I am using a custom image as the background image for my buttons. I have noticed that the edges of the buttons are cut off sometimes. My buttons vary in size but the behavior doesn't seem to be dependent on the button size. I am creating the buttons programatically. The image I am using is pretty large to cover the entire background.
Can someone please let me know what could be the issue?
More info
Setting the content mode to UIViewContentModeScaleToFill still cuts of the images. Also tried resizing the image but doesn't make a difference.
Thanks.
Did you try setting the button's dimensions to fit exactly the image?
Is the image just cropped or also blurry (cause it's being resized)? Have you toyed around with UIView's contentMode property for the button?
If you did, did you try increasing/decreasing the width or height by a pixel? I sometimes had blurry buttons even though its dimensions were exactly the image's. Adding or removing an extra pixel sometimes helped.
I finally resolved this by creating a 3x3 px image with the background color as the button's color and a 1 px border surrounding the image. Then used the UIImage method stretchableImageWithLeftCapWidth:topCapHeight: to create an image with the desired border size of 1 px.
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I have a bunch of round Images. They are in png with a 512x512 size. I took them from Flaticon.
To display images in a tableView I use imageView with a 45x45px size and Content Mode as Aspect Fit. Images put in a project assets.xcassets folder with a Scale property as Single Scale.
When images displayed by a tableView a jaggy border is visible in every image:
And its visible without zooming in:
Is it a problem with source images? How to make the image border smooth?
The issue is with an image that you have added.
Please use a normal image and give corner radius to image view as below
self.imageFlag.layer.cornerRadius = self.imageFlag.frame.size.height/2
This will resolve your issue
Below is the screenshot
I have this UIImageView which may contain images with different ratios.
I have studied the properties of UIImageView and it seems that the Aspect Fill property set for the Mode of the View should be what I need.
It works as intended when the image is wider than taller: cuts the left and right parts of the image out of the UIImageView.
However if the image is taller than wider it does not cut the above and below part of the image, it allows the image to come out of its view and overlap below views.
These are the constraints I have for the UIImageView:
I have seen several tutorials proceeding like I do, but the result is different for me.
If the image is fitting correctly, but is extending outside the bounds of the image view, try turning on "clip subviews"
For such condition , Two possible solution may help :
Calculate aspect ratio based on your required dimension so that picture quality remains intact . ( ** use Aspect Fit calculator to find required ratio)
CENTER OR ASPECT FIT attributs of Imageview
Thanks
I'm trying to achieve a sort of dynamic UIView masking effect. Here is a sketch:
So as you can see, I'm trying to create a UIView that can effectively cut through an image to reveal the image behind it. I already know how to return an image with a mask statically, however I would like the "revealer" to be draggable (I'll use pan gesture) and live.
Does anyone have any ideas or starting points on how to achieve this? Thanks
(NOTE: My demo says White layer, but I'd actually like to show another image or photo).
masking an image is not that difficult.
This link shows the basics.
http://iosdevelopertips.com/cocoa/how-to-mask-an-image.html
But personally I think i would make 2 UIImage views and crop the content of the draggable UIView. I'm not sure but I would expect that clipping and panning the second image will be less computationally expensive then applying the mask and will get you a better frame rate.
So I would do: UIImageView of the full image. A UIView on top of it with a white and some transparency setting to make it look white, then a UIImageView with the image either places or cropped so that only the correct section is showing.
I have numerous photos in portrait and landscape format. I want to be able to display a "crop" of the photo in a UIImageView on the iphone. If the picture is in landscape format I want it to resize to fit the frame, if it is in portrait format I need it to resize to fit the width, and then be cropped at the top and bottom. As if there is a "window" over the image - so it looks like a landscape picture.
It would be even better if this could be a UIButton - although I am aware that I can use touchesBegan and such on images to make it behave like a button if needs be.
Thanks for any help you can give me.
Thanks
Tom
In an ImageView, you can change the View Mode to Aspect Fill. It will give you the right scaling/cropping you want.
For interactions, you can use a Custom button with no drawing at all (no Title, no Image, no Background) with the same size as your ImageView. That would be safe with regards to the image aspect. I've tried similar stuff using the button's Background or Image properties, it can have some undesired effects (I've ran into a resizing issue on iOS 3.1.3 for instance).
1°) To Crop the Image, try to add a method to UIImage class to do it (you can google it without problem, or even on StackOverFlow)
2°) To add a "window" over your image, just add an UIImageView over your image wich has transparency. It should work ;-)
3°) To know when an image is touched, you can use "touchesBegan" to detect which image were selected. But I think it's the last of your problems ^^
What you cant to achieve isn't so hard, just to it step by step !
If you want more help in one step, say it. But I can't code it all for you ;-)
Good Luck
The image on the right is the one that I produced in photoshop. I then stripped all text and put it in an image view, as soon as I did that there was a change in colour and the vertical line lost it sharpness. Has anyone else run into a similar problem? What do I do?
alt text http://grab.by/1DuZ
Are the dimensions correct? Is the position of the image an integer? If these cases antialiasing will slightly blur your image.
One thing to be careful of is that if your image is an odd number of pixels in either dimension then centering it onscreen will cause it to be misaligned. Imagine if you had a 1x1 image (just one pixel) and tried to center it perfectly onscreen. It can't be done because the screen is an even number of pixels wide and high. This is why it's best to always use even dimensioned images whenever possible.