[英]How to Identify Tapped UIImage in UIImage array in Swift
I am populating UIImage array with code and adding them into UIScrollView successfully. 我用代码填充UIImage数组,并将它们成功添加到UIScrollView中。 I would like to identify the image tapped so I can run an action accordingly.
我想识别点击的图像,以便可以相应地执行操作。
I appreciate your guidance and time. 感谢您的指导和时间。
Here is the code I have so far: 这是我到目前为止的代码:
override func viewDidLoad() {
super.viewDidLoad()
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.imageTapped(_:)))
}
func loadImagePicker(){
var contentWidth: CGFloat = 0.0
let imageWidth: CGFloat = 100.0
let imageHeight: CGFloat = 100.0
for x in 0...2 {
let image = UIImage(named: "item\(x).png")
let imageView = UIImageView(image: image)
imageView.isUserInteractionEnabled = true
myData.images1.append(imageView)
var newX: CGFloat = 0.0
newX = 10 + imageWidth * CGFloat(x) + (10 * CGFloat(x))
contentWidth += newX
scrollView.addSubview(imageView)
imageView.frame = CGRect(x: newX, y: scrollView.frame.size.height, width: imageWidth, height: imageHeight)
imageView.contentMode = .scaleToFill
}
print(myData.images1.count)
scrollView.clipsToBounds = false
scrollView.contentSize = CGSize(width: contentWidth, height: scrollView.frame.size.height)
imagePickerView.isHidden = false
}
Add gesture recognizer to your imageView just like following: 将手势识别器添加到您的imageView中,如下所示:
//Instance Variable
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.imageTapped(_:)))
tapGestureRecognizer.numberOfTapsRequired = 1
tapGestureRecognizer.numberOfTouchesRequired = 1
func loadImagePicker(){
// .....
for 0..<2 { //Assuming there are two images
// .....
// .....
imageView.addGestureRecognizer(tapGestureRecognizer)
}
}
func imageTapped(_ sender: UITapGestureRecognizer) {
let tappedImageView = sender.view as! UIImageView
let index = tappedImageView.tag // Do anything with the index by using it in your array
}
Make your tapGestureRecognizer
global or move it to your loadImagePicker
function. 使
tapGestureRecognizer
全局化或将其移至loadImagePicker
函数。
After setting isUserInteractionEnabled
to true, add the gesture recogniser to the imageView
by calling imageView.addGestureRecognizer(tapGestureRecognizer)
. 设置完成后
isUserInteractionEnabled
为真,添加手势识别器到imageView
调用imageView.addGestureRecognizer(tapGestureRecognizer)
imageTapped
function which accepts a sender of type UITapGestureRecognizer
imageTapped
函数,该函数接受UITapGestureRecognizer
类型的发送者 sender as? UIImageView
sender as? UIImageView
调用为来窃听的UIImageView sender as? UIImageView
sender as? UIImageView
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