iOS Hook系统类的办法，比如：UITextSelectionView

Posted 2022-11-30 hherima

        由于UITextSelectionView是系统的私有类，连头文件都没有。那么我们怎么hook它的方法呢。比如初始化方法initWithInteractionAssistant:

        找一个类的+load方法，比如UIView的load方法，

//步骤一
        Method originEat = class_getInstanceMethod(NSClassFromString(@"UITextSelectionView"), NSSelectorFromString(@"initWithInteractionAssistant:"));
        //步骤二
        Method swizzlingEat = class_getInstanceMethod([self class], @selector(initWithInteractionAssistant_MY:));
        //步骤三
        class_addMethod(NSClassFromString(@"UITextSelectionView"), @selector(initWithInteractionAssistant_MY:), method_getImplementation(originEat), method_getTypeEncoding(originEat));
        //步骤四
        method_exchangeImplementations(originEat, swizzlingEat);

 

-(instancetype)initWithInteractionAssistant_MY:(id)d
    //your code here
    return [self initWithInteractionAssistant_MY:d];