Image Scale. #4

BhaveshDhaduk opened this Issue Mar 19, 2013 · 3 comments


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Can I bound image to not scale below to corp area, as of now i can scale image as smaller then corp area. that's why at the time I am corp the image black background will come with result image.

dmitric commented Mar 22, 2013

hey @googler2013 you most definitely can.

If you remove rotational abilities it's quite simple.

I added a simple method calls fixBounds which I call when there are no touches left. Shown below:

    CGFloat yOffset = 0;
    CGFloat xOffset = 0;

    if(self.imageView.frame.origin.x > 0){
        xOffset =  -self.imageView.frame.origin.x;
    }else if(self.imageView.frame.origin.x+self.imageView.frame.size.width < 320){
        xOffset = 320-(self.imageView.frame.origin.x+self.imageView.frame.size.width);

    if (self.imageView.frame.origin.y > self.cropRect.origin.y) {
        yOffset = -(self.imageView.frame.origin.y - self.cropRect.origin.y);
    }else if((self.imageView.frame.origin.y + self.imageView.frame.size.height) <
             (self.cropRect.origin.y + self.cropRect.size.height)){
        yOffset = self.cropRect.origin.y + self.cropRect.size.height - (self.imageView.frame.origin.y+self.imageView.frame.size.height);

    if(xOffset || yOffset){
        self.view.userInteractionEnabled = NO;
        CGAffineTransform transform =
                                   xOffset/self.scale, yOffset/self.scale);
        [UIView animateWithDuration:kAnimationIntervalTransform delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
            self.imageView.transform = transform;
        } completion:^(BOOL finished) {
            self.view.userInteractionEnabled = YES;

The other thing to keep in mind, is if you want landscape image to show up fitting tight in the cropRect, you should also add something along the lines of this to your reset method

if(aspect < 1){
        h = CGRectGetHeight(self.cropRect);
        w = h/aspect;

and make sure the view.layer.masksToBounds = YES otherwise you will see the landscape image stick out when you push it onto a navigation Controller

For remove rotation, i got the point and remove gesture.

Where I need to implement this methods fixBounds and the other aspect < 1.


heitorfr commented Jul 14, 2013

I've added a 'checkBounds' setting. It uses dmitric ideas with some modifications.

@heitorfr heitorfr closed this Jul 14, 2013

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