添加 ChildViewController 会导致 child viewcontroller 出现奇怪的行为

Question

"strange"，我注意到以下行为：

ChildViewController设置的背景颜色没有出现
尽管向 ChildViewController 添加了基本的点击手势识别器，但没有点击识别
向 ChildViewController 添加 UIButton 结果显示 UIButton，但点击 UIButton 部分时没有响应

在我的 ParentViewController 中，我非常笼统地呈现 ChildViewController，如下所示：

UIViewController *viewController;
viewController = (ChildViewController *)[self.storyboard instantiateViewControllerWithIdentifier:@"ChildViewController"];

[self addChildViewController:viewController];

viewController.view.frame = self.view.bounds;
viewController.view.translatesAutoresizingMaskIntoConstraints = NO;
viewController.view.center = self.view.center;
[self.view addSubview:viewController.view];
[self.view bringSubviewToFront:viewController.view];

[viewController didMoveToParentViewController:self];

下面是我在 ChildViewController 的 viewDidLoad:

中所做的一些非常基本的事情

self.view.backgroundColor = [UIColor yellowColor];
UIButton *tapButton = [UIButton buttonWithType:UIButtonTypeSystem];
[tapButton addTarget:self action:@selector(tappedOnTap) forControlEvents:UIControlEventTouchUpInside];
//button view customization code omitted for brevity 
tapButton.userInteractionEnabled = YES;
tapButton.enabled = YES;
[self.view addSubview:tapButton];

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tappedOnView)];
[self.view addGestureRecognizer:tapGesture];
[self.view setUserInteractionEnabled:YES];
[self.view addGestureRecognizer:tapGesture];

我确保一切都正确连接 - 但是，当我在模拟器或设备中点击它时，tappedOnView 和 tappedOnTap 中没有确认。

我是否遗漏了一些关于呈现 ChildViewController 的基本知识？

编辑

对于那些好奇的人，这个非常基本的应用程序在 Github。

Answer 1

试试这个：

ChildViewController *viewController;
viewController = [self.storyboard instantiateViewControllerWithIdentifier:@"ChildViewController"];

viewController.view.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleheight;

[self addChildViewController:viewController];
[self.view addSubview:viewController.view];
[viewController didMoveToParentViewController:self];

Usually you don't need to do anything when adding a ViewController to another except those basic methods. since the views will be adjusted automatically and you don't need to set all those properties like size and center etc...

Answer 2

围堵电话没问题。但是，如果您使用视图调试器 ()，您会发现 frame 不正确。这是因为您已关闭 translatesAutoresizingMaskIntoConstraints，但您没有任何限制。您可以重新打开它（并相应地设置 autoresizingMask）：

viewController.view.translatesAutoresizingMaskIntoConstraints = true;

或者您可以定义约束而不是设置 frame（并冗余设置 center）：

//viewController.view.frame = self.view.bounds;
viewController.view.translatesAutoresizingMaskIntoConstraints = false;
//viewController.view.center = self.view.center;

[self.view addSubview:viewController.view];

[NSLayoutConstraint activateConstraints:@[
    [viewController.view.topAnchor constraintEqualToAnchor:self.view.topAnchor],
    [viewController.view.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor],
    [viewController.view.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
    [viewController.view.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor]
]];

添加 ChildViewController 会导致 child viewcontroller 出现奇怪的行为

Adding a ChildViewController causes strange behavior to the child viewcontroller

objective-c

uibutton

ios

childviewcontroller