NSDictionary dictionaryWithContentsOfFile doesnt load the data in order

问题

I am trying to load some data from a plist into an array

NSDictionary* mydictionary = [ NSDictionary dictionaryWithContentsOfFile:[ [ [ NSBundle      mainBundle] bundlePath ] stringByAppendingPathComponent:@"MyLevels.plist" ] ];

NSMutableArray *panelNames1;                                                         
panelNames1 = [[NSMutableArray alloc] init];

for (id theKey in mydictionary) {        
    [panelNames1 addObject:[mydictionary objectForKey:theKey]]; 
}

But it does not seem to output in the same order as the MyLevels.plist into the array.

MyLevels.plist looks likes this: [Key:1 Value: One] [Key:2 Value: Two] [Key:3 Value: Three] [Key:4 Value: Four] [Key:5 Value: Five]

But it reads it in this order: Three, One, Four, Two, Five

Any idea why?? Or even another way of doing the for loop maybe so it is in the correct order.

Thanks

回答1:

NSDictionary objects do not preserve ordering. You should not expect to have keys enumerated in the same order in which they were read.

回答2:

If order is important, you should create an array in your plist, and access it from one of the dictionary keys.

回答3:

Any idea why?

Yes. NSDictionary is unordered.

来源：https://stackoverflow.com/questions/5010539/nsdictionary-dictionarywithcontentsoffile-doesnt-load-the-data-in-order