objc Method Swap

objcmethodswap

@implementation _IDESwipeAnimationHostView (OverrideRightClick)

+ (void)load
{
    // The "+ load" method is called once, very early in the application life-cycle.
    // It's called even before the "main" function is called. Beware: there's no
    // autorelease pool at this point, so avoid Objective-C calls.
    SEL originalSEL = NULL;
    SEL swapSEL = NULL;
    Method originalMethod = NULL;
    Method swapMethod = NULL;
    
    originalSEL = sel_registerName("rightMouseDown:");
    swapSEL = sel_registerName("swap_rightMouseDown:");
    
    if (self && originalSEL && swapSEL) {
        
        originalMethod = class_getInstanceMethod(self, originalSEL);
        swapMethod = class_getInstanceMethod(self, swapSEL);
        
        if (originalMethod && swapMethod) {
            method_exchangeImplementations(originalMethod, swapMethod);
        }
    }
    
}

#pragma mark - Method Swizzling

- (void)swap_rightMouseDown:(id)event {
    // super call: self is super at runtime
    [self swap_rightMouseDown:event];
}