이벤트 및 제스처

code
보기를 손가락에 따라 움직이게 하다
이전에 CGPoint 속성 설정

@property (nonatomic, assign) CGPoint myPoint;

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [super touchesBegan:touches withEvent:event];
    //         
    // 1.   touch  
    UITouch *touch = [touches anyObject];
    self.myPoint = [touch locationInView: self];

}

- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    [super touchesMoved:touches withEvent:event];
    UITouch *touch = [touches anyObject];
    CGPoint newPoint = [touch locationInView: self];
    //           
    CGFloat x = newPoint.x - self.myPoint.x;
    CGFloat y = newPoint.y - self.myPoint.y;
    self.center = CGPointMake(self.center.x + x , self.center.y + y);
}

이벤트
터치

- (void) touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [super touchesBegan:touches withEvent:event];
    NSLog(@"    ");
    //     textField       ==》     ，    

}

- (void) touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [super touchesEnded:touches withEvent:event];
    NSLog(@"    ");
}

- (void) touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [super touchesCancelled:touches withEvent:event];
    NSLog(@"     ");
}

- (void) touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [super touchesMoved:touches withEvent:event];
    NSLog(@"    ");
}

흔들다
흔들어 봐. 시작.

- (void) motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {
    [super motionBegan:motion withEvent:event];

}

흔들어서 끝.

- (void) motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event {
    [super motionEnded:motion withEvent:event];

}

손짓
그림에 제스처를 추가하는 등 동작을 하려면 먼저 대상의 사용자와 상호작용을 켜야 한다

self.viewNeedToAddGesture.userInteractionEnabled = YES;

살살

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(tapAction:)];
    [self.viewNeedToTap addGestureRecognizer: tap];
    [tap release];

- (void) tapAction: (UITapGestureRecognizer *) tap {
    NSLog(@"      ");
} 

property

numberOfTapsRequired tap

numberOfTouchesRequired

길게 누르다

    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)];
    [self.viewNeedToLongPress addGestureRecognizer: longPress];
    [longPress release];

- (void) longPressAction: (UITapGestureRecognizer *)longPress {
    //                   
    if (longPress.state == UIGestureRecognizerStateBegan) {
        NSLog(@"      ");
    }
}

property

minimumPressDuration

allowableMovement

빙글빙글 돌다

    UIRotationGestureRecognizer *rotate = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotateAction:)];
    [self.viewNeedToRotate addGestureRecognizer: rotate];
    [rotate release];

- (void) rotateAction: (UIRotationGestureRecognizer *)rotate {
    //     ，       
    UIImageView *viewNeedToRotate = (UIImageView *)rotate.view;
    //        
    self.viewNeedToRotate.transform = CGAffineTransformMakeRotation(rotate.rotation);
}

반죽하다

    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];
    [self.viewNeedToPinch addGestureRecognizer: pinch];
    [pinch release];

- (void) pinchAction: (UIPinchGestureRecognizer *)pinch {
    self.viewNeedToPinch.transform = CGAffineTransformMakeScale(pinch.scale, pinch.scale);
}

잡아당기다

    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
    [self.viewNeedToPan addGestureRecognizer: pan];
    [pan release];

첫번째 방법

- (void) pan: (UIPanGestureRecognizer *) pan {
    //        
    CGPoint point = [pan translationInView:pan.view];
    pan.view.transform = CGAffineTransformTranslate(pan.view.transform, point.x, point.y);
    [pan setTranslation:CGPointZero inView:pan.view];
}

두 번째 방법

- (void) pan: (UIPanGestureRecognizer *) pan {
    //        
    CGPoint point = [pan translationInView:pan.view];
    self.viewNeedToPan.center = CGPointMake(self.viewNeedToPan.center.x + point.x, self.viewNeedToPan.center.y +point.y);
    [pan setTranslation:CGPointZero inView:self.viewNeedToPan];
}

보통 이렇게 써요.

- (void) panAction: (UIPanGestureRecognizer *) pan {
    if (pan.state == UIGestureRecognizerStateBegan) {

    } else if (pan.state == UIGestureRecognizerStateChanged) {
        CGPoint point = [pan translationInView:pan.view];
        pan.view.transform = CGAffineTransformTranslate(pan.view.transform, point.x, point.y);
        [pan setTranslation:CGPointZero inView:pan.view];
    } else {
        //     
        pan.view.transform = CGAffineTransformIdentity;
    }
}

가볍게 쓸다

    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget: self action:@selector(swipeAction:)];
    [self.viewNeedToSwipe addGestureRecognizer: swipe];
    [swipe release];

- (void) swipe: (UISwipeGestureRecognizer *) swipe {
    if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) {
        NSLog(@"left");
    } else {
        NSLog(@"other direction");
    }
}

property

direction , . ,

화면 경계 제스처
UIScreenEdgePanGestureRecognizer