32 位架构与 64 位架构的主要区别在于应用程序速度和内存管理形式？

Question

As per my knowledge, OS architecture is generally used to speed up our OS and adding new features with higher memory management but in IOS i am little bit confuse regarding architecture which we generally set in our app is as below

Architectures - Standard Architecture (armv7,arm64) Valid Architectures - armv7,arm64,armv7s .

Due to this, we are getting many warnings related to datatypes size and conversation because 64-bit architecture is the use of processors that have datapath widths , integer size , and memory address widths of 64 bits .

so my question is I want to understand what mechanism will work behind this while I generating IPA file for 32 bit supported architecture or 64 bit architecture (I know now after XCode-6 we will only build our app with 64-bit architecture with bitcode enabled in our app for thining our app size)

Can anyone help me with this to understand architecture mechanism, especially in IOS?

Your help will be appreciated.

Answer 1

There are two architecture settings in an iOS project:

• Architectures
• Valid Architectures

The list of Valid Architectures constrains the possible values in the Architectures list.

When building for debugging on a device, Xcode will only build for the architecture of the target device (which may be x86, for the simulator). If the target device is a 32bit architecture, you'll get a 32-bit build.

When building for some kind of release (ad-hoc or App Store), Xcode will build for all the architectures listed in the build setting's Architecture list. The app binary, along with any dynamically-loaded frameworks will have a slice for each architecture.

Answer 2

• Original Link: http://iossupportmatrix.com/

To add on to what Avi said, I hope this picture will give you a better understanding of how OS are evolving. The more right you go, the more the OS can handle information (it can handle more RAM) and some application require more RAM to run. I wish I could give you more specific information about this but I wouldn't want to say something wrong.