【已解决】swift中动态计算文字大小

swift中想要动态计算text文字的大小

搜：

swift calculate UItext size

参考：

ios – Calculating UILabel Text Size – Stack Overflow

ios – Adjust UILabel height to text (Swift) – Stack Overflow

搜：

swift calculate UITextView size

参考：

dynamic – How do I size a UITextView to its content on iOS 7? – Stack Overflow

暂时用的是：

        //TODO: add support for other device type
        //current only for iPhone 6
        let singleLineMaxWidth = UIScreen.mainScreen().bounds.width * 0.6
        print("singleLineMaxWidth=\(singleLineMaxWidth)")
        let realTextSize = self.displayTextView!.sizeThatFits(CGSize(width: singleLineMaxWidth, height: CGFloat.max))
        print("realTextSize=\(realTextSize)")

输出：

singleLineMaxWidth=225.0
realTextSize=(221.5, 88.0)

后来整理出一个函数了：

  static func calcRealTextSize(text:String, font:UIFont) -> CGSize {
        let singleLineMaxWidth = UIScreen.mainScreen().bounds.width * 0.6
        print("singleLineMaxWidth=\(singleLineMaxWidth)")
        let tmpTextView = UITextView(frame: CGRectZero)
        tmpTextView.font = font
        tmpTextView.text = text
        let realTextSize = tmpTextView.sizeThatFits(CGSize(width: singleLineMaxWidth, height: CGFloat.max))
        print("calculated realTextSize=\(realTextSize)")
       
        return realTextSize
    }

调用举例：

let text:String ＝ “输入你要测试的内容，可长可短”
calcRealTextSize(text, font: UIFont.systemFontOfSize(12))

更多函数可参考：

https://github.com/crifan/crifanLib/tree/master/swift

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