在TextView中查找CGPoint子string的位置

我正在寻找创build一个SpriteKit节点定位在一个UITextView中的子string的位置。 我将如何检索CGPoint位置，以便我可以在那里定位SKNode？

let textFont = [NSFontAttributeName: UIFont(name: "GillSansMT", size: 30.0) ?? UIFont.systemFontOfSize(18.0)] attrString1 = NSMutableAttributedString(string: "My name is Dug.", attributes: textFont) textShown1 = CustomTextView(frame: CGRectMake(CGRectGetMidX(self.frame), 175 + (90 * paragraphNumber), CGRectGetWidth(self.frame) - 80, CGRectGetHeight(self.frame)-400)) textShown1.attributedText = attrString1 self.view?.addSubview(textShown1) 

Answer 1

你可以在UITextView上使用firstRectForRange(_:)方法

 let textFont = [NSFontAttributeName: UIFont(name: "GillSansMT", size: 30.0) ?? UIFont.systemFontOfSize(18.0)] let attrString1 = NSMutableAttributedString(string: "My name is Dug.", attributes: textFont) // range of substring to search let str1 = attrString1.string as NSString let range = str1.rangeOfString("name", options: nil, range: NSMakeRange(0, str1.length)) // prepare the textview let textView = UITextView(frame:CGRectMake(0,0,200,200)) textView.attributedText = attrString1 // you should ensure layout textView.layoutManager.ensureLayoutForTextContainer(textView.textContainer) // text position of the range.location let start = textView.positionFromPosition(textView.beginningOfDocument, offset: range.location)! // text position of the end of the range let end = textView.positionFromPosition(start, offset: range.length)! // text range of the range let tRange = textView.textRangeFromPosition(start, toPosition: end) // here it is! let rect = textView.firstRectForRange(tRange)