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I've created 3 icons: 

ic_tags.png - 22x22
ic_tags@2x.png - 44x44
ic_tags@4x.png - 88x88

enter image description here

But I still see that the icon is low quality. And when I try to make image bigger it becomes bigger on the screen

enter image description here

Semyon Tikhonenko
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  • have you checked how it looks on an actual device? – martskins Mar 27 '16 at 22:02
  • @nhgrif When I try 44x44 as default size it looks very large. What the problem can be? – Semyon Tikhonenko Mar 27 '16 at 22:04
  • It *can* matter. The display on actual Apple iOS devices is usually much higher quality than most people's monitors. But even if you're on a retina MacBook pro, there are some discrepancies between how it is displayed on an iOS device and in the simulator... but in this case, the problem is simply you're using the wrong size images. – nhgrif Mar 27 '16 at 22:04
  • Isn't 44x44 a bit big default size for tab bar icons? [Guidelines](https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/IconMatrix.html#//apple_ref/doc/uid/TP40006556-CH27-SW1) say _about_ 25x25 for @1x. – James Mar 27 '16 at 22:08

1 Answers1

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22px is actually just a really small image. You should probably make the image itself bigger and then make the ImageView smaller to achieve a higher resolution.

Evan Conrad
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  • Thank you. When I make image bigger it becomes bigger in the screen. And this is standard tab bar controller. How can I change imageview size in it? – Semyon Tikhonenko Mar 27 '16 at 22:05
  • if your imageview is made through storyboard. You can make it bigger in the right sideview. There's a button that looks like a measuring ruler. Under that menu, there's a "width" and "height" that you can set. Otherwise, you can initialize your image with a `CGRectMake`, like so: `var imageView = UIImageView(frame: CGRectMake(100, 150, 150, 150));`. [Source](http://stackoverflow.com/questions/24709244/how-do-set-a-width-and-height-of-an-image-in-swift) – Evan Conrad Mar 27 '16 at 22:08
  • No I use standard Tab bar controller, which is already built – Semyon Tikhonenko Mar 27 '16 at 22:09
  • There's no such thing as an `ImageView` in this scenario @FlaqueDeau. We're talking about the default `UITabBar`. – James Mar 27 '16 at 22:12