Not able to write to Plist

问题

I have a very basic question about how to write to a plist. I added a "Here.plist" file to my resources folder. The following is my code:

NSString *path = [[NSBundle mainBundle]pathForResource:@"Here" ofType:@"plist"];

NSArray *array = [[NSArray alloc]initWithObjects:@"First", @"Second", @"Third", nil];

[array writeToFile:path atomically:YES];

"Here.plist" is still empty after executing the code. I even tried using a NSDictionary as follows:

NSDictionary *dict = [[NSDictionary alloc]initWithObjectsAndKeys:@"firstValue", @"First", @"secondValue", @"Second", @"thirdValue", @"Third", nil];

[dict writeToFile:path atomically:YES];

I went through many tutorials and forums but its just not working for me. What am i doing wrong? Losing my head over this.

回答1:

You can't write into the bundle. Try writing into the documents directory. For example:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray *array = [[NSArray alloc]initWithObjects:@"First", @"Second", @"Third", nil];
[array writeToFile:[documentsDirectory stringByAppendingPathComponent:@"Here.plist" atomically:YES];

回答2:

I suspect your problem is due to the fact that you can't write to the application bundle, only to your application's document store.

To obtain a path to the document store, use:

NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docStorePath = [searchPaths objectAtIndex:0];

NSString *filePath = [docStorePath stringByAppendingPathComponent:@"XXXXX"];

来源：https://stackoverflow.com/questions/5116831/not-able-to-write-to-plist