按钮文本更改后，Swift 2 iOS 9动画消失_Ios_Swift2

按钮文本更改后，Swift 2 iOS 9动画消失

ios swift2

按钮文本更改后，Swift 2 iOS 9动画消失,ios,swift2,Ios,Swift2,我有一个动画运行良好，直到我改变按钮文本从开始到停止。文本会更改，但动画本身会消失。我做错了什么 import UIKit class ViewController: UIViewController { var counter = 1 var timer = NSTimer() var isAnimating = false @IBOutlet weak var button: UIButton! @IBOutlet weak var fro

我有一个动画运行良好，直到我改变按钮文本从开始到停止。文本会更改，但动画本身会消失。我做错了什么

import UIKit class ViewController: UIViewController { var counter = 1 var timer = NSTimer() var isAnimating = false @IBOutlet weak var button: UIButton! @IBOutlet weak var frogsImage: UIImageView! @IBAction func updateImage(sender: AnyObject) { if isAnimating == false { timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: Selector("doAnimation"), userInfo: nil, repeats: true) isAnimating = true button.setTitle("Stop Jumping", forState: UIControlState.Normal) } else { timer.invalidate() isAnimating = false button.setTitle("Start Jumping", forState: UIControlState.Normal) } } override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. } func doAnimation() { if counter == 4 { counter = 1 } else { counter++ } frogsImage.image = UIImage(named: "frame\(counter).png" ) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } override func viewDidLayoutSubviews() { // Hiding off the screen frogsImage.center = CGPointMake(frogsImage.center.x - 400, frogsImage.center.y) } override func viewDidAppear(animated: Bool) { UIView.animateWithDuration(1) { () -> Void in self.frogsImage.center = CGPointMake(self.frogsImage.center.x + 400, self.frogsImage.center.y) } } } 导入UIKit 类ViewController:UIViewController{ 变量计数器=1 var timer=NSTimer（） var isAnimating=false @IBVAR按钮：UIButton！ @IBVAR frogsImage:UIImageView！ @iAction func updateImage（发件人：AnyObject）{ 如果isAnimating==false{ timer=NSTimer.scheduledTimerWithTimeInterval（0.1，目标：self，选择器：选择器（“doAnimation”），userInfo:nil，repeats:true） isAnimating=true 按钮.setTitle（“停止跳跃”，用于状态：uicontrol状态.正常） }否则{ timer.invalidate（） isAnimating=false 按钮.setTitle（“开始跳转”，用于状态：uicontrol状态.Normal） } } 重写func viewDidLoad（）{ super.viewDidLoad（） //加载视图后，通常从nib执行任何其他设置。 } func doAnimation（）{ 如果计数器==4{ 计数器=1 }否则{ 柜台++ } frogsImage.image=UIImage（名为：“frame\（counter）.png” ) } 重写函数didReceiveMemoryWarning（）{ 超级。我收到了记忆警告（） //处置所有可以重新创建的资源。 } 重写func viewdilayoutsubviews（）{ //躲开屏幕 frogsImage.center=CGPointMake（frogsImage.center.x-400，frogsImage.center.y） } 覆盖功能视图显示（动画：Bool）{ UIView.animateWithDuration（1）{（）->Void in self.frogsImage.center=CGPointMake（self.frogsImage.center.x+400，self.frogsImage.center.y） } } }

动画已停止，因为正在使计时器无效

使计时器无效后，应重新启动计时器。因此，您将再次运行动画

希望这有帮助。

动画停止，因为您正在使计时器无效

使计时器无效后，应重新启动计时器。因此，您将再次运行动画

希望这能有所帮助。

以下是一些我想做的不同的事情，但我没有在项目中运行它，所以我不能保证它都能工作

class ViewController: UIViewController {

    var counter = 1

    var timer = NSTimer()

    var isAnimating = false
    var didSetup = false
    var didAnimateIn = false

    @IBOutlet weak var button: UIButton!
    @IBOutlet weak var frogsImage: UIImageView!
    @IBAction func updateImage(sender: AnyObject) {

        if isAnimating == false {
            timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: Selector("doAnimation"), userInfo: nil, repeats: true)
            isAnimating = true
            button.setTitle("Stop Jumping", forState: UIControlState.Normal)

        } else {
            timer.invalidate()
            isAnimating = false
            button.setTitle("Start Jumping", forState: UIControlState.Normal)
        }

    }

    func doAnimation() {
        if counter == 4 {
            counter = 1
        } else {
            counter++
        }

        frogsImage.image = UIImage(named: "frame\(counter).png"
        )

    }

    override func viewDidLayoutSubviews() {
        // Change this to always call super first
        super.viewDidLayoutSubviews()

        // Only do this once 
        if !didSetup {
            didSetup = true
            frogsImage.center = CGPointMake(frogsImage.center.x - 400, frogsImage.center.y)
        }

    }

    override func viewDidAppear(animated: Bool) {
        // Change this to always call super
        super.viewDidAppear(animated)

        // Only do this once, after setup
        if didSetup && !didAnimateIn {
            didAnimateIn = true
            UIView.animateWithDuration(1) { () -> Void in
                self.frogsImage.center = CGPointMake(self.frogsImage.center.x + 400, self.frogsImage.center.y)
            }
        }
    }
}

这里有几件事我会做不同的，但我没有在一个项目中运行它，所以我不能保证它将所有的工作

class ViewController: UIViewController {

    var counter = 1

    var timer = NSTimer()

    var isAnimating = false
    var didSetup = false
    var didAnimateIn = false

    @IBOutlet weak var button: UIButton!
    @IBOutlet weak var frogsImage: UIImageView!
    @IBAction func updateImage(sender: AnyObject) {

        if isAnimating == false {
            timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: Selector("doAnimation"), userInfo: nil, repeats: true)
            isAnimating = true
            button.setTitle("Stop Jumping", forState: UIControlState.Normal)

        } else {
            timer.invalidate()
            isAnimating = false
            button.setTitle("Start Jumping", forState: UIControlState.Normal)
        }

    }

    func doAnimation() {
        if counter == 4 {
            counter = 1
        } else {
            counter++
        }

        frogsImage.image = UIImage(named: "frame\(counter).png"
        )

    }

    override func viewDidLayoutSubviews() {
        // Change this to always call super first
        super.viewDidLayoutSubviews()

        // Only do this once 
        if !didSetup {
            didSetup = true
            frogsImage.center = CGPointMake(frogsImage.center.x - 400, frogsImage.center.y)
        }

    }

    override func viewDidAppear(animated: Bool) {
        // Change this to always call super
        super.viewDidAppear(animated)

        // Only do this once, after setup
        if didSetup && !didAnimateIn {
            didAnimateIn = true
            UIView.animateWithDuration(1) { () -> Void in
                self.frogsImage.center = CGPointMake(self.frogsImage.center.x + 400, self.frogsImage.center.y)
            }
        }
    }
}

发生的事情是，你的图像又回到了400像素的左边。您可以通过将左移改为40px并运行应用程序来检查这一点。这是因为在多个实例中调用了

viewdilayoutsubviews

，并将图像的位置重置为最初指定的位置

换句话说，当

应用程序已打开

再次在动画之前

当按下按钮时我建议绕过它的方法是添加这样一个count变量

import UIKit

class ViewController : UIViewController {
    var viewCount = 0 //ADD THIS

    var counter = 1

    var timer = NSTimer()

    var isAnimating = false

    @IBOutlet weak var button: UIButton!

    @IBOutlet weak var frogsImage: UIImageView!

    @IBAction func updateImage(sender: AnyObject) {

        if isAnimating == false {
            timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: Selector("doAnimation"), userInfo: nil, repeats: true)
            isAnimating = true
            button.setTitle("Stop Jumping", forState: UIControlState.Normal)

        } else {
            timer.invalidate()
            isAnimating = false
            button.setTitle("Start Jumping", forState: UIControlState.Normal)
        }

    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    func doAnimation() {
        if counter == 4 {
            counter = 1
        } else {
            counter++
        }

        frogsImage.image = UIImage(named: "frame\(counter).png")
    }


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

    override func viewDidLayoutSubviews() {

        // ADD THIS IF BLOCK
        if viewCount < 2 {
            frogsImage.center = CGPointMake(frogsImage.center.x - 400, frogsImage.center.y)
            viewCount++
        }

    }

    override func viewDidAppear(animated: Bool) {
        UIView.animateWithDuration(1) { () -> Void in
            self.frogsImage.center = CGPointMake(self.frogsImage.center.x + 400, self.frogsImage.center.y)
        }
    }
}

导入UIKit
类ViewController:UIViewController{
var viewCount=0//添加此
变量计数器=1
var timer=NSTimer（）
var isAnimating=false
@IBVAR按钮：UIButton！
@IBVAR frogsImage:UIImageView！
@iAction func updateImage（发件人：AnyObject）{
如果isAnimating==false{
timer=NSTimer.scheduledTimerWithTimeInterval（0.1，目标：self，选择器：选择器（“doAnimation”），userInfo:nil，repeats:true）
isAnimating=true
按钮.setTitle（“停止跳跃”，用于状态：uicontrol状态.正常）
}否则{
timer.invalidate（）
isAnimating=false
按钮.setTitle（“开始跳转”，用于状态：uicontrol状态.Normal）
}
}
重写func viewDidLoad（）{
super.viewDidLoad（）
//加载视图后，通常从nib执行任何其他设置。
}
func doAnimation（）{
如果计数器==4{
计数器=1
}否则{
柜台++
}
frogsImage.image=UIImage（名为：“frame\（counter.png”）
}
重写函数didReceiveMemoryWarning（）{
超级。我收到了记忆警告（）
//处置所有可以重新创建的资源。
}
重写func viewdilayoutsubviews（）{
//添加此IF块
如果viewCount<2{
frogsImage.center=CGPointMake（frogsImage.center.x-400，frogsImage.center.y）
视图计数++
}
}
覆盖功能视图显示（动画：Bool）{
UIView.animateWithDuration（1）{（）->Void in
self.frogsImage.center=CGPointMake（self.frogsImage.center.x+400，self.frogsImage.center.y）
}
}
}

发生的情况是，您的图像再次向左返回400像素。您可以通过将左移改为40px并运行应用程序来检查这一点。这是因为在多个实例中调用了

viewdilayoutsubviews

，并将图像的位置重置为最初指定的位置

换句话说，当

应用程序已打开

再次在动画之前

当按下按钮时我建议绕过它的方法是添加这样一个count变量

import UIKit

class ViewController : UIViewController {
    var viewCount = 0 //ADD THIS

    var counter = 1

    var timer = NSTimer()

    var isAnimating = false

    @IBOutlet weak var button: UIButton!

    @IBOutlet weak var frogsImage: UIImageView!

    @IBAction func updateImage(sender: AnyObject) {

        if isAnimating == false {
            timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: Selector("doAnimation"), userInfo: nil, repeats: true)
            isAnimating = true
            button.setTitle("Stop Jumping", forState: UIControlState.Normal)

        } else {
            timer.invalidate()
            isAnimating = false
            button.setTitle("Start Jumping", forState: UIControlState.Normal)
        }

    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    func doAnimation() {
        if counter == 4 {
            counter = 1
        } else {
            counter++
        }

        frogsImage.image = UIImage(named: "frame\(counter).png")
    }


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

    override func viewDidLayoutSubviews() {

        // ADD THIS IF BLOCK
        if viewCount < 2 {
            frogsImage.center = CGPointMake(frogsImage.center.x - 400, frogsImage.center.y)
            viewCount++
        }

    }

    override func viewDidAppear(animated: Bool) {
        UIView.animateWithDuration(1) { () -> Void in
            self.frogsImage.center = CGPointMake(self.frogsImage.center.x + 400, self.frogsImage.center.y)
        }
    }
}

导入UIKit
类ViewController:UIViewController{
var viewCount=0//添加此
变量计数器=1
var timer=NSTimer（）
var isAnimating=false
@IBVAR按钮：UIButton！
@IBVAR frogsImage:UIImageView！
@iAction func updateImage（发件人：AnyObject）{
如果isAnimating==false{
timer=NSTimer.scheduledTimerWithTimeInterval（0.1，目标：self，选择器：选择器（“doAnimation”），userInfo:nil，repeats:true）
isAnimating=true
按钮。设置标题（“停止Jum