ios - 没有更多上下文，表达式类型不明确

Question

text.drawInRect(aRectangle, withFont: font, lineBreakMode: .UILineBreakModeTailTruncation, alignment: .Center)

我在 .UILineBreakModeTailTruncation 中收到错误...那么我该如何解决呢？？？ 我正在使用 Xcode 7，swift 2

我收到另一个错误，即: 'drawInRect(_:withFont:lineBreakMode:alignment:)' 不可用..我该如何解决？？

谢谢..!!!

Answer 1

您传递的枚举值不正确，您应该传递如下值:

text.drawInRect(aRectangle, withFont: font, lineBreakMode: .TailTruncation, alignment: .Center)

或

text.drawInRect(aRectangle, withFont: font, lineBreakMode: UILineBreakMode.TailTruncation, alignment: .Center)

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仅供引用

UILineBreakMode is deprecated (从 iOS 6 开始)，你应该使用 NSLineBreakMode反而。所以上面的代码改为:

text.drawInRect(aRectangle, withFont: font, lineBreakMode: .ByTruncatingTail, alignment: .Center)

或

text.drawInRect(aRectangle, withFont: font, lineBreakMode: NSLineBreakMode.ByTruncatingTail, alignment: .Center)