有没有办法隐藏tabbar并删除剩余的空间(约50px)?
我试过了
self.tabBarController?.tabBar.hidden = true
self.extendedLayoutIncludesOpaqueBars = true
没运气。我看到空白。
有时,最简单的方法就是添加一个使用UIScreen边界的视图。
let whiteView = UIView()
whiteView.backgroundColor = .white
view.addSubview(whiteView)
whiteView.translatesAutoresizingMaskIntoConstraints = false
whiteView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
whiteView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
whiteView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
whiteView.heightAnchor.constraint(equalToConstant: UIScreen.main.bounds.height).isActive = true
有时,如果扩展视图布局,有时视图边缘会延伸到导航栏之外,从而给您带来新问题。
此代码适用于iOS 10,11和iPhone X(包括模拟器)以显示/隐藏tabBar。我创建了几年(iOS 7时间框架?),从那时起它已经可靠地工作了。
只要childViewControllers(在选项卡中)中的内容内容固定到topLayoutGuide
,bottomLayoutGuide
或SafeArea而不是主视图墙,它在iPhone X上运行良好。然后一切正常。请享用!
@interface UITabBarController (HideTabBar)
@property (nonatomic, getter=isTabBarHidden) BOOL tabBarHidden;
-(void)setTabBarHidden:(BOOL)hidden animated:(BOOL)animated;
@end
@implementation UITabBarController (HideTabBar)
-(BOOL)isTabBarHidden
{
CGRect viewFrame = self.view.frame;
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 reverseObjectEnumerator] allObjects] lastObject];
if(transitionView == nil) {
NSLog(@"UITabBarCategory can't get the container view");
return;
}
CGRect viewFrame = self.view.bounds;
CGRect tabBarFrame = self.tabBar.frame;
CGRect containerFrame = transitionView.frame;
CGRect selectedVCFrame = containerFrame;
tabBarFrame.origin.y = viewFrame.size.height - (hidden ? 0 : tabBarFrame.size.height);
containerFrame.size.height = viewFrame.size.height - (hidden ? 0 : tabBarFrame.size.height);
if([self.moreNavigationController.viewControllers containsObject:self.selectedViewController]) {
selectedVCFrame = self.selectedViewController.view.frame;
selectedVCFrame.size.height += hidden ? tabBarFrame.size.height : -tabBarFrame.size.height;
}
self.selectedViewController.view.frame = selectedVCFrame;
[UIView animateWithDuration:.5 animations:^{
self.tabBar.frame = tabBarFrame;
transitionView.frame = containerFrame;
[self.selectedViewController.view setNeedsLayout];
}];
}
@end
用法 - 我在viewController中调用旋转事件,如下所示:
-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
[super didRotateFromInterfaceOrientation:fromInterfaceOrientation];
// Hide TabBar on iPhone, iPod Touch
if([UIDevice currentDevice].userInterfaceIdiom != UIUserInterfaceIdiomPad) {
if(_startDateEditor.editing) return;
if(fromInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown || fromInterfaceOrientation == UIInterfaceOrientationPortrait)
[self.tabBarController setTabBarHidden:YES animated:YES];
else
[self.tabBarController setTabBarHidden:NO animated:YES];
}
}
我面临同样的问题,根本原因是BOTTOM CONSTRAINT
确保使用SUPERVIEW设置主视图层次结构中最底部视图的底部约束,而不是“安全区域”
希望这有助于某人..
