ios - addChildViewController 不适合 UIViewController

Question

灵感来自 Scott Sherwood tutorial我在 UIViewController 中有一个 UIView，它通过自定义 segues 对不同的 UItableviewController/UIViewController 收费。

segue.m

- (void) perform {

DashboardViewController *controller = (DashboardViewController *)self.sourceViewController;
UIViewController *dst = (UIViewController *) self.destinationViewController;

for(UIView *view in controller.container.subviews){
    [view removeFromSuperview];
}


controller.currentViewController = dst;
[controller addChildViewController:dst];
[controller.container addSubview:dst.view];
}

第一个segue是在viewDidLoad方法中调用的

controller.m

- (void)viewDidLoad {
[super viewDidLoad];
[self performSegueWithIdentifier:@"dashboardNewPon" sender:[self.buttons.subviews objectAtIndex:0]];
}

然后画面就这样开始了

其他segues，有这个行为

我不明白为什么，但它肯定会自动布局。

谢谢

Answer 1

我通过阅读这篇文章找到了解决方案 article .

在这一行之后

[controller.container addSubview:dst.view];

我加了这个

dst.view.translatesAutoresizingMaskIntoConstraints = NO;

[controller.container addConstraint:[NSLayoutConstraint constraintWithItem:dst.view
                                                           attribute:NSLayoutAttributeTop
                                                           relatedBy:NSLayoutRelationEqual
                                                              toItem:controller.container
                                                           attribute:NSLayoutAttributeTop
                                                          multiplier:1.0
                                                            constant:0.0]];

[controller.container addConstraint:[NSLayoutConstraint constraintWithItem:dst.view
                                                      attribute:NSLayoutAttributeLeading
                                                      relatedBy:NSLayoutRelationEqual
                                                         toItem:controller.container
                                                      attribute:NSLayoutAttributeLeading
                                                     multiplier:1.0
                                                       constant:0.0]];

[controller.container addConstraint:[NSLayoutConstraint constraintWithItem:dst.view
                                                      attribute:NSLayoutAttributeBottom
                                                      relatedBy:NSLayoutRelationEqual
                                                         toItem:controller.container
                                                      attribute:NSLayoutAttributeBottom
                                                     multiplier:1.0
                                                       constant:0.0]];

[controller.container addConstraint:[NSLayoutConstraint constraintWithItem:dst.view
                                                      attribute:NSLayoutAttributeTrailing
                                                      relatedBy:NSLayoutRelationEqual
                                                         toItem:controller.container
                                                      attribute:NSLayoutAttributeTrailing
                                                     multiplier:1.0
                                                       constant:0.0]];