AutoHookExample

Sample project for creating a dynamic framework for method swizzling and code injection.

• Create a class that conforms to MBAutoHook
• Implement + (NSArray<NSString *> *)targetClasses to specify which classes you want to hook
• hook_ + method name for the method you want to hook, e.g. - (void)hook_viewDidLoad
• orig_ + method name as a placeholder for the original implementation, e.g. - (void)orig_viewDidLoad

@interface ViewControllerHook: UIViewController <MBAutoHook>
@end

@implementation ViewControllerHook

+ (NSArray<NSString *> *)targetClasses {
    return @[@"ViewController"];
}

- (void)hook_viewDidLoad {
    [self orig_viewDidLoad];
    self.view.backgroundColor = [UIColor redColor];
}

// MARK: Placeholder

- (void)orig_viewDidLoad { }

@end

Credits

John Coates for sharing his auto hook code. My implementation is slightly modified to properly work for class methods.