CODEWITHSUNDEEP
iosobjective-cuiviewcgpoint
Teja Nandamuri
Teja Nandamuri

Reputation: 11201

How to get end CGPoint of the screen?

Is there a way to find the endpoint of the screen? Let's say a screen of size (100x100) have the midpoint at (50,) and starting point (0,) and the endpoint as (100,). I can hard code to get the end point based on the device screen size, but that would be a too much work based on assumptions.

I am making a custom UIView animation based on UIBezierPath.

Here is what I am trying to do:

enter image description here

As you can see the animation is stopped after it reaches some point.And I want this point to be the end of the screen,so that UIView is covered whole screen. To be more clear, I drag the UIView to point A, and it animates to point B (end point,so B>A)

I am not sure how to calculate B, so that when I drag UIView to A, it animates to the end of the screen (endpoint of the screen).

Here is the code to get better understanding:

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint touchLocation = [touch locationInView:self.dragView];

 if (touchLocation.x<250) {

        if (!startBackSlide) {
             _circleDragView.touchdragPoint=touchLocation.y;
            _circleDragView.dragToPoint=CGPointMake(touchLocation.x+40, touchLocation.y);
            [_circleDragView setNeedsDisplay];
            _savedPoint=touchLocation;
        }else{

            //move the top and bot points backwards along with slide
            [self animateCOmpleteBezier:touchLocation];

            _circleDragView.touchdragPoint=touchLocation.y;
            _circleDragView.dragToPoint=CGPointMake(touchLocation.x+54, touchLocation.y);
            [_circleDragView setNeedsDisplay];
            _savedPoint=touchLocation;

            if (touchLocation.x<20) {
                startBackSlide=NO;
                snapped=YES;
            }
        }

    }

    if (touchLocation.x>=250) {

        if (snapped) {
            snapped=NO;
            //move the top and bottom points to the specified point(In this case the end point)
        }

    }

}

-(void)animateCOmpleteBezier:(CGPoint) value{

    [UIView animateWithDuration:0.01 delay:0  options:UIViewAnimationOptionCurveEaseOut animations:^{
        _circleDragView.topWidthPoint=value.x-10;
        _circleDragView.botWidthPoint=value.x-10;
        [_circleDragView setNeedsDisplay];

    } completion:^(BOOL finished) {

    }];


}

Upvotes: 0

Views: 1447

Answers (1)

Alexander Perechnev
Alexander Perechnev

Reputation: 2837

The endpoint of screen is equal to it's width and height:

CGSize screenSize = [UIScreen mainScreen].bounds.size;
CGPoint endPoint = CGPointMake(screenSize.width, screenSize.height);

https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIScreen_Class/#//apple_ref/occ/instp/UIScreen/bounds

Upvotes: 2

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