Question

Xcode正在为missing argument for parameter textContainer行投放textShown1 = CustomTextView。我很好奇它为什么只在for循环内抛出错误，但在它之外却没有。

for i in 1...paragraphCount {
    // Missing 'argument textContainer in call below', various other errors like 'consuective statements on a line must be separated by ;'
    textShown1 = CustomTextView(frame: CGRect(x: 0, y: 125 + (50*i)), width: CGRectGetWidth(self.frame), height: CGRectGetHeight(self.frame)-400))

    paragraphs.append(textShown1)
    self.view?.addSubview(textShown1)

}

    textShown1 = CustomTextView(frame: CGRect(x: 0, y: 50, width: CGRectGetWidth(self.frame), height: CGRectGetHeight(self.frame)-400))

我认为它也可能导致问题不是CGFloat，但在尝试转换它之后仍然会抛出错误。我将CustomTextView更改为UITextView只是为了让代码更容易混淆：

for i in 1...8 {

    var converted: CGFloat = CGFloat(i)
    // Missing 'argument textContainer in call below', various other errors like 'consuective statements on a line must be separated by ;'
    textShown1 = UITextView(frame: CGRect(x: 0, y: (50 * converted)), width: CGRectGetWidth(self.frame), height: CGRectGetHeight(self.frame)-400)

    paragraphs.append(textShown1)
    self.view?.addSubview(textShown1)

}

Answer 1

该错误具有误导性。您的问题是i。这是一个Int。您必须将其强制转换为CGFloat才能使其正常运行。

var converted:CGFloat = CGFloat(i)
textShown1 = UITextView(frame: CGRectMake(0, 50 * converted, CGRectGetWidth(self.view.frame), CGRectGetHeight(self.view.frame) - CGFloat(400)))

Answer 2

CGRect(x: 0, y: 125 + (50*i)), width: CGRectGetWidth(self.frame), height: CGRectGetHeight(self.frame)-400)

应该是

CGRectMake(0, CGFloat(125 + (50*i)), CGRectGetWidth(self.view.frame), CGFloat(CGRectGetHeight(self.view.frame)-400))

For循环中的UITextView缺少参数

2 个答案: