我在9个相等空间的框架中有8个UIImageViews。触摸时，除两个视图（第一行）以外的所有视图均移至emptySpot。不知道为什么。
（作为一个旁注，我不知道为什么我的blockquote中的前几行代码没有像其他代码一样格式化/显示！！）
import UIKit
import Foundation
var tiledViewsStack = [UIImageView]()
var emptySpot = CGPoint()
class PhotoViewController: UIViewController,
UIImagePickerControllerDelegate, UINavigationControllerDelegate {
//Choose an image from Photo Library and display on screen in displayImageView
@IBOutlet weak var displayImageView: UIImageView!
@IBAction func choosePicFromLibrary(sender: AnyObject) {
let imagePicker: UIImagePickerController = UIImagePickerController()
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
imagePicker.delegate = self
imagePicker.modalPresentationStyle = UIModalPresentationStyle.Popover
if (imagePicker.popoverPresentationController != nil) {
imagePicker.popoverPresentationController!.sourceView = sender as! UIButton
imagePicker.popoverPresentationController!.sourceRect = (sender as! UIButton).bounds
}
presentViewController(imagePicker, animated: true, completion: nil)
}
@IBAction func takePhoto(sender: AnyObject) {
let imagePicker: UIImagePickerController = UIImagePickerController()
imagePicker.sourceType = UIImagePickerControllerSourceType.Camera
imagePicker.delegate = self
imagePicker.modalPresentationStyle = UIModalPresentationStyle.Popover
if (imagePicker.popoverPresentationController != nil) {
imagePicker.popoverPresentationController!.sourceView = sender as! UIButton
imagePicker.popoverPresentationController!.sourceRect = (sender as! UIButton).bounds
}
presentViewController(imagePicker, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
dismissViewControllerAnimated(true, completion: nil)
displayImageView.image = info[UIImagePickerControllerOriginalImage] as! UIImage!
}
func imagePickerControllerDidCancel(picker: UIImagePickerController) {
dismissViewControllerAnimated(true, completion: nil)
}
//Cut photo into 9 tiles
//Cut selected image into 9 pieces and add each cropped image to tileImageStack array
var tileImageStack = [AnyObject]()
var allCenters = [NSValue]()
@IBAction func randomize(sender: AnyObject) {
let selectedImageWidth = displayImageView.image!.size.width
let selectedImageHeight = displayImageView.image!.size.height
let tileSize = CGSizeMake(selectedImageWidth/3, selectedImageHeight/3)
for (var colI = 0; colI < 3; colI++)
{
for (var rowI = 0; rowI < 3; rowI += 1)
{
let tileRect = CGRectMake(CGFloat(rowI) * tileSize.width, tileSize.height * CGFloat(colI), tileSize.width, tileSize.height)
if let selectedImage = displayImageView.image
{
let tileImage = CGImageCreateWithImageInRect(selectedImage.CGImage, tileRect)
let aUItile = UIImage(CGImage: tileImage!)
tileImageStack.append(aUItile)
}
}
}
//Display tiles in order on screen, then mix them up randomly
let frameWidth = self.view.frame.width
let frameHeight = self.view.frame.height
var xCen = (frameWidth/3)/2
var yCen = (frameHeight/3)/2
var pieceNumber = 0
for (var v = 0; v < 3; v += 1)
{
for (var h = 0; h < 3; h += 1)
{
let tiledView = UIImageView(frame:CGRectMake(0, 0, frameWidth/3, (frameHeight)/3))
var curCenter = CGPointMake(xCen, yCen)
allCenters.append(NSValue(CGPoint: curCenter))
//tiledView.backgroundColor = UIColor.redColor()
tiledView.center = curCenter
tiledView.image = tileImageStack[pieceNumber] as? UIImage
tiledView.userInteractionEnabled = true
tiledViewsStack.append(tiledView)
self.view.addSubview(tiledView)
xCen += (frameWidth/3)
pieceNumber += 1
}
xCen = (frameWidth/3)/2
yCen += (frameHeight/3)
}
tiledViewsStack[0].removeFromSuperview()
tiledViewsStack.removeAtIndex(0)
//Now there are 8 imageViews in the tiledViewsStack array, and 9 centers stored in allCenters array.
var centersCopy = allCenters
var randLocInt = Int()
var randLoc = CGPoint()
for any in tiledViewsStack
{
randLocInt = Int(arc4random() % UInt32(centersCopy.count)) // 0, --- 8
randLoc = centersCopy[randLocInt].CGPointValue()
any.center = randLoc
centersCopy.removeAtIndex(randLocInt)
}
emptySpot = centersCopy[0].CGPointValue()
}
var tapCen = CGPoint();
var left = CGPoint();
var right = CGPoint();
var top = CGPoint();
var bottom = CGPoint();
var leftIsEmpty = false
var rightIsEmpty = false
var topIsEmpty = false
var bottomIsEmpty = false
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?)
{
let frameWidth = self.view.frame.width
let frameHeight = self.view.frame.height
let allTouches = event?.allTouches()
let myTouch = allTouches?.first
if myTouch!.view != self.view
{
tapCen = myTouch!.view!.center
left = CGPointMake(tapCen.x - (frameWidth/3), tapCen.y)
right = CGPointMake(tapCen.x + (frameWidth/3), tapCen.y)
top = CGPointMake(tapCen.x, tapCen.y - (frameHeight/3))
bottom = CGPointMake(tapCen.x, tapCen.y + (frameHeight/3))
if (emptySpot == left) {leftIsEmpty = true}
if (emptySpot == right) {rightIsEmpty = true}
if (emptySpot == top) {topIsEmpty = true}
if (emptySpot == bottom) {bottomIsEmpty = true}
if (leftIsEmpty || rightIsEmpty || topIsEmpty || bottomIsEmpty)
{
//UIView.animateWithDuration(0.5, animations: myTouch!.view!.center = emptySpot, completion: true)
UIView.animateWithDuration(0.5, delay: 0, options: UIViewAnimationOptions.TransitionNone, animations: { () -> Void in
myTouch!.view!.center = emptySpot
}, completion: { (finished: Bool) -> Void in
})
emptySpot = tapCen
leftIsEmpty = false; rightIsEmpty = false; topIsEmpty = false; bottomIsEmpty = false;
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
} }
最佳答案
如果使用自动布局，则移动视图的中心或框架通常无法按预期进行，因为约束会覆盖视图的位置。
（它一直起作用，直到某些原因导致视图的布局被更新为止。这时，约束将覆盖您所做的更改。）
使用自动布局时，您需要将出口添加到约束中，然后更改这些约束上的常量值才能移动视图。
对于您的代码，缩进> 4个空格是将文本块标记为代码的原因。您的前几行缩进不够。 （我修好了它。）
顺便说一句。没有理由在代码上使用块引号。选择代码，单击编辑器上的花括号代码按钮，它将代码缩进4个空格。
（我懒得删除代码行上所有不需要的“>”块引号前缀。您应该这样做。）