How disable Copy, Select All in UITextView using swift 4.2?

Question

How disable Copy, Select All in UITextView, But i need link is clickable in UITextview.

Here is all action disable, But selection is allow. I need only clickable link.

override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {

        return false
}

You can disable selection with textView.isSelectable = false. if you make it not isSelectable, links also does not work. Apple says that "This property controls the ability of the user to select content and interact with URLs and text attachments. The default value is YES." — KingHodor, Feb 01 '19 at 07:49
@Digvijay did you manage to solve this? I am in similar situation, I want to disable all actions, but enable links / emails etc... — MegaManX, May 09 '19 at 14:29

score 0 · Answer 1 · answered Oct 28 '21 at 03:16

just hijack it,

func swizzle() {
    guard let cls = NSClassFromString("UITextSelectionView") else { return }
    let originalSelector = NSSelectorFromString("updateSelectionRects")
    let swizzledSelector = #selector(UIView.updateSelectionRectsHijack)
    let originMethod = class_getInstanceMethod(cls, originalSelector)
    let swizzleMethod = class_getInstanceMethod(UIView.self, swizzledSelector)
    if let swizzledMethod = swizzleMethod, let originalMethod = originMethod{
        method_exchangeImplementations(originalMethod, swizzledMethod)
    }
}

extension UIView{
    @objc func updateSelectionRectsHijack(){ }
}

swizzle() should be call once only.

How I know UITextSelectionView ?

Check View Hierarchy,

How I know method updateSelectionRects ?

via runtime,

import ObjectiveC ,

then,

        var count: UInt32 = 0
        guard let methodArr = class_copyMethodList(NSClassFromString("UITextSelectionView"), &count) else { return }
        
        let cnt = Int(count)
        for i in 0..<cnt{
            let method = methodArr[i]
            let name = method_getName(method)
            if let type = method_getTypeEncoding(method){
                print(name, String(utf8String: type) ?? " _ | _ ")
            }
        }

score 0 · Answer 2 · answered Oct 28 '21 at 06:59

You can also hijack, like this

let hijackInvocation: @convention(block) (Unmanaged<NSObject>, AnyObject) -> Void = { objectRef, invocation in
    
}


func swizzle() {

    guard let cls = NSClassFromString("UITextLoupeInteraction") else { return }
    let originalSelector = NSSelectorFromString("loupeGesture:")
    let originMethod = class_getInstanceMethod(cls, originalSelector)
    if let originM = originMethod{
        let encode = method_getTypeEncoding(originM)
        class_replaceMethod(cls, originalSelector, imp_implementationWithBlock(hijackInvocation as Any), encode)
    }
}

swizzle() should be call just once.

what is UITextLoupeInteraction ?

from @dengST30's answer.

How disable Copy, Select All in UITextView using swift 4.2?

2 Answers2