Question

我有两个视图控制器。当我在'A'视图控制器中呈现模态'B'视图控制器然后关闭它时，在'A'视图控制器中查看将其帧从{{0,0}，{320,480}}更改为{{0,0 }，{0,0}}。所有子视图都不会更改其位置，但不会响应。

控制器'A'代码：

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.translatesAutoresizingMaskIntoConstraints = NO;
    self.logoImageView.translatesAutoresizingMaskIntoConstraints = NO;
    self.view.backgroundColor = WHITE_C;
    buttonHeight = self.view.frame.size.height/5;
    buttonYPosition = self.view.frame.size.height - buttonHeight;
    buttonW = self.view.frame.size.width/2;
    [self configureButtons];
}

- (void) viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
}

- (void) viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
}

- (void) auth {
    [self performSegueWithIdentifier:segueToAuth sender:self];
}

控制器'B'代码：

- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationController.navigationBar.barTintColor = ORANGE_C;

    UIImage * backArrow = [UIImage imageNamed:@"back_orange.png"];
    UIBarButtonItem * back = [[UIBarButtonItem alloc] initWithImage:backArrow style:UIBarButtonItemStylePlain target:self action:@selector(backToWelcomeScreen)];
    [self.navigationItem setLeftBarButtonItems:@[back]];
}

#pragma mark - Buttons

- (void) backToWelcomeScreen {
    [self dismissViewControllerAnimated:YES completion:nil];
}

有人知道为什么会这样吗？

我尝试按viewDidAppear:设置帧，但没有任何反应。

Answer 1

问题在于：

self.view.translatesAutoresizingMaskIntoConstraints = NO; self.logoImageView.translatesAutoresizingMaskIntoConstraints = NO;

删除应用后效果很好。

Answer 2

您的分隔符视图宽度和高度取决于按钮大小，并且您只在下次设置视图框架时在viewdidload中设置按钮大小按钮大小为nil

父视图在解除模态视图控制器后更改其框架

2 个答案: