编辑：我向约翰颁发奖金，因为他在答案上付出了很多努力，无论如何都会得到它，但仍然没有可行的解决方案。我仍在寻找答案，如果有人知道如何做到这一点，我将不胜感激。
我想在我的应用中添加一个“最大化”按钮，隐藏导航和标签栏。导航栏和标签栏应平滑地滑入/滑出，内部/内容视图也应以与导航栏和标签栏相同的速率展开和缩小。
我使用[self.navigationController setNavigationBarHidden: YES/NO animated: YES];作为导航栏，发现此帖子How to hide uitabbarcontroller用于隐藏标签栏。
UITabBar类扩展：
- (void) setTabBarHidden:(BOOL)hidden animated:(BOOL)animated {
CGRect screenRect = [[UIScreen mainScreen] bounds];
float screenHeight = screenRect.size.height;
if (UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation)) {
screenHeight = screenRect.size.width;
}
if (!hidden) {
screenHeight -= self.tabBar.frame.size.height;
}
[UIView animateWithDuration: (animated ? UINavigationControllerHideShowBarDuration : 0) animations: ^{
for (UIView* each in self.view.subviews) {
if (each == self.tabBar) {
[each setFrame: CGRectMake(each.frame.origin.x, screenHeight, each.frame.size.width, each.frame.size.height)];
} else {
[each setFrame: CGRectMake(each.frame.origin.x, each.frame.origin.y, each.frame.size.width, screenHeight)];
}
}
} completion: ^(BOOL finished) {
NSLog(@"Animation finished %d", finished);
}];
}
问题是当我同时使用这两个（隐藏/显示导航和标签栏）时，它不干净。如果导航栏首先出现，锚定到底部的任何东西都会跳跃（参见下面的示例），如果标签栏首先出现，则顶部跳跃。
示例：我将UIButton置于右下角并设置其自动调整遮罩
resizeButton.frame = CGRectMake(self.view.bounds.size.width - 50, self.view.bounds.size.height - 100, 32, 32); // hardcoded just for testing purposes
resizeButton.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin;
但是当导航栏和标签栏最小化时，UIButton会在两种状态之间跳转（不会与标签栏一起滑动）。但是，如果我将其更改为附加到右上角，则它会与导航栏完美滑动。
有谁知道如何解决这个问题？
修改： 这是迄今为止我所拥有的壁橱和最优雅的解决方案（只是试图获得一个有效的概念）：
[UIView animateWithDuration: UINavigationControllerHideShowBarDuration animations: ^{
if (self.isMaximized) {
self.tabBarController.view.frame = CGRectMake(0, 20, screenRect.size.width, screenRect.size.height + 49 - 20);
[self.navigationController setNavigationBarHidden:YES animated:YES];
} else {
self.tabBarController.view.frame = CGRectMake(0, 20, screenRect.size.width, screenRect.size.height - 20);
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
} completion: ^(BOOL finished) {
NSLog(@"Frame done: %@", NSStringFromCGRect(self.view.frame));
return;
}];
最大化：
关于最小化：
如果我重新排列最小化动画的顺序（因此首先调用navbar animatino），那么内部/内容视图中的顶部会跳转
答案 0 :(得分：7)
我使用的解决方案应该消除您看到的跳转问题。
此解决方案源自找到Carlos Oliva's github page的Objective-C类别，虽然该代码的版权是“保留所有权利”，但我写了他并且他提供了使用许可。
我的类别代码与他的代码略有不同。另外，在类别代码下面找到我在我的应用程序中使用的调用代码。
来自UITabBarController + HideTabBar.m
// the self.view.frame.size.height can't be used directly in isTabBarHidden or
// in setTabBarHidden:animated: because the value may be the rect with a transform.
//
// further, an attempt to use CGSizeApplyAffineTransform() doesn't work because the
// value can produce a negative height.
// cf. http://lists.apple.com/archives/quartz-dev/2007/Aug/msg00047.html
//
// the crux is that CGRects are normalized, CGSizes are not.
