可能重复：
Is there any limit of file size in the Document of IOS app
我正在尝试将文本文件保存在iPhone上的Documents文件夹中。此文件夹是否有容量限制？或者它只取决于iPhone的内存容量？
答案 0 :(得分：0)
除了设备本身的剩余容量之外，沙箱的大小没有限制。
To manage program memory, iPhone OS uses essentially the same virtual memory system found in Mac OS X.
In iPhone OS, each program still has its own virtual address space, but (unlike
Mac OS X) its usable virtual memory is constrained by the amount of physical memory
available. This is because iPhone OS does not write volatile pages to disk when memory
gets full. Instead, the virtual memory system frees up volatile memory,
as needed, to make sure the running application has the space it needs. It does
this by removing memory pages that are not being used and that contain read-only contents,
such as code pages. Such pages can always be loaded back into memory later if they are needed again.
If memory continues to be constrained, the system may also send notifications to
the running applications, asking them to free up additional memory. All applications
should respond to this notification and do their part to help relieve the memory pressure.
For information on how to handle such notifications in your application, see
“Observing Low-Memory Warnings.”