当loadView再次调用时，iOS7 View会在状态/导航栏下移动 [英] iOS7 View moves under status/nav bars when loadView called again

问题描述

我有一个View Controller，它通过 loadView 方法以编程方式创建视图。视图的目的是显示数据模型内容。加载视图时，它在状态和导航栏下正确对齐。

I have a View Controller that creates its view programatically through the loadView method. The purpose of the view is to display a data models contents. When the view loads it is aligned correctly under the status and navigation bar.

但稍后我会以模态方式呈现另一个视图，以允许用户选择不同的数据模型来填充视图。这会导致再次调用 loadView ，并为新数据模型重新创建所需的UI。问题是视图的内容现在显示在状态和导航栏下！

But at a later point I present another view modally to allow the user to select a different data model to populate the view. This causes the the loadView to get called again and re-create the required UI for the new data model. The problem is that the view's contents now appear under the status and navigation bars!

请注意，由于必须支持iOS4，我没有使用自动布局:(另外如果我包含 extendedLayout 修复 - 它确实解决了问题，但只有在模态的消除动画完成后才会产生跳转效果。我的代码如下，感谢您的帮助。

Please note that I am not using auto-layout due to having to support iOS4 :( Also if I include the extendedLayout fix - it does fix the problem but only after the modal's dismiss animation completes leaving a jump down effect. My code below, thanks for any help.

- (void)loadView {

CGRect frame = CGRectMake(0, 0, [Constants ScreenWidth], [Constants ScreenHeight] - StatusBarHeight - ToolbarHeight);
self.view = [[UIView alloc] initWithFrame:frame];
self.view.autoresizingMask = UIViewAutoresizingFlexibleHeight;
self.view.autoresizesSubviews = YES;
self.view.backgroundColor = [Constants categoriesScreenBackgroundColor];

CGRect scrollFrame = CGRectMake(0, 0, [Constants ScreenWidth], [Constants ScreenHeight] - StatusBarHeight - ToolbarHeight - ToolbarHeight);
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:scrollFrame];
scrollView.autoresizingMask = UIViewAutoresizingFlexibleHeight |
        UIViewAutoresizingFlexibleBottomMargin |
        UIViewAutoresizingFlexibleTopMargin;
[self.view addSubview:scrollView];

_toolbarViewController = [self createToolbarViewController];
[self.view addSubview:_toolbarViewController.view];
_toolbarViewController.productInfoWorkflowState = _productInfoWorkflowState;

UIView *containerView = [[UIView alloc] initWithFrame:scrollView.frame];
containerView.backgroundColor = [UIColor clearColor];

_headerViewController = [self createHeaderViewController];
[containerView addSubview:_headerViewController.view];

_menuViewController = [[ProductInfoMenuViewController alloc] initWithBatch:[self batchData]];
_menuViewController.delegate = self;
[containerView addSubview:_menuViewController.view];

CGRect categoriesFrame = _menuViewController.view.frame;
categoriesFrame.origin.y = _headerViewController.view.frame.size.height;
_menuViewController.view.frame = categoriesFrame;

CGRect viewFrame = containerView.frame;
viewFrame.size.height = _headerViewController.view.frame.size.height + _menuViewController.view.frame.size.height;
containerView.frame = viewFrame;

[scrollView addSubview:containerView];
scrollView.contentSize = containerView.frame.size;

_starViewController = [[StarViewController alloc] initForProduct:_productData With:[StarredItems new]];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:_starViewController.view];
}

首次加载后的屏幕布局：

Screen layout after first load:

第二次加载后的屏幕布局：

Screen layout after second load:

使用Leo的建议修复，scrollView是正确的但是底部的工具栏现在显示不正确。我使用的代码（放在上面的工具栏创建代码之后）：

With Leo's suggested fix, the scrollView is correct BUT the toolbar at the bottom now appears incorrectly. Code I used (placed after the toolbar creation code above):

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
    self.automaticallyAdjustsScrollViewInsets = NO;
    scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(64.0f, 0.0f, 0.0f, 0.0f);
    scrollView.contentInset = UIEdgeInsetsMake(64.0f, 0.0f, 0.0f, 0.0f);
}

结果：

推荐答案

为同样的问题添加以下代码，我的工作可能是它的帮助

Add following code its work for me for same issue, may be its help you

/* ios 7 Change */
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7)
    {
        self.edgesForExtendedLayout = UIRectEdgeNone;
        self.automaticallyAdjustsScrollViewInsets = NO;
    }

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