我如何在可可/ objective-c中获得触摸的位置？

#import <UIKit/UIKit.h>

@interface MyViewController : UIViewController

@end

@implementation MyViewController

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInView:self.view];
    NSLog(@"触摸位置: (%f, %f)", touchLocation.x, touchLocation.y);
}

@end

int main(int argc, char * argv[]) {
    @autoreleasepool {
        UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
        MyViewController *viewController = [[MyViewController alloc] init];
        window.rootViewController = viewController;
        [window makeKeyAndVisible];
    }
    return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}