如何在iOS中隐藏动画标签栏？

Question

所以我有一个连接到IBAction的按钮。当我按下按钮时，我想用动画隐藏iOS应用程序中的标签栏。这个[self setTabBarHidden:hidden animated:NO];或这个[self.tabBarController setTabBarHidden:hidden animated:YES];不起作用。这是没有动画的代码：

- (IBAction)picture1:(id)sender {
    [self.tabBarController.tabBar setHidden:YES];
}

任何帮助将不胜感激：D

Answer 1

我尝试使用以下公式保持查看动画：

// pass a param to describe the state change, an animated flag and a completion block matching UIView animations completion 
- (void)setTabBarVisible:(BOOL)visible animated:(BOOL)animated completion:(void (^)(BOOL))completion {

    // bail if the current state matches the desired state
    if ([self tabBarIsVisible] == visible) return (completion)? completion(YES) : nil;

    // get a frame calculation ready
    CGRect frame = self.tabBarController.tabBar.frame;
    CGFloat height = frame.size.height;
    CGFloat offsetY = (visible)? -height : height;

    // zero duration means no animation
    CGFloat duration = (animated)? 0.3 : 0.0;

    [UIView animateWithDuration:duration animations:^{
        self.tabBarController.tabBar.frame = CGRectOffset(frame, 0, offsetY);
    } completion:completion];
}

//Getter to know the current state
- (BOOL)tabBarIsVisible {
    return self.tabBarController.tabBar.frame.origin.y < CGRectGetMaxY(self.view.frame);
}

//An illustration of a call to toggle current state
- (IBAction)pressedButton:(id)sender {
    [self setTabBarVisible:![self tabBarIsVisible] animated:YES completion:^(BOOL finished) {
        NSLog(@"finished");
    }];
}

Answer 2

不幸的是，我无法对HixField的答案发表评论，因为我没有足够的声誉，所以我不得不将其作为一个单独的答案。

他的答案是缺少movedFrameView的计算属性，即：

var movedFrameView:CGRect? {
  get { return objc_getAssociatedObject(self, &AssociatedKeys.movedFrameView) as? CGRect }
  set { objc_setAssociatedObject(self, &AssociatedKeys.movedFrameView, newValue, .OBJC_ASSOCIATION_COPY) }
}

Answer 3

这对我来说：[self.tabBar setHidden:YES]; 其中self是视图控制器，tabBar是tabBar的id。

Answer 4

使用故事板时，可以轻松设置View Controller以在推送时隐藏标签栏，在目标View Controller上选择此复选框：

Answer 5

Swift 3.0版，使用扩展名：

extension UITabBarController {

    private struct AssociatedKeys {
        // Declare a global var to produce a unique address as the assoc object handle
        static var orgFrameView:     UInt8 = 0
        static var movedFrameView:   UInt8 = 1
    }

    var orgFrameView:CGRect? {
        get { return objc_getAssociatedObject(self, &AssociatedKeys.orgFrameView) as? CGRect }
        set { objc_setAssociatedObject(self, &AssociatedKeys.orgFrameView, newValue, .OBJC_ASSOCIATION_COPY) }
    }

    var movedFrameView:CGRect? {
        get { return objc_getAssociatedObject(self, &AssociatedKeys.movedFrameView) as? CGRect }
        set { objc_setAssociatedObject(self, &AssociatedKeys.movedFrameView, newValue, .OBJC_ASSOCIATION_COPY) }
    }

    override open func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()
        if let movedFrameView = movedFrameView {
            view.frame = movedFrameView
        }
    }

    func setTabBarVisible(visible:Bool, animated:Bool) {
        //since iOS11 we have to set the background colour to the bar color it seams the navbar seams to get smaller during animation; this visually hides the top empty space...
        view.backgroundColor =  self.tabBar.barTintColor 
        // bail if the current state matches the desired state
        if (tabBarIsVisible() == visible) { return }

        //we should show it
        if visible {
            tabBar.isHidden = false
            UIView.animate(withDuration: animated ? 0.3 : 0.0) {
                //restore form or frames
                self.view.frame = self.orgFrameView!
                //errase the stored locations so that...
                self.orgFrameView = nil
                self.movedFrameView = nil
                //...the layoutIfNeeded() does not move them again!
                self.view.layoutIfNeeded()
            }
        }
            //we should hide it
        else {
            //safe org positions
            orgFrameView   = view.frame
            // get a frame calculation ready
            let offsetY = self.tabBar.frame.size.height
            movedFrameView = CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height + offsetY)
            //animate
            UIView.animate(withDuration: animated ? 0.3 : 0.0, animations: {
                self.view.frame = self.movedFrameView!
                self.view.layoutIfNeeded()
            }) {
                (_) in
                self.tabBar.isHidden = true
            }
        }
    }

    func tabBarIsVisible() ->Bool {
        return orgFrameView == nil
    }
}

• 这是基于Sherwin Zadeh在几个小时的游戏后的输入。
• 而不是移动tabbar本身它移动视图的框架，这有效地滑动tabbar很好地从屏幕的底部，但......
• ...的优势在于UITabbarcontroller内显示的内容也可以全屏显示！
• 请注意它也使用AssociatedObject功能将数据附加到UIView而不进行子类化，因此可以进行扩展（扩展不允许存储属性）

Answer 6

根据Apple文档，hidesBottomBarWhenPushed属性UIViewController，一个布尔值，指示当视图控制器被推送到导航控制器时，屏幕底部的工具栏是否被隐藏。

最顶层视图控制器上此属性的值确定工具栏是否可见。

隐藏标签栏的推荐方法如下

    ViewController *viewController = [[ViewController alloc] init];
    viewController.hidesBottomBarWhenPushed = YES;  // This property needs to be set before pushing viewController to the navigationController's stack. 
    [self.navigationController pushViewController:viewController animated:YES];

但是，请注意，此方法仅应用于相应的viewController，并且不会传播到其他视图控制器，除非您在将其推送到导航控制器的堆栈之前开始在其他viewControllers中设置相同的hidesBottomBarWhenPushed属性。

Answer 7

Swift版本：

@IBAction func tap(sender: AnyObject) {
    setTabBarVisible(!tabBarIsVisible(), animated: true, completion: {_ in })
}


// pass a param to describe the state change, an animated flag and a completion block matching UIView animations completion
func setTabBarVisible(visible: Bool, animated: Bool, completion:(Bool)->Void) {

    // bail if the current state matches the desired state
    if (tabBarIsVisible() == visible) {
        return completion(true)
    }

    // get a frame calculation ready
    let height = tabBarController!.tabBar.frame.size.height
    let offsetY = (visible ? -height : height)

    // zero duration means no animation
    let duration = (animated ? 0.3 : 0.0)

    UIView.animateWithDuration(duration, animations: {
        let frame = self.tabBarController!.tabBar.frame
        self.tabBarController!.tabBar.frame = CGRectOffset(frame, 0, offsetY);
    }, completion:completion)
}

func tabBarIsVisible() -> Bool {
    return tabBarController!.tabBar.frame.origin.y < CGRectGetMaxY(view.frame)
}

Answer 8

重写Sherwin Zadeh在Swift 4中的回答：

/* tab bar hide/show animation */
extension AlbumViewController {
    // pass a param to describe the state change, an animated flag and a completion block matching UIView animations completion
    func setTabBarVisible(visible: Bool, animated: Bool, completion: ((Bool)->Void)? = nil ) {

        // bail if the current state matches the desired state
        if (tabBarIsVisible() == visible) {
            if let completion = completion {
                return completion(true)
            }
            else {
                return
            }
        }

        // get a frame calculation ready
        let height = tabBarController!.tabBar.frame.size.height
        let offsetY = (visible ? -height : height)

        // zero duration means no animation
        let duration = (animated ? kFullScreenAnimationTime : 0.0)

        UIView.animate(withDuration: duration, animations: {
            let frame = self.tabBarController!.tabBar.frame
            self.tabBarController!.tabBar.frame = frame.offsetBy(dx: 0, dy: offsetY)
        }, completion:completion)
    }

    func tabBarIsVisible() -> Bool {
        return tabBarController!.tabBar.frame.origin.y < view.frame.maxY
    }
}

Answer 9

尝试在动画中设置tabBar的框架。请参阅this教程。

请注意，这样做是不好的做法，你应该在UIViewController推动时设置显示/隐藏tabBar，将属性hidesBottomBarWhenPushed设置为YES。

Answer 10

[Swift4.2]

刚为UITabBarController创建了一个扩展：

import UIKit

extension UITabBarController {
    func setTabBarHidden(_ isHidden: Bool, animated: Bool, completion: (() -> Void)? = nil ) {
        if (tabBar.isHidden == isHidden) {
            completion?()
        }

        if !isHidden {
            tabBar.isHidden = false
        }

        let height = tabBar.frame.size.height
        let offsetY = view.frame.height - (isHidden ? 0 : height)
        let duration = (animated ? 0.25 : 0.0)

        let frame = CGRect(origin: CGPoint(x: tabBar.frame.minX, y: offsetY), size: tabBar.frame.size)
        UIView.animate(withDuration: duration, animations: {
            self.tabBar.frame = frame
        }) { _ in
            self.tabBar.isHidden = isHidden
            completion?()
        }
    }
}

Answer 11

试过swift 3.0 / iOS10 / Xcode 8：

    self.tabBarController?.tabBar.isHidden = true

我显示控制器时设置它:(导航后返回时隐藏）

override func viewWillAppear(_ animated: Bool) {

        super.viewWillAppear(animated)
        self.tabBarController?.tabBar.isHidden = false

    }

    override func viewWillDisappear(_ animated: Bool) {
                super.viewWillDisappear(animated)
        self.tabBarController?.tabBar.isHidden = true

    }

BTW：如果显示或不显示，最好有一个标志来保存，因为其他通风口最终可以触发隐藏/显示