iOS：可以在標籤頁之間左右滑動嗎？

Question

是否可以在屏幕上的任意位置向左或向右滑動以切換iOS中的選項卡？由於

例1：通過簡單地刷上一個公曆月之間切換左/右 例2：開始於0:12 http://www.youtube.com/watch?v=5iX4vcsSst8

Answer 1

當然，這是可能的。

每個屏幕都需要有一個UISwipeGestureRecognizer用於滑動，然後調用標籤欄執行所需的操作。這可能是任何東西從增加或減少活動選項卡到任何你想要的。

爲了防止代碼重複，您可以創建一個自定義的UIViewController並讓所有視圖控制器從那裏繼承（或其他方式）。

Answer 2

如果您使用的是標籤欄控制器，您可以在每個標籤的視圖上設置一個輕掃手勢識別器。當手勢識別器被觸發時，它可以改變tabBarController.selectedTabIndex

這個效果不會動畫化，但它會用滑動手勢切換選項卡。這大概就是我使用左右側帶有按鈕的UITabBar的應用程序，然後滑動手勢以更改活動選項卡。

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedRightButton:)]; 
    [swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft]; 
    [self.view addGestureRecognizer:swipeLeft]; 

    UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedLeftButton:)]; 
    [swipeRight setDirection:UISwipeGestureRecognizerDirectionRight]; 
    [self.view addGestureRecognizer:swipeRight]; 
} 

- (IBAction)tappedRightButton:(id)sender 
{ 
    NSUInteger selectedIndex = [rootVC.tabBarController selectedIndex]; 

    [rootVC.tabBarController setSelectedIndex:selectedIndex + 1]; 
} 

- (IBAction)tappedLeftButton:(id)sender 
{ 
    NSUInteger selectedIndex = [rootVC.tabBarController selectedIndex]; 

    [rootVC.tabBarController setSelectedIndex:selectedIndex - 1]; 
} 

Answer 3

我建議嵌入整個事情變成像這樣一個pageviewcontroller： https://github.com/cwRichardKim/RKSwipeBetweenViewControllers

Answer 4

試試這個，

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedRightButton:)]; 
    [swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft]; 
    [self.view addGestureRecognizer:swipeLeft]; 

    UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedLeftButton:)]; 
    [swipeRight setDirection:UISwipeGestureRecognizerDirectionRight]; 
    [self.view addGestureRecognizer:swipeRight]; 
} 

- (IBAction)tappedRightButton:(id)sender 
{ 
    NSUInteger selectedIndex = [rootVC.tabBarController selectedIndex]; 

    [self.tabBarController setSelectedIndex:selectedIndex + 1]; 

    //To animate use this code 
    CATransition *anim= [CATransition animation]; 
    [anim setType:kCATransitionPush]; 
    [anim setSubtype:kCATransitionFromRight]; 
    [anim setDuration:1]; 
    [anim setTimingFunction:[CAMediaTimingFunction functionWithName: 
            kCAMediaTimingFunctionEaseIn]]; 
    [self.tabBarController.view.layer addAnimation:anim forKey:@"fadeTransition"]; 
} 

- (IBAction)tappedLeftButton:(id)sender 
{ 
    NSUInteger selectedIndex = [rootVC.tabBarController selectedIndex]; 

    [self.tabBarController setSelectedIndex:selectedIndex - 1]; 

    CATransition *anim= [CATransition animation]; 
    [anim setType:kCATransitionPush]; 
    [anim setSubtype:kCATransitionFromRight]; 

    [anim setDuration:1]; 
    [anim setTimingFunction:[CAMediaTimingFunction functionWithName: 
           kCAMediaTimingFunctionEaseIn]]; 
    [self.tabBarController.view.layer addAnimation:anim forKey:@"fadeTransition"]; 
} 

Answer 5

假設你正在使用UITabBarConroller

所有孩子ViewControllers可以繼承一個爲你完成所有繁重工作的課程。

這是我如何做它

class SwipableTabVC : UIViewController { 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     let left = UISwipeGestureRecognizer(target: self, action: #selector(swipeLeft)) 
     left.direction = .left 
     self.view.addGestureRecognizer(left) 

     let right = UISwipeGestureRecognizer(target: self, action: #selector(swipeRight)) 
     right.direction = .right 
     self.view.addGestureRecognizer(right) 
    } 

    func swipeLeft() { 
     let total = self.tabBarController!.viewControllers!.count - 1 
     tabBarController!.selectedIndex = min(total, tabBarController!.selectedIndex + 1) 

    } 

    func swipeRight() { 
     tabBarController!.selectedIndex = max(0, tabBarController!.selectedIndex - 1) 
    } 
} 

所以所有的viewcontrollers是UITabControllers的部分可以從SwipableTabVC的UIViewController，而不是繼承。