Question

I am trying to update a boolean value in a plist dictionary in an iphone app. The plist dictionary contains several strings and two boolean values. Below is my current code.

I first define the plist and then define the NSMutableDictionary. When the third line of code below is run I get an error.

NSString *plistFile = [[NSBundle mainBundle] pathForResource:@"Property List" ofType:@"plist"];
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithContentsOfFile:plistFile];

[[dict objectForKey:@"Day 1"] setBool:TRUE forKey:@"Bookmarked"];

The error highlights the return statement below with the following error “Thread 1: Program received signal: “SIGABRT”

int main(int argc, char *argv[])
{    @autoreleasepool{   
     return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
     }
}

Any help you can provide will be greatly appreciated. Thanks so much in advance.

Answer 1

Just because dict is mutable doesn’t mean that it’s sub dictionaries are. Also NSMutableDictionary has no setBool:forKey: method.

NSMutableDictionary *subDict = [[dict objectForKey:@"Day 1"] mutableCopy];
[subDict setObject:[NSNumber numberWithBool:TRUE] forKey:@"Bookmarked"];
[dict setObject:subDict forKey:@"Day 1"];