视图控制器（只读）

presentingViewController：The view controller that presented this view controller. (read-only)，present出来本视图控制器的视图控制器（只读）

parentViewController：The parent view controller of the recipient(容器). (read-only)

有ViewControllerA和ViewControllerB，在A里使用presentViewController:animated:completion: 方法present视图控制器B

ViewControllerB *viewb = [[ViewControllerBalloc] init];

[selfpresentViewController:viewb animated:YEScompletion:nil];

NSLog(@"self.presentedViewController： %@",self.presentedViewController);

NSLog(@"self.presentingViewController： %@",self.presentingViewController);

NSLog(@"self.parentViewController： %@",self.parentViewController);

NSLog(@"======================================================================");

NSLog(@"viewb.presentedViewController： %@", viewb.presentedViewController);

NSLog(@"viewb.presentingViewController： %@", viewb.presentingViewController);

NSLog(@"viewb.parentViewController： %@", viewb.parentViewController);

打印结果为：

2015-07-30 10:38:45.923 PresentDemo[1518:85346] self.presentedViewController： <ViewControllerB: 0x7ff6c974a440>

2015-07-30 10:38:45.924 PresentDemo[1518:85346] self.presentingViewController： (null)

2015-07-30 10:38:45.924 PresentDemo[1518:85346] self.parentViewController： (null)

2015-07-30 10:38:45.924 PresentDemo[1518:85346] ======================================================================

2015-07-30 10:38:45.924 PresentDemo[1518:85346] viewb.presentedViewController： (null)

2015-07-30 10:38:45.924 PresentDemo[1518:85346] viewb.presentingViewController： <ViewController: 0x7ff6c9729e40>

2015-07-30 10:38:45.924 PresentDemo[1518:85346] viewb.parentViewController： (null)

视图控制器B被本视图控制器（A）present，所以A的presentedViewController是ViewControllerB，B的presentingViewController是ViewController（即A）

1 0