My application uses a plist as data storage, and I would like to know, what is the maximum storage capacity of a plist file in iOS?
A plist can be of arbitrary length.
Apple, however, only recommend plists having a maximum size of a couple hundred KB:
"For situations where you need to store small amounts of persistent data—say less than a few hundred kilobytes—property lists offer a uniform and convenient means of organizing, storing, and accessing the data."
For data which is more memory intensive, they recommend the following:
"In some situations, the property-list architecture may prove insufficient. If you need a way to store large, complex graphs of objects, objects not supported by the property-list architecture, or objects whose mutability settings must be retained, use archiving."
plist is a file format. It is only constrained by the maximum file size. The way it's read and written poses another constraint: the memory available to hold serialized objects.
来源：https://stackoverflow.com/questions/15383725/what-is-the-maximum-storage-capacity-of-a-plist