iOS App binary files can be as large as 2 GB, but the executable file (app_name.app/app_name) cannot exceed 60 MB. However, consider download times when determining your app’s size. Minimize the file’s size as much as possible, keeping in mind that there is a 100 MB limit for over-the-air downloads. Abnormally large binary files are usually the result of storing data, such as images, inside the compiled binary itself, instead of as a resource inside your app bundle. If you are compiling an image or large dataset into your binary, it would be best to split this data out into a resource that is loaded dynamically by your app.
不太了解所謂的executable file (app_name.app/app_name) cannot exceed 60 MB 是什麼意思
== 簽名檔 ==
As of June 6, 2013
The above information is still the same with the exception of the Executable File size which is now limited to 60MB's. These changes can be found on page 237 of the guide.
the bundle (with the executable and resources)
the documents folder (which can also take up substantial space)
而executable file 就是屬於bundle資料夾裡面
== 簽名檔 ==