UIImageView content mode not scaling down image

0
votes

I am trying to load a large UIImage into a UIImageView without rescaling the image first.

This is what I currently have (where self.mediaView is my UIImageView):

self.mediaView.contentMode = UIViewContentModeScaleAspectFit;
self.mediaView.clipsToBounds = YES;
[self.mediaView setFrame:self.view.bounds];
NSLog(@"screen dimensions: %f x %f", _screenWidth, _screenHeight);
NSLog(@"frame size: %f x %f", self.mediaView.frame.size.width, self.mediaView.frame.size.height);
NSLog(@"image dimensions: %f x %f", self.selectedMedia.getView.image.size.width, self.selectedMedia.getView.image.size.height);
[self.mediaView setImage:self.selectedMedia.getView.image];

From my logs, I know the following:

screen dimensions: 320.000000 x 568.000000
frame size: 320.000000 x 460.000000
image dimensions: 1136.000000 x 852.000000

But when the UIImageView loads, the UIImage is cut off, so I can tell the UIImage isn't being scaled properly.

Any tips on how to fix this?

2
iosobjective-cuiimageviewuiimage
Your code seems correct so maybe the problem is with the imageview check with the view debugger if it exceeds the screen borders, also where are you running this method ? - Or Ron
@Or.Ron I tried the view debugger at your suggestion. When I selected the imageView, the dimensions are 320 x 460. But when I click "show clicked content" I can see that the image is still 1136x852 - scientiffic

2 Answers

0
votes

I had to set the exact width and height constraints in my storyboard (using autolayout) in order to ensure that the imageView would be constrained to a particular size).

0
votes

what does "image dimensions: 1136.000000 x 852.000000" mean?

I have two kinds of understanding.

  1. origal image's dimensions :1136.000000 x 852.000000
  2. [self.mediaView setImage:self.selectedMedia.getView.image] has been called,the image's dimensions:1136.000000 x 852.000000