IOS UIImage data differ with android image (for image downloaded from google)

问题

I am suppose to create a checksum with MD5 Hash generator, and i am using the image "Image to create checksum"

I have downloaded an image on both iOS and Andriod device and created MD5 hash as follows:

For Andriod Device:

Checksum : 09955F4875C8798FFEAF5EFD95FB3AA7

Image :

For IOS Device:

Checksum : 8C18C548188D68C086691BAC7C68DC35

Image :

I have even cross checked creating checksum by downloading image on system as well which also gives "09955F4875C8798FFEAF5EFD95FB3AA7" which is matching with the android hash(checksum).

When i download the image on iOS Device its resolution might be getting change, so how to overcome this problem ?can anyone suggest how to resolve this issue ? i need to match the checksum for both android and iOS.

来源：https://stackoverflow.com/questions/24562540/ios-uiimage-data-differ-with-android-image-for-image-downloaded-from-google