image size Xcode swift language for assest xcassets catalog with Xcode

i'm making new application and i'm adding images to that app , i need photo sizes for assest xcasset 1x 2x 3x showing in Xcode , photo sizes means what size should i resize my photo to . 1x landscape size , 2x landscape size , 3x landscape size.

Also. I need app in Mac to resize these images easy and simple.

I'm using mbp mc700/llc 13 inch OS X el capitan.

For icon sizes and launch images, there is a table here:

https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/IconMatrix.html#//apple_ref/doc/uid/TP40006556-CH27-SW1


For general photos or artwork, just choose the size that makes the most sense for the application. So if you choose 300 by 300 for 1x, 2x would be 600 by 600 and 3x would be 900 by 900.

Thx for your replying . I've red that article before but its not what im looking for its not mentioning what photo size must be with 1x 2x 3x its just mentioning icon size Do you think if i made 300by 300 apple wont reject the application or 600 by 600 or 900by900 i thought they need correct size for example iphone 6 is 960by1334 landscape Regards

If you are referring to launch images, yes, they must be a specific size. The "Launch file or image (required for all apps)" row in the link I posted previously gives the sizes for all iPads and for all iPhones through iPhone 5. Clicking the "Lauch Files" link on that row takes you here:

https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/LaunchImages.html#//apple_ref/doc/uid/TP40006556-CH22-SW1

The sizes for iPhone 6/+ are listed at the bottom of that page.


Another way to see this information is to go to your Assets.xcassets file (in Xcode), right-click in the left side of the editor area, choose App Icons and Lauch Images, and choose New iOS Launch Image. On the right side, choose the Attributes inspector, and select all the iPad and iPhone devices. Now click on each image place holder in the editor area, and the expected size will be shown at the bottom of the Attributes inspector. Note that instead of "iPhone 6" and "iPhone 6+", it will have "Retina HD 5.5" and "Retina HD 4.7", and instead of "iPhone 5" it will have "Retina 4".


If you have other photos or images (besides launch images) that you want to be full screen at native resolution within your app, use these same sizes.

image size Xcode swift language for assest xcassets catalog with Xcode
 
 
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