app后台用的图片格式及尺寸 跟着苹果不断更新

app后台用的图片格式及尺寸
1,icon

A large version of your app icon that will be used on the App Store. It must be at least 72 DPI, in the RGB color space, and 1024 x 1024 pixels (it cannot be scaled up). The file type must be .jpeg, .jpg, .tif, .tiff, or .png. It must be flat artwork without
rounded corners.

2, 3.5-inch retina display screenshots 

Screenshots for 3.5-inch iPhone and iPod touch Retina display must be 960x640, 960x600, 640x960 or 640x920 pixels, at least 72 DPI, in the RGB color space, and in the JPG or PNG format.

3, 4-inch retina display screenshots 

Screenshots for 4-inch iPhone 5 and iPod touch (5th generation) Retina display must be 1136x640, 1136x600, 640x1136 or 640x1096 pixels, at least 72 DPI, in the RGB color space, and in the JPG or PNG format.

4,ipad screenshots

iPad Screenshots must be .jpeg, .jpg, .tif, .tiff, or .png file that is 1024x768, 1024x748, 768x1024, 768x1004, 2048x1536, 2048x1496, 1536x2048 or 1536x2008 pixels, at least 72 DPI, and in the RGB color space.

程序中要用到的图片大小及尺寸

1,icon

50*50,29*29,58*58,57*57,114*114, 72＊72，144＊144，512＊512

2,default 

320*480, 640,960,   640*1136  ,2048*1536, 1024*768, 1536*2048, 768*1024