iOS pictures loaded into memory memory usage

My test results:

Picture occupies memory picture size . png File size

1MB 512*512 316KB

4MB 1024*1024 940KB

16MB 2048*2048 2.5MB

1.11MB 512*568

693KB 320*568 186KB

2.773MB 640*1136 664KB

6.240MB 960*1704 1.1MB

From the above test data can be concluded that:

IOS pictures loaded into memory occupy memory size for picture width * picture height ; The figure here is the byte;

( picture Width * picture height )/1024/1024 get MB

You can use the tool Instruments to view the image memory consumption

(COCOS2DX image resource-occupying memory algorithm is an integer multiple width of 2 * * For example: 960*1704 takes up memory is 1024*2048*4, not 960*1704*4)

iOS pictures loaded into memory memory usage