- (BOOL)isTabBarHidden {
CGRect viewFrame = CGRectApplyAffineTransform(self.view.frame, self.view.transform);
CGRect tabBarFrame = self.tabBar.frame;
return tabBarFrame.origin.y >= viewFrame.size.height;
}
- (void)setTabBarHidden:(BOOL)hidden {
[self setTabBarHidden:hidden animated:NO];
}
- (void)setTabBarHidden:(BOOL)hidden animated:(BOOL)animated {
BOOL isHidden = self.tabBarHidden;
if (hidden == isHidden)
return;
UIView* transitionView = [self.view.subviews objectAtIndex:0];
if (!transitionView)
{
#if DEBUG
NSLog(@"could not get the container view!");
#endif
return;
}
CGRect viewFrame = CGRectApplyAffineTransform(self.view.frame, self.view.transform);
CGRect tabBarFrame = self.tabBar.frame;
CGRect containerFrame = transitionView.frame;
tabBarFrame.origin.y = viewFrame.size.height - (hidden ? 0 : tabBarFrame.size.height);
containerFrame.size.height = viewFrame.size.height - (hidden ? 0 : tabBarFrame.size.height);
[UIView animateWithDuration:kAnimationDuration
animations:^{
self.tabBar.frame = tabBarFrame;
transitionView.frame = containerFrame;
}
];
}
来自我的ScrollableDetailImageViewController.m
- (void)setBarsHidden:(BOOL)hidden animated:(BOOL)animated
{
[self setTabBarHidden:hidden animated:animated];
[self setStatusBarHidden:hidden animated:animated];
// must be performed after hiding/showing of statusBar
[self.navigationController setNavigationBarHidden:hidden animated:animated];
}
- (void)setTabBarHidden:(BOOL)hidden animated:(BOOL)animated
{
id parent = self.navigationController.parentViewController;
if ([parent respondsToSelector:@selector(isTabBarHidden)]
&& hidden != [parent isTabBarHidden]
&& [parent respondsToSelector:@selector(setTabBarHidden:animated:)])
[parent setTabBarHidden:hidden animated:animated];
}
答案 1 :(得分：-1)
只需尝试此代码，如果它正常工作。我在一年前写过这段代码。但是，它仍然适合我。
我没有使用基于块的动画。因为它是在我刚接触iOS时编写的。只需按照自己的意愿尝试优化自己。
- (void) hideTabBar:(UITabBarController *) tabbarcontroller {
[self.navigationController setNavigationBarHidden:YES animated:YES];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.1];
for(UIView *view in tabbarcontroller.view.subviews)
{
if ([[UIDevice currentDevice]userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
if([view isKindOfClass:[UITabBar class]])
{
[view setFrame:CGRectMake(view.frame.origin.x, 480, view.frame.size.width, view.frame.size.height)];
}
else
{
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 480)];
}
}else if([[UIDevice currentDevice]userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
if([view isKindOfClass:[UITabBar class]])
{
[view setFrame:CGRectMake(view.frame.origin.x, 1024, view.frame.size.width, view.frame.size.height)];
}
else
{
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 1024)];
}
}
}
[UIView commitAnimations];
}
// Method shows the bottom and top bars
- (void) showTabBar:(UITabBarController *) tabbarcontroller {
[self.navigationController setNavigationBarHidden:NO animated:YES];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.1];
for(UIView *view in tabbarcontroller.view.subviews)
{
if ([[UIDevice currentDevice]userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
if([view isKindOfClass:[UITabBar class]])
{
[view setFrame:CGRectMake(view.frame.origin.x, 430, view.frame.size.width, view.frame.size.height)];
}
else
{
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 436)];
}
}else if([[UIDevice currentDevice]userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
if([view isKindOfClass:[UITabBar class]])
{
[view setFrame:CGRectMake(view.frame.origin.x, 975, view.frame.size.width, view.frame.size.height)];
}
else
{
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 980)];
}
}
}
[UIView commitAnimations];
}
答案 2 :(得分：-2)
试试这个
您可以使用以下动画隐藏标签栏控制器和导航栏： -
-(IBAction)hide:(id)sender
{
[self hideShowBars];
}
- (void) hideShowBars
{
CGRect rect = self.navigationController.navigationBar.frame;
CGRect rect1 = self.tabBarController.tabBar.frame;
if(self.navigationController.navigationBar.isHidden)
{
[self.navigationController.navigationBar setHidden:NO];
rect.origin.y=self.view.frame.origin.y;
}
else
{
rect.origin.y=self.view.frame.origin.y-rect.size.height;
}
if(self.tabBarController.tabBar.isHidden)
{
[self.tabBarController.tabBar setHidden:NO];
rect1.origin.y=self.view.frame.size.height-rect1.size.height-rect1.size.height;
}
else
{
rect1.origin.y=self.view.frame.size.height;
}
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.50];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(hideShowBarsAnimationStopped)];
self.navigationController.navigationBar.frame=rect;
self.tabBarController.tabBar.frame = rect1;
[UIView commitAnimations];
}
- (void) hideShowBarsAnimationStopped
{
if(self.navigationController.navigationBar.frame.origin.y==self.view.frame.origin.y)
return;
if(!self.navigationController.navigationBar.isHidden)
{
[self.navigationController.navigationBar setHidden:YES];
}
if(!self.tabBarController.tabBar.isHidden)
{
[self.tabBarController.tabBar setHidden:YES];
}
}