Question

您好我正在尝试从Label中找到角色的CGRect。我发现以下How do I locate the CGRect for a substring of text in a UILabel?有用，但代码在Objective C中。我尝试使用Swift语言。跟随Swift转换Objective C代码

var objLabel:UILabel = UILabel()

func getBoundingRectForCharacterRange(range:NSRange) -> CGRect {

    var objTextStorage = NSTextStorage(attributedString: objLabel.attributedText!)
    var objLayoutManager = NSLayoutManager()
    objTextStorage.addLayoutManager(objLayoutManager)

    var objTextContainer = NSTextContainer(size: CGSizeMake(100,100))
    objTextContainer.lineFragmentPadding = 0
    objLayoutManager.addTextContainer(objTextContainer)

    var objRange:NSRange!

    objLayoutManager.characterRangeForGlyphRange(range, actualGlyphRange: objRange)
    return objLayoutManager.boundingRectForGlyphRange(objRange, inTextContainer: objTextContainer)
}

我正面临以下错误说

can not convert value of type 'NSRange!' to expected argument type 'NSRangePointer' (aka 'UnsafeMutablePointer<_NSRange>')

请帮助我解决问题。

此外，我尝试从一个类似的问题answer进行跟踪，但它也无效

var range : NSRange?
doSomethingWithRangePointer(&range)

func doSomethingWithRangePointer(range : UnsafeMutablePointer<NSRange?>) {
    // Do stuff
}

Answer 1

将调用更改为objLayoutManager.characterRangeForGlyphRange（），如下所示：

objLayoutManager.characterRangeForGlyphRange(range, 
  actualGlyphRange: &objRange)

无法转换'NSRange！'类型的值预期参数类型'NSRangePointer'Swift

1 个答案: