如果我点击Swift中的按钮，我该如何更改图像？ [英] how do i change an image if i click on a button in Swift?

问题描述

我是swift的新手。我有一个按钮和3个图像保存在阵列中。我想要的是通过单击按钮更改图像。

I am new to swift. I have a button and 3 images that are saved in the array. What I want is to change the images​ by clicking on the button.

let circleArray = ["circle-gray-big","circle-green-big","circle-red-big"]
@IBAction func carbsButton(_ sender: Any) {

}

推荐答案

Swift 3.0

全班级的声明，

let circleArray = ["circle-gray-big","circle-green-big","circle-red-big"]
var index = 0

在 UIImageView ：

@IBOutlet var imageView: UIImageView! //Global

@IBAction func carbsButton(_ sender: Any) {

 self.index = (self.index >= self.circleArray.count-1) ? 0 : self.index+1
 self.imageView.image = UIImage(named:circleArray[index])
}

在 UIButton

In UIButton

更改 中的任何> carbsButton（_ sender：Any）到 carbsButton（_ sender：UIButton）。完成以下代码后，

Change Any in carbsButton(_ sender: Any) to carbsButton(_ sender: UIButton). After do like below code,

@IBAction func carbsButton(_ sender: UIButton) {
  self.index = (self.index >= self.circleArray.count-1) ? 0 : self.index+1
   sender.setImage(UIImage(named:circleArray[index]), for: .normal)//Button
}

在 UIImageView和UIButton ：

In UIImageView and UIButton:

let circleArray = ["circle-gray-big","circle-green-big","circle-red-big"]
var index = 0

@IBOutlet var imageView: UIImageView!    
@IBAction func carbsButton(_ sender: UIButton) {

    self.index = (self.index >= self.circleArray.count-1) ? 0 : self.index+1

    self.imageView.image = UIImage(named:circleArray[index]) //imageView
    sender.setImage(UIImage(named:circleArray[index]), for: .normal)//Button
}

示例输出：

sender.setBackgroundImage(UIImage(named:circleArray[index]), for: .normal)

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