Question

我正在寻找一种方法来删除在Swift中创建的按钮数组。

我的项目是一个字谜游戏，其中一个单词被分解为字母，随机播放，然后在按钮中显示。这与下面的代码非常吻合。

唯一的问题是我想在显示新单词之前删除按钮，因此它们不会重叠（导致错误的用户界面）。所以我的任务就是：

检查包含字母的characterArray是否为空，或者是否为
如果为nil，则加载新单词
如果已有单词，则在添加新按钮（单词）之前删除按钮（单词）

@IBAction func shuffleString() { 
    txtFileArray = fileContent!.componentsSeparatedByString("\n")

    // 1. Shuffle the plist with the words to form anagrams from
    currentQuestion = Int(arc4random_uniform(UInt32(txtFileArray.count)))
    anagramString = txtFileArray.objectAtIndex(currentQuestion) as String

    var staticY: CGFloat = self.view.bounds.size.height / 9 * 1; // Static X for all buttons.
    var staticWidth: CGFloat = 46; // Static Width for all Buttons.
    var staticHeight: CGFloat = 46; // Static Height for all buttons.

    var staticPadding: CGFloat = 10; // Padding to add between each button.
    var characters: String? = anagramString

    // 2. Initialize the buttons for the letters
    var button = UIButton()

    // 3. Add the word to the characterArray
    var characterArray = Array(anagramString)

    /* HERE I NEED CONDITIONAL STATEMENT AS DESCRIBED IN MY QUESTION: */
    /* CHECK IF CHARACTERARRAY IS EMPTY, IF NOT REMOVE THE CURRENT BUTTONS */
    /* BEFORE ADDING NEW ONES */
    for (index, value) in enumerate(characterArray) {

        button.removeFromSuperview() // THE BUTTONS ARE NOT REMOVED
        println("Clear Tiles")
        println("index: \(index) and value: \(value)")
    }

    // 4. Add the word from the characterArray to corresponding amount of buttons
    for (index, value) in enumerate(characterArray) /* randomIndex */ {

        button = UIButton.buttonWithType(UIButtonType.System) as UIButton
        button = UIButton(frame:CGRectMake(0, 0, 44, 44))
        button.frame.origin.x = (CGFloat(index) * 45.0) + 100.0
        button.setTitleColor(UIColor.blackColor(), forState: .Normal)
        button.setBackgroundImage(UIImage(named:"Tile.png"), forState: .Normal)
        button.setTitle("\(value)", forState: .Normal)

        buttonSeriesArray.append(button)

        self.view.addSubview(button)
       // println("index: \(index) and value: \(value)")
    }

    println(characterArray)

}

Answer 1

您的代码被破坏了。首先，您创建一个按钮然后将其从superview中删除，但它没有分配给任何按钮。你就是在循环中做到这一点。

在Swift中删除UIButtons数组

1 个答案: