Xcode 变量+；insertText Swift deleteBackward（）+；插入文本（“insertText”）

我正在做一个定制键盘。我想要一个自动周期函数，但我的代码有一个错误。请帮我解决它

代码：

@IBAction func autoPeriod(button: UIButton) {
    (textDocumentProxy as UIKeyInput).deleteBackward() + insertText(". ")
}

@IBAction func autoPeriod(button: UIButton) {
    (textDocumentProxy as UIKeyInput).deleteBackward()
    (textDocumentProxy as UIKeyInput).insertText(".")
}

干杯

帕拉什

我想出来了：

代码：

@IBAction func autoPeriod(button: UIButton) {
    (textDocumentProxy as UIKeyInput).deleteBackward() + insertText(". ")
}

@IBAction func autoPeriod(button: UIButton) {
    (textDocumentProxy as UIKeyInput).deleteBackward()
    (textDocumentProxy as UIKeyInput).insertText(".")
}