xcode 图像幻灯片 Swift ios
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/28689383/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Image Slideshow Swift ios
提问by JoshSGman
I'm new to ios development. I am trying to make a simple fullscreen image slide show. On swipe left, the slideshow should show the next image, and swipe right the slideshow should show the previous image.
我是 ios 开发的新手。我正在尝试制作一个简单的全屏图像幻灯片。向左滑动幻灯片应显示下一张图像，向右滑动幻灯片应显示上一张图像。
I have it working, however, if I swipe in quick succession, I get a blank screen, almost as if the animations aren't keeping up, and then when I wait a moment and swipe again the image views speed up into place and works normally again. Any idea what I'm doing wrong? What is the best practice when it comes to implementing an image carousel like this with a dynamic amount of images (here they're hardcoded)?
我有它的工作，但是，如果我快速连续滑动，我会得到一个空白屏幕，几乎就像动画没有跟上一样，然后当我等待片刻并再次滑动时，图像视图会加速到位并起作用又正常了。知道我做错了什么吗？在使用动态数量的图像（这里它们是硬编码的）实现这样的图像轮播时，最佳实践是什么？
import UIKit
var imageArr = ["imageOne.jpg", "imageTwo.jpg", "imageThree.jpg", "imageFour.jpg", "imageFive.jpg"]
var imageIndex = 0;
class ViewController: UIViewController {
var currImage = UIImageView()
var rightImage = UIImageView()
var leftImage = UIImageView()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
var bounds:CGRect = UIScreen.mainScreen().bounds
var width:CGFloat = bounds.size.width
var height:CGFloat = bounds.size.height
currImage.frame = CGRect(x: 0.0, y: 0.0, width: width, height: height)
currImage.image = UIImage(named: imageArr[imageIndex])
rightImage.frame = CGRect(x: width, y: 0.0, width: width, height: height)
rightImage.image = UIImage(named: imageArr[imageIndex + 1])
leftImage.frame = CGRect(x: -width, y: 0.0, width: width, height: height)
leftImage.image = UIImage(named: imageArr[imageArr.count - 1])
self.view.addSubview(currImage)
self.view.addSubview(rightImage)
self.view.addSubview(leftImage)
var swipeLeft = UISwipeGestureRecognizer(target: self, action: "handleSwipe:")
swipeLeft.direction = UISwipeGestureRecognizerDirection.Left
self.view.addGestureRecognizer(swipeLeft)
var swipeRight = UISwipeGestureRecognizer(target: self, action: "handleSwipe:")
swipeRight.direction = UISwipeGestureRecognizerDirection.Right
self.view.addGestureRecognizer(swipeRight)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
let transitionManager = TransitionManager()
func handleSwipe(gesture: UIGestureRecognizer) {
var bounds:CGRect = UIScreen.mainScreen().bounds
var width:CGFloat = bounds.size.width
var height:CGFloat = bounds.size.height
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
if (swipeGesture.direction == UISwipeGestureRecognizerDirection.Left ) {
UIView.animateWithDuration(0.5, delay: 0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0.2, options: UIViewAnimationOptions.CurveEaseIn, animations: {
self.currImage.frame = CGRect(x: -width, y: 0.0, width: width, height: height)
self.rightImage.frame = CGRect(x: 0.0, y:0.0, width: width, height: height)
}, completion: { finished in
if (!finished) { return }
imageIndex++
imageIndex = imageIndex <= imageArr.count-1 ? imageIndex : 0
var leftIndex = imageIndex - 1 < 0 ? imageArr.count - 1 : imageIndex - 1
self.leftImage.image = UIImage(named: imageArr[leftIndex])
self.leftImage.frame = CGRect(x: -width, y: 0.0, width: width, height: height)
var tempImg = self.currImage
self.currImage = self.rightImage
self.rightImage = tempImg
self.rightImage.frame = CGRect(x: width, y: 0.0, width: width, height: height)
var rightIndex = imageIndex + 1 > imageArr.count - 1 ? 0 : imageIndex + 1
self.rightImage.image = UIImage(named: imageArr[rightIndex])
})
}
if (swipeGesture.direction == UISwipeGestureRecognizerDirection.Right) {
UIView.animateWithDuration(0.5, delay: 0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0.2, options: UIViewAnimationOptions.CurveEaseIn, animations: {
self.currImage.frame = CGRect(x: width, y: 0.0, width: width, height: height)
self.leftImage.frame = CGRect(x: 0.0, y: 0.0, width: width, height: height)
}, completion: { finished in
imageIndex--
imageIndex = imageIndex < 0 ? imageArr.count - 1 : imageIndex
var rightIndex = imageIndex + 1 > imageArr.count - 1 ? 0 : imageIndex + 1
self.rightImage.image = UIImage(named: imageArr[rightIndex])
self.rightImage.frame = CGRect(x: width, y: 0.0, width: width, height: height)
var tempImg = self.currImage
self.currImage = self.tempImg
self.leftImage = tempCurr
self.leftImage.frame = CGRect(x: -width, y: 0.0, width: width, height: height)
var leftIndex = imageIndex - 1 < 0 ? imageArr.count - 1 : imageIndex - 1
self.leftImage.image = UIImage(named: imageArr[leftIndex])
})
}
}
}
}
Any help is much appreciated!
任何帮助深表感谢！
回答by Kawalpreet Kaur
@IBOutlet weak var imageView:UIImageView!
@IBOutlet 弱 var imageView:UIImageView！
var i=Int()
override func viewDidLoad() {
super.viewDidLoad()
Timer.scheduledTimer(timeInterval: 3.0, target: self, selector: #selector(imageChange), userInfo: nil, repeats: true)
// Do any additional setup after loading the view.
}
@objc func imageChange(){
self.imageView.image=images[i]
if i<images.count-1{
i+=1
}
else{
i=0
}
}
回答by eildiz
You can add collection view, add image in your custom collectionview cell, after that do checkedPaging Enabledon props panel for collectionview. Use timer for auto slide
您可以添加集合视图，在自定义集合视图单元格中添加图像，然后在属性面板上检查集合视图Paging Enabled。使用定时器进行自动滑动
回答by Simone
that s a lot of code and i am not very sure this is the best way. Did u try using a Collection View Controller?It works almost like a Table view,where u will assign to every cell an image from your array. Ps I'm new to iOS too ,but i m 100% sure you should use a collection view object in situations like this
有很多代码，我不太确定这是最好的方法。你试过使用集合视图控制器吗？它的工作原理几乎就像一个表格视图，你将从你的数组中为每个单元格分配一个图像。Ps 我也是 iOS 新手，但我 100% 确定你应该在这样的情况下使用集合视图对象
