Question

我正在加载一个不同的xib，当用户翻转到横向并且效果很好时，但我注意到我的滑动事件没有注册。

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    if ([self currentlyInLandscapeMode:toInterfaceOrientation]) {
        [[NSBundle mainBundle] loadNibNamed:@"PhotosLandscape" owner:self options:nil];
    }else{
        [[NSBundle mainBundle] loadNibNamed:@"PhotosPortrait" owner:self options:nil];   
    }
}

- (BOOL)currentlyInLandscapeMode:(UIInterfaceOrientation)interfaceOrientation
{
    return (UIInterfaceOrientationIsLandscape(interfaceOrientation));
}

如何切换xib并保持我之前的视图/ xib中的所有状态？

更新

结果证明我的IBOutlets仍在工作，但我的滑动未注册

Answer 1

您无法使用nib文件布置现有对象。 nib文件存储为归档对象图，因此当您使用NSBundle的{{1}} loadNibNamed:或UIViewController initWithNibName:加载一个笔尖时，一组新的对象被实例化。

解决这个问题的唯一方法是使用loadNibNamed来实例化一组新对象，并使用他们的frame属性为现有对象设置frame s，这不是这是一个很好的解决方案。

Answer 2

原来我只需要在每个笔尖加载后重新注册滑动事件（如此）

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    if ([self currentlyInLandscapeMode:toInterfaceOrientation]) {
        [[NSBundle mainBundle] loadNibNamed:@"VotePhotosLandscape" owner:self options:nil];
    }else{
        [[NSBundle mainBundle] loadNibNamed:@"VotePhotosViewController" owner:self options:nil];   
    }
    [self wireupSwipeEvents];
}

- (BOOL)currentlyInLandscapeMode:(UIInterfaceOrientation)interfaceOrientation
{
    return (UIInterfaceOrientationIsLandscape(interfaceOrientation));
}

- (void)wireupSwipeEvents
{
    UISwipeGestureRecognizer *recognizer;
    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
    [recognizer setDirection:UISwipeGestureRecognizerDirectionLeft];
    [[self view] addGestureRecognizer:recognizer];
    [recognizer release]; 
}

如何在不丢失UISwipeGestures的情况下调用loadNibNamed？

2 个答案: