solo hijack ,

 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() debe llamarse una sola vez.

¿Cómo sé UITextSelectionView ?

Compruebe View Hierarchy ,

¿Cómo sé el método updateSelectionRects ?

a través del tiempo de runtime ,

import ObjectiveC ,

entonces,

 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) ?? " _ | _ ") } }

También puedes secuestrar, así

 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() debe llamarse solo una vez.

¿Qué es UITextLoupeInteraction ?

de la respuesta de @ dengST30.