I am trying to mimic the UINavigationController's new hidesBarsOnTap
with a tab bar. I have seen many answers to this that either point to setting the hidesBottomBarWhenPushed
on a viewController which only hides it entirely and not when tapped.
我试图用标签栏模仿UINavigationController的新hidesBarsOnTap。我已经看到很多答案要么指向在viewController上设置hidesBottomBarWhenPushed,它只是完全隐藏它而不是在点击时。
@IBAction func tapped(sender: AnyObject) {
// what goes here to show/hide the tabBar ???
}
thanks in advance
提前致谢
EDIT: as per the suggestion below I tried
编辑:根据下面的建议我试过
self.tabBarController?.tabBar.hidden = true
which does indeed hide the tabBar (toggles true/false on tap), but without animation. I will ask that as a separate question though.
确实隐藏了tabBar(在点击时切换true / false),但没有动画。我会问这是一个单独的问题。
46
After much hunting and trying out various methods to gracefully hide/show the UITabBar using Swift I was able to take this great solution by danh and convert it to Swift:
经过多次搜索和尝试各种方法来优雅地隐藏/显示使用Swift的UITabBar我能够通过danh采用这个伟大的解决方案并将其转换为Swift:
func setTabBarVisible(visible:Bool, animated:Bool) {
//* This cannot be called before viewDidLayoutSubviews(), because the frame is not set before this time
// bail if the current state matches the desired state
if (tabBarIsVisible() == visible) { return }
// get a frame calculation ready
let frame = self.tabBarController?.tabBar.frame
let height = frame?.size.height
let offsetY = (visible ? -height! : height)
// zero duration means no animation
let duration:NSTimeInterval = (animated ? 0.3 : 0.0)
// animate the tabBar
if frame != nil {
UIView.animateWithDuration(duration) {
self.tabBarController?.tabBar.frame = CGRectOffset(frame!, 0, offsetY!)
return
}
}
}
func tabBarIsVisible() ->Bool {
return self.tabBarController?.tabBar.frame.origin.y
25
Loved Michael Campsall's answer. Here's the same code as extension, if somebody is interested:
喜欢Michael Campsall的回答。如果有人感兴趣,这里的代码与扩展名相同:
Swift 2.3
斯威夫特2.3
extension UITabBarController {
func setTabBarVisible(visible:Bool, animated:Bool) {
// bail if the current state matches the desired state
if (tabBarIsVisible() == visible) { return }
// get a frame calculation ready
let frame = self.tabBar.frame
let height = frame.size.height
let offsetY = (visible ? -height : height)
// animate the tabBar
UIView.animateWithDuration(animated ? 0.3 : 0.0) {
self.tabBar.frame = CGRectOffset(frame, 0, offsetY)
self.view.frame = CGRectMake(0, 0, self.view.frame.width, self.view.frame.height + offsetY)
self.view.setNeedsDisplay()
self.view.layoutIfNeeded()
}
}
func tabBarIsVisible() ->Bool {
return self.tabBar.frame.origin.y
Swift 3
斯威夫特3
extension UIViewController {
func setTabBarVisible(visible: Bool, animated: Bool) {
//* This cannot be called before viewDidLayoutSubviews(), because the frame is not set before this time
// bail if the current state matches the desired state
if (isTabBarVisible == visible) { return }
// get a frame calculation ready
let frame = self.tabBarController?.tabBar.frame
let height = frame?.size.height
let offsetY = (visible ? -height! : height)
// zero duration means no animation
let duration: TimeInterval = (animated ? 0.3 : 0.0)
// animate the tabBar
if frame != nil {
UIView.animate(withDuration: duration) {
self.tabBarController?.tabBar.frame = frame!.offsetBy(dx: 0, dy: offsetY!)
return
}
}
}
var isTabBarVisible: Bool {
return (self.tabBarController?.tabBar.frame.origin.y ?? 0)
13
I had to adapt the accepted answer to this question a bit. It was hiding the bar but my view wasn't sizing itself appropriately so I was left with a space at the bottom.
我必须稍微调整一下这个问题的答案。它隐藏了酒吧,但我的观点并没有适当调整大小,所以我在底部留下了一个空间。
The following code successfully animates the hiding of the tab bar while resizing the view to avoid that issue.
以下代码成功设置了在调整视图大小时隐藏选项卡栏以避免该问题的动画。
Updated for Swift 3 (now with less ugly code)
针对Swift 3进行了更新(现在代码更简单)
func setTabBarVisible(visible: Bool, animated: Bool) {
guard let frame = self.tabBarController?.tabBar.frame else { return }
let height = frame.size.height
let offsetY = (visible ? -height : height)
let duration: TimeInterval = (animated ? 0.3 : 0.0)
UIView.animate(withDuration: duration,
delay: 0.0,
options: UIViewAnimationOptions.curveEaseIn,
animations: { [weak self] () -> Void in
guard let weakSelf = self else { return }
weakSelf.tabBarController?.tabBar.frame = frame.offsetBy(dx: 0, dy: offsetY)
weakSelf.view.frame = CGRect(x: 0, y: 0, width: weakSelf.view.frame.width, height: weakSelf.view.frame.height + offsetY)
weakSelf.view.setNeedsDisplay()
weakSelf.view.layoutIfNeeded()
})
}
func handleTap(recognizer: UITapGestureRecognizer) {
setTabBarVisible(visible: !tabBarIsVisible(), animated: true)
}
func tabBarIsVisible() -> Bool {
guard let tabBar = tabBarController?.tabBar else { return false }
return tabBar.frame.origin.y
Older Swift 2 Version
较旧的Swift 2版本
func setTabBarVisible(visible: Bool, animated: Bool) {
// hide tab bar
let frame = self.tabBarController?.tabBar.frame
let height = frame?.size.height
var offsetY = (visible ? -height! : height)
println ("offsetY = \(offsetY)")
// zero duration means no animation
let duration:NSTimeInterval = (animated ? 0.3 : 0.0)
// animate tabBar
if frame != nil {
UIView.animateWithDuration(duration) {
self.tabBarController?.tabBar.frame = CGRectOffset(frame!, 0, offsetY!)
self.view.frame = CGRectMake(0, 0, self.view.frame.width, self.view.frame.height + offsetY!)
self.view.setNeedsDisplay()
self.view.layoutIfNeeded()
return
}
}
}
@IBAction func handleTap(recognizer: UITapGestureRecognizer) {
setTabBarVisible(!tabBarIsVisible(), animated: true)
}
func tabBarIsVisible() -> Bool {
return self.tabBarController?.tabBar.frame.origin.y
6
You can just add this line to ViewDidLoad() in swift :
你可以在swift中将这一行添加到ViewDidLoad()中:
self.tabBarController?.tabBar.hidden = true
2
I use tabBar.hidden = YES in ObjC to hide the tab bar in certain cases. I have not tried wiring it up to a tap event, though.
我在ObjC中使用tabBar.hidden = YES来隐藏某些情况下的标签栏。不过,我还没有尝试将它连接到点击事件。
2
Code is okay but when you use presentViewController
, tabBarIsVisible()
is not working. To keep UITabBarController
always hidden use just this part:
代码没问题但是当你使用presentViewController时,tabBarIsVisible()不起作用。要保持UITabBarController永远隐藏,请使用以下部分:
extension UITabBarController {
func setTabBarVisible(visible:Bool, animated:Bool) {
let frame = self.tabBar.frame
let height = frame.size.height
let offsetY = (visible ? -height : height)
UIView.animateWithDuration(animated ? 0.3 : 0.0) {
self.tabBar.frame = CGRectOffset(frame, 0, offsetY)
self.view.frame = CGRectMake(0, 0, self.view.frame.width, self.view.frame.height + offsetY)
self.view.setNeedsDisplay()
self.view.layoutIfNeeded()
}
}
}
0
Swift 3 version:
Swift 3版本:
func setTabBarVisible(visible:Bool, animated:Bool) {
//* This cannot be called before viewDidLayoutSubviews(), because the frame is not set before this time
// bail if the current state matches the desired state
if (tabBarIsVisible() == visible) { return }
// get a frame calculation ready
let frame = self.tabBarController?.tabBar.frame
let height = frame?.size.height
let offsetY = (visible ? -height! : height)
// zero duration means no animation
let duration:TimeInterval = (animated ? 0.3 : 0.0)
// animate the tabBar
if frame != nil {
UIView.animate(withDuration: duration) {
self.tabBarController?.tabBar.frame = (self.tabBarController?.tabBar.frame.offsetBy(dx: 0, dy: offsetY!))!
return
}
}
}
func tabBarIsVisible() ->Bool {
return (self.tabBarController?.tabBar.frame.origin.y)!
-2
To make the animations work with self.tabBarController?.tabBar.hidden = true
just do this:
要使动画与self.tabBarController一起使用?.tabBar.hidden = true,请执行以下操作:
UIView.animateWithDuration(0.2, animations: {
self.tabBarController?.tabBar.hidden = true
})
Other than the other solution this will also work nicely with autolayout.
除了其他解决方案,这也适用于autolayout。