你可以参考这个链接 - iOS/Swift - Hide/Show UITabBarController when scrolling down/up。为了获得更好的结果在隐藏标签栏后,不要忘记在viewdidLoad()中添加此行代码以删除黑屏。
if #available(iOS 11.0, *) {
self.myScroll.contentInsetAdjustmentBehavior = .never
}
斯威夫特3:
extension UITabBarController {
func setTabBarVisible(visible:Bool, duration: TimeInterval, animated:Bool) {
if (tabBarIsVisible() == visible) { return }
let frame = self.tabBar.frame
let height = frame.size.height
let offsetY = (visible ? -height : height)
// animation
UIViewPropertyAnimator(duration: duration, curve: .linear) {
self.tabBar.frame.offsetBy(dx:0, dy:offsetY)
self.view.frame = CGRect(x:0,y:0,width: self.view.frame.width, height: self.view.frame.height + offsetY)
self.view.setNeedsDisplay()
self.view.layoutIfNeeded()
}.startAnimation()
}
func tabBarIsVisible() ->Bool {
return self.tabBar.frame.origin.y < UIScreen.main.bounds.height
}
}
使用(如果例如self
是UITabBarController
):
self.setTabBarVisible(visible: false, duration: 0.3, animated: true)
Swift 2.x:
extension UITabBarController {
func setTabBarVisible(visible:Bool, duration: NSTimeInterval, animated:Bool) {
if (tabBarIsVisible() == visible) { return }
let frame = self.tabBar.frame
let height = frame.size.height
let offsetY = (visible ? -height : height)
// animation
UIView.animateWithDuration(animated ? duration : 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 < UIScreen.mainScreen().bounds.height
}
}
使用:
self.tabBarController?.setTabBarVisible(visible: false, duration: 0.3, animated: true)
以编程方式,将其添加到swift 4的下一个视图控制器。
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
tabBarController?.tabBar.isHidden = true
edgesForExtendedLayout = UIRectEdge.bottom
extendedLayoutIncludesOpaqueBars = true
}
并添加背景颜色
注意 - 此解决方案仅用于删除隐藏标签栏后留下的空白区域。
对于隐藏标签栏最好的解决方案是 - @Michael Campsall answer here
对此最简单的解决方案是更改视图(在我的情况下是tableView)底部约束,而不是使用BottomLayoutGuide给出底部约束,并使用superview。附上屏幕截图供参考。
下面的屏幕截图中显示的约束会产生问题,根据下一个屏幕截图进行更改。
删除空格的实际约束应该根据此(下面)截图。
关于this question的第三个答案以下列方式为我工作:
我的视图控制器上的代码
@IBAction func buttonPressed(sender: AnyObject) {
setTabBarVisible(!tabBarIsVisible(), animated: true)
}
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)
print ("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
}
}
}
func tabBarIsVisible() -> Bool {
return self.tabBarController?.tabBar.frame.origin.y < UIScreen.mainScreen().bounds.height
}
在故事板中:
然后你可以在里面有另一个视图(背景颜色为白色),约束拖尾和前导空间到superview以及布局指南的顶部和底部空间。
结果是:
我首选的方法是使用包装控制器。如果我想隐藏标签栏,我只需增加标签栏控制器的高度,从而有效地将标签栏移出屏幕。
使用此解决方案,您无需破解标签栏框架,也不需要依赖导航控制器推送动画:
import UIKit
class ViewController: UIViewController {
let tabController: UITabBarController = {
let tabController = UITabBarController()
// setup your tabbar controller here
return tabController;
}()
var tabbarHidden = false {
didSet {
var frame = self.view.bounds;
if (tabbarHidden) {
frame.size.height += self.tabController.tabBar.bounds.size.height;
}
self.tabController.view.frame = frame;
}
}
override func viewDidLoad() {
super.viewDidLoad()
// add the tab controller as child controller
addChildViewController(self.tabController)
self.tabController.view.frame = self.view.bounds
self.tabController.view.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
self.view.addSubview(self.tabController.view)
self.tabController.didMoveToParentViewController(self)
// for debugging
let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(switchTabbar))
self.tabController.view.addGestureRecognizer(tapRecognizer)
}
override func childViewControllerForStatusBarStyle() -> UIViewController? {
return self.tabController
}
override func childViewControllerForStatusBarHidden() -> UIViewController? {
return self.tabController
}
func switchTabbar() {
UIView.animateWithDuration(0.3) {
self.tabbarHidden = !self.tabbarHidden
}
}
}
对于那些喜欢以编程方式完成所有操作的人,将此行添加到不应该有tabBar的init
的ViewController
方法中:
hidesBottomBarWhenPushed = true