ios navigation bar item image size

问题:

I want to customize my NavigationBar button and using my own images. The question is what the size should be? I found that the button size should be 40*40, so the image should be 80*80 for retina?

回答1:

These are the sizes that the documentation recommends for custom icons now.

• @2: 50 x 50
• @3: 75 x 75

Create two images of the above pixel sizes and then add them to a new image set in your Assets.xcassets file. (Apparently the @1 size is no longer needed.)

Alternatively, you could use a universal vector image (pdf) (see here and here). This has been my preference recently.

Related answer

• iOS how to set app icon and launch images

回答2:

Apple updated their Human Interface Guidelines Docs. Now the recommended sizes for creating custom icons for Navigation Bar and Toolbar

• @2x - 48px × 48px (24pt × 24pt @2x)

• @3x - 72px × 72px (24pt × 24pt @3x)

回答3:

The typical standard sizes (non-Retina) are 22px by 22px, while the 2x (or Retina) sizes are 44px by 44px.

回答4:

Apple docs were updated and now the recommended size is 25pt x 25pt.

Please refer to documentation here.

回答5:

You should prepare 3 images icons for each tab bar item (1x, 2x and 3x).

First create the 3x at 75w 75h pixels (maximum: 144 x 96) and save it as [e-mail].

Then resize it to 50w 50h pixels (maximum: 96 x 64) and save it as [e-mail].

Finally resize it to 25w 25h pixels (maximum: 48 x 32) and save it as iconTab0.png.

Now all you need is to select those 3 images at your finder and drag them to your image assets.

human interface guidelines

回答6:

Here are the current sizes:

https://developer.apple.com/design/human-interface-guidelines/ios/icons-and-images/custom-icons/

"Toolbar and navigation bar - between 24x24 (@1x) and 28x28 (@1x)".