Question

我有一个从app delegate设置的登录屏幕，如下所示：

  NSUserDefaults *def = [NSUserDefaults standardUserDefaults];
BOOL needsPassCheck = [def boolForKey:kHasPassword];
if (needsPassCheck) {
    UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle: nil];

    VerifyPasswordViewController *passC = (VerifyPasswordViewController *)[mainStoryboard instantiateViewControllerWithIdentifier:@"passCheck"];
    passC.loginCheck = YES;
    self.window.rootViewController = passC;
}

在视图控制器中，启动方法是：

    - (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    if (self.loginCheck) {
        [self.topBar setHidden:YES];
        self.enterPLabel.text = NSLocalizedString(@"Enter Password", @"Enter Password");
    }else {
        [self.topBar setHidden:NO];
        self.enterPLabel.text = NSLocalizedString(@"Enter Old Password", @"Enter Old Password");
    }

    [self.continueButton setTitle:NSLocalizedString(@"Continue", @"Continue") forState:UIControlStateNormal];
 }

-(void)viewDidAppear:(BOOL)animated
{

    [self.passwordTextField becomeFirstResponder];

    [self viewDidAppear:animated];

}

问题在于它似乎无限循环： http://i.imgur.com/KmarG.png

有什么问题？我如何解决它？

Answer 1

是的，它是obvous，你的代码中有递归。在每个viewDidAppear中，您调用另一个viewDidAppear。而不是：

[self viewDidAppear:animated];

呼叫：

[super viewDidAppear:animated];

登录界面ios5冻结

1 个答案: