想要通过快速滑动手势来在选项卡栏之间导航 [英] want to navigate between tab bars by using swipe gesters in swift

问题描述

我想使用滑动手势在选项卡栏控制器之间导航，同时保留默认选项卡栏.我使用了这段代码，但显示了一个错误.

I want to use a swipe gesture to navigate between tab bar controllers while keep the default tab bars. I used this code but shows an error.

import UIKit

 class FirstViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()


        var leftSwipe = UISwipeGestureRecognizer(target: self, action: Selector("handleSwipes:"))


        leftSwipe.direction = .Left


        view.addGestureRecognizer(leftSwipe)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.

        func handleSwipes(sender:UISwipeGestureRecognizer) {
            if (sender.direction == .Left) {

                let storyboard = UIStoryboard(name: "Main", bundle: nil)
                let vc = storyboard.instantiateViewControllerWithIdentifier("SecondViewController") as! UIViewController
                self.presentViewController(vc, animated: false, completion: nil)

            }

            if (sender.direction == .Right) {

            }
        }


    }


}

推荐答案

您的函数 handleSwipes 必须是类级别的函数，而不是另一个函数的内部函数:

Your function handleSwipes must be a class level function, not an inner function of another function:

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.

    // remove the func from here
}

func handleSwipes(sender:UISwipeGestureRecognizer) {
    if (sender.direction == .Left) {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewControllerWithIdentifier("SecondViewController") as! UIViewController
        self.presentViewController(vc, animated: false, completion: nil)
    }

    if (sender.direction == .Right) {

    }
}

这是我可以看到的明显错误.您应该始终将错误消息和问题一起发布，以提高答案的质量.

That is the obvious error I can see. You should always post your error message with your questions to improve the quality of answers.

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