Question

这是a previous answer of mine对问题Detecting taps on attributed text in a UITextView in iOS的补充问题。

我使用Xcode 7.1.1和iOS 9.1重新测试了以下代码，它与我链接的答案中描述的设置一起正常工作。

import UIKit
class ViewController: UIViewController, UIGestureRecognizerDelegate {

    @IBOutlet weak var textView: UITextView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Create an attributed string
        let myString = NSMutableAttributedString(string: "Swift attributed text")

        // Set an attribute on part of the string
        let myRange = NSRange(location: 0, length: 5) // range of "Swift"
        let myCustomAttribute = [ "MyCustomAttributeName": "some value"]
        myString.addAttributes(myCustomAttribute, range: myRange)

        textView.attributedText = myString

        // Add tap gesture recognizer to Text View
        let tap = UITapGestureRecognizer(target: self, action: Selector("myMethodToHandleTap:"))
        tap.delegate = self
        textView.addGestureRecognizer(tap)
    }

    func myMethodToHandleTap(sender: UITapGestureRecognizer) {

        let myTextView = sender.view as! UITextView
        let layoutManager = myTextView.layoutManager

        // location of tap in myTextView coordinates and taking the inset into account
        var location = sender.locationInView(myTextView)
        location.x -= myTextView.textContainerInset.left;
        location.y -= myTextView.textContainerInset.top;

        // character index at tap location
        let characterIndex = layoutManager.characterIndexForPoint(location, inTextContainer: myTextView.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)

        // if index is valid then do something.
        if characterIndex < myTextView.textStorage.length {

            // print the character index
            print("character index: \(characterIndex)")

            // print the character at the index
            let myRange = NSRange(location: characterIndex, length: 1)
            let substring = (myTextView.attributedText.string as NSString).substringWithRange(myRange)
            print("character at index: \(substring)")

            // check if the tap location has a certain attribute
            let attributeName = "MyCustomAttributeName"
            let attributeValue = myTextView.attributedText.attribute(attributeName, atIndex: characterIndex, effectiveRange: nil) as? String
            if let value = attributeValue {
                print("You tapped on \(attributeName) and the value is: \(value)")
            }

        }
    }
}

但是，如果UITextView设置已更改，以便它既可编辑又可选择

然后这将导致键盘显示。显示键盘后，不再调用tap事件处理程序。在键盘显示时可以做些什么来检测属性文本上的点击？

更新

虽然这里的代码是在Swift中，但最初提出这个问题的人（在我上面链接的答案的评论中）正在使用Objective-C。因此，我很乐意接受Swift或Objective-C中的答案。

Answer 1

In your UITextView's controller,you can implement UITextViewDelegate , Then override method

-(BOOL)textViewShouldBeginEditing:(UITextView *)textView{
}

Inside this method you can access the textView's selectedRange,which should also be the "tap range" of your attributed text. Then return true / false depending on your needs.

在键盘显示时检测UITextView中属性文本的点击

1 个答案: