Question

我希望我的子视图控制器标记为“navView”在应用程序启动时显示在屏幕外，并在按下按钮时显示动画。但是当我启动模拟器时，“navView”已经出现了。

    - (void)viewDidLoad
{
    [super viewDidLoad];

    draw1 = 0;

    navView.frame = CGRectMake(-568, 0, 320, 568);

    newsView.frame = CGRectMake(0, 0, 320, 568);
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


- (IBAction)sideNav:(id)sender {

    if (draw1 == 0) {
        draw1 = 1;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.4];
        [UIView setAnimationDelay:0.0];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

        navView.frame = CGRectMake(0, 0, 320, 568);
        newsView.frame = CGRectMake(1136, 0, 320, 568);

        [UIView commitAnimations];
    } else {
        draw1 = 0;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.4];
        [UIView setAnimationDelay:0.0];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

        navView.frame = CGRectMake(0, 0, 320, 568);
        newsView.frame = CGRectMake(-500, 0, 320, 568);

        [UIView commitAnimations];

Answer 1

是在storyboard / xib中创建的navBar IBOutlet还是以编程方式创建它？如果您在storyboard中添加它，请确保已创建与视图控制器的连接。现在它看起来不像那样，因为在大多数情况下，您可以访问自己的插座作为self.navBar。

如果您在viewDidLoad中以编程方式创建替换行：

navView.frame = CGRectMake(-568, 0, 320, 568);

使用：

YOURNAVBARCLASS *navView = [[YOURNAVBARCLASS alloc] initWithFrame:CGRectMake(-568, 0, 320, 568)];
[self.view addSubview:navView];

YOURNAVBARCLASS是从中创建navBar的类。

如果你的navBar是UINavigationBar的子类，你应该使用

[navigationController setNavigationBarHidden: YES animated:YES]

ViewDidLoad的问题

1 个答案: