iOS：可以在选项卡之间向左/向右滑动吗？
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iOS: Swipe left/right between tabs possible?
提问by user1689272
Is it possible to swipe left or right anywhere on the screen to switch tabs in iOS? Thanks
是否可以在屏幕上的任意位置向左或向右滑动以切换 iOS 中的选项卡？谢谢
Example 1: Switching between months on a calender by simply swiping left/right Example 2: start at 0:12 http://www.youtube.com/watch?v=5iX4vcsSst8
示例 1：只需向左/向右滑动即可在日历上的月份之间切换示例 2：从 0:12 开始http://www.youtube.com/watch?v=5iX4vcsSst8
回答by Sean Kladek
If you are using a tab bar controller, you could set up a swipe gesture recognizer on each tab's view. When the gesture recognizer is triggered, it can change the tabBarController.selectedTabIndex
如果您使用标签栏控制器，您可以在每个标签的视图上设置一个滑动手势识别器。当手势识别器被触发时，它可以改变tabBarController.selectedTabIndex
This effect will not be animated, but it will switch the tabs with a swipe gesture. This was approximately what I used when I had an app with a UITabBar with buttons on the left and right side and swipe gestures to change the active tab.
此效果不会动画化，但会通过滑动手势切换选项卡。当我有一个带有 UITabBar 的应用程序时，这大约是我使用的，该应用程序在左侧和右侧带有按钮，并通过滑动手势来更改活动选项卡。
- (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];
}
回答by Ali
Try this,
尝试这个，
- (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"];
}
回答by Kaunteya
Assuming you are using UITabBarConroller
假设您正在使用 UITabBarConroller
All your child ViewControllers can Inherit from a class that does all the heavy lifting for you.
您所有的子 ViewController 都可以从为您完成所有繁重工作的类继承。
This is how I have done it
这就是我所做的
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)
}
}
So all your viewcontrollers that are part of UITabControllers can inherit from SwipableTabVCinstead of UIViewController.
因此，作为 UITabControllers 一部分的所有视图控制器都可以继承SwipableTabVC而不是 UIViewController。
回答by cwRichardKim
I would recommend embedding the entire thing into a pageviewcontroller like so: https://github.com/cwRichardKim/RKSwipeBetweenViewControllers
我建议将整个内容嵌入到 pageviewcontroller 中，如下所示：https: //github.com/cwRichardKim/RKSwipeBetweenViewControllers
回答by DBD
Sure, it's possible.
当然，这是可能的。
Every screen would need to have a UISwipeGestureRecognizerfor the swipes, then make a call to the tab bar perform the desired action. Which could be anything from incrementing or decrementing the active tab to anything you want.
每个屏幕都需要有一个UISwipeGestureRecognizer用于滑动，然后调用选项卡栏执行所需的操作。这可以是从增加或减少活动选项卡到您想要的任何内容。
For the sake of code duplication prevention, you could create a custom UIViewControllerand have all your view controllers inherit from there (or a couple other ways).
为了防止代码重复，您可以创建一个自定义UIViewController并从那里继承所有视图控制器（或其他几种方式）。
