When i try to add image in imageView, it might be got stretch. My imageView size is fixed.
So, i add like as follow:
[imgView setContentMode:UIViewContentModeScaleAspectFit];
But if the image is sometimes cut off, small. So, image view got blank view above the image if image is small.
How can I take image as per image view without pixelated or stretch??
try [[yourimageview layer] setmasktobounds:yes];
UIViewContentModeCenter
Centers the content in the view’s bounds, keeping the proportions the
same.
UIViewContentModeScaleAspectFill
Just Check For maximum size of image and if its small then adjust size of imageview according to image.
here image is UIImage which is actually image to set on UIImageView
if(img.size.width < imgView.superview.frame.size.width ||
img.size.height < imgView.superview.frame.size.height)
{
[imgView setFrame:CGRectMake(0,0,img.size.width,img.size.height)];
[imgView setCenter:imgView.superview.center];
}
[imgView setContentMode:UIViewContentModeScaleAspectFit];
Related
I am generating PDF with image and problem is that
[imageview.image drawInRect:CGRectMake(0, 0, 100, 100)];
in generated PDF my image got stretched to size we define in CGRectMake so how can my image set to Aspect Fit not UIImageView ?
my size is fixed 100*100 in PDF but image need to aspectFit
Any help ?
This is what you need to do. It will maintain the aspect ratio of whatever you want to add in a block.
Calculate the size of the image and then add in the CGRect.
CGRect AVMakeRectWithAspectRatioInsideRect(CGSize aspectRatio, CGRect boundingRect);
For more information check this documentation
you can try to set contentmode of your imageview , where the content of view(image) changes when views bound changes
for ex:
imageView.contentMode = UIViewContentModeScaleAspectFit;
Refer:
contentmode in apple documentation
I added a uiview as a subview on a view controller programmatically (called contentView). I also added an image on that uiview programmatically. Every time I run the app on the iPad the image is stretched! How do I fix the image so that it fits the iPad screen but doesn't stretch the image? I know the drawInRect is what is stretching the image. So how do I fix that?
Here is my code:
UIGraphicsBeginImageContextWithOptions(self.contentView.bounds.size, self.contentView.opaque, 0.0);
[[UIImage imageNamed:#"menu image 2.JPG"] drawInRect:self.contentView.bounds];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[self.contentView addSubview:imageView];
UIImageView has a property called contentMode which determines how the image layout is handled in the view context. contentMode is of type UIViewContentMode.
The default value is UIViewContentModeScaleToFill which stretches the image without respecting the aspect ratio. I am assuming it is the changing aspect ratio that is causing the issue.
If you wish to scale the image, but keep the aspect ratio, you have two options:
UIViewContentModeScaleAspectFit: This will show the image scaled to fill the view, but not clip any contents (if the aspect ratio doesn't match view size, it will show either horizontal or vertical bands)
UIViewContentModeScaleAspectFill: This will scale the image to fill the view entirely, without any bands - this will result in content being clipped if the image ratio doesn't match the view ratio.
To set the contentMode on the image view in Objective-C, use the following syntax:
UIImage *image = [UIImage imageNamed:#"menu image 2.JPG"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.contentMode = UIViewContentModeScaleAspectFill;
...
You should not need to use the custom context drawing for this to work anymore (thanks to Losiowaty for asking me about this).
Change code as below
UIImage *image = [UIImage imageNamed:#"menu image 2.JPG"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.contentMode = UIViewContentModeScaleAspectFit;
[self.contentView addSubview:imageView];
I guess your self.contentView.bounds is not having the same aspect ratio as your menu image 2.JPG . For an experiment, please try looking at the menu image 2.JPG's resolution. For example if it is 300x150, it's aspect ratio is (300/150 = 2:1). Set your self.contentView.bounds to this aspect ratio and draw the image and check the results. It will not stretch.
Please add this Single Line of code in your project
yourImage .contentMode = UIViewContentModeScaleAspectFit;
I've got a UIImageView which has a height greater than its UIImage. It is scaling the image to it's width, but since it's height is greater, it is showing the rest of the UIImageView as transparent (what you would expect from UIViewContentModeScaleAspectFit, which is what the UIImageView's contentMode is set to)
However, it is making the top and bottom of the UIImage transparent, basically, positioning the image in the center of itself. How can I get it to position itself at the top? When I use UIViewContentModeTop, it makes the image too large, so that doesn't work for me. I want some sort of way to scale it just as it does with UIVIewContentModeScaleAspectFill but tell it to also position the scaled image at the top of itself. Anyone have any ideas on how to do that?
I would also be able to fix the issue by just trimming the UIImageView's height to be equal to what the UIImage is once it's been stretched to the boundaries of its superview, but that seems like a more complex solution.
try something like,
UIImage *img = [UIImage imageNamed#"yourImageName.jpeg"];
yourImageView.contentMode = UIViewContentModeScaleAspectFit;
yourImageView.clipsToBounds = YES;
[yourImageView setImage:img];
I'm facing a really weird problem with UIImageView, I was trying to set an image - which created by take the screenshot of the current view - to an ImageView with content mode is UIViewContentModeScaleAspectFit.
It worked fine when I set the image by the interface builder in the xib file or when I set the image created by [UIImage imageNamed:]. They both worked fine with UIViewContentModeScaleAspectFit.
But when I take the snap shot of a view and set the image to the image view, the image did not fit to the UIImageView. I've tried all the solutions I found on here like .ClipsToBound = YES but they didn't work at all. I'm really confused by now.
Here's the code when I take the screen shot and create the UIImage:
- (UIImage *)screenshotWithRect:(CGRect)captureRect
{
CGFloat scale = [[UIScreen mainScreen] scale];
UIImage *screenshot;
UIGraphicsBeginImageContextWithOptions(self.frame.size, NO, scale);
CGContextClipToRect (UIGraphicsGetCurrentContext(),captureRect);
{
if(UIGraphicsGetCurrentContext() == nil)
{
NSLog(#"UIGraphicsGetCurrentContext is nil. You may have a UIView (%#) with no really frame (%#)", [self class], NSStringFromCGRect(self.frame));
}
else
{
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
screenshot = UIGraphicsGetImageFromCurrentImageContext();
}
}
UIGraphicsEndImageContext();
return screenshot;
}
And when I set the image to the image view
UIImage* snap = [[UIImage alloc] init];
// start snap shot
UIView* superView = [self.view superview];
CGRect cutRect = [superView convertRect:self.cutView.frame fromView:_viewToCut];
snap = [superView screenshotWithRect:cutRect];
[self.view addSubview:self.editCutFrameView];
// end snap shot -> show edit view
[self.editCutFrameView setImage:snap];
Here's a picture compare the 2 results:
Many thanks for your help.
UPDATE: As #Saheb Roy mentioned about the size, I checked the image size and it's about 400x500px and the thumbnail.png's size is 512x512px so I think it's not about the size of the image.
This is because in the second case, the snapshot image is itself exactly that size as you can see. Hence the image is not being stretched or fitted accordingly.
Earlier images are fitting to screen accordingly as the images were bigger than the imageview but with different ratio or same than that of the image.
But the one where it is not fitting to the imageview, the image itself is of that much size, i.e. smaller than that of the imageview, hence it is NOT being fitted to the bounds.
This how I add an image:
UIImageView *imageHolder = [[UIImageView alloc] initWithFrame:
CGRectMake((self.view.frame.size.width/2) - (290/2),(self.view.frame.size.height) - (140 * 1.8), 290, 140)];
UIImage *image = [UIImage imageNamed:#"no-pins.png"];
imageHolder.image = image;
imageHolder.contentMode = UIViewContentModeScaleAspectFit;
// optional:
// [imageHolder sizeToFit];
[self.view addSubview:imageHolder];
The size of the image (retina version) is exactly the same size as in CGRectMake above. However the image is a little blurred. I only can reduce the blur when I edit the image and give it a higher resolution in photoshop.
But images that I add through storyboard are all fine in quality. Any ideas what might be wrong?
For retina graphics, the image size should be twice the size of the frame of the image view. This allows the image to use a scale of 2 to take advantage of the retina screen capability. So, you should have one image of size 290x140 (if you are supporting non-retina devices) and one image of size 580x280 (this is the #2x image).
The frame of the view is the description of the position and size of the view within the view hierarchy (in terms of the superview coordinate system). If you have fractional values in the frame size or position you can get 'blurring' effects.