dictionaryWithContentsOfFile:
Creates and returns a dictionary using the keys and values found in a file specified by a given path.
+ (id)dictionaryWithContentsOfFile:(NSString *)path
Parameters
- path
- A full or relative pathname. The file identified by path must contain a string representation of a property list whose root object is a dictionary.
Return Value of [NSDictionary dictionaryWithContentsOfFile]
A new dictionary that contains the dictionary at path, or
nil if there is a file error or if the contents of the file are an invalid representation of a dictionary.Discussion of [NSDictionary dictionaryWithContentsOfFile]
The dictionary representation in the file identified by path must contain only property list objects (
NSString, NSData, NSDate, NSNumber, NSArray, or NSDictionary objects). For more details, see Property List Programming Guide. The objects contained by this dictionary are immutable, even if the dictionary is mutable.
Example of [NSDictionary dictionaryWithContentsOfFile]
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]];
}
Example of [NSDictionary dictionaryWithContentsOfFile]
NSMutableArray *mutableArray =[[NSMutableArray alloc] initWithObjects:nil];
NSDictionary *mainDictionary = [NSDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"animals" ofType:@"plist"]];
//--get parent dictionary/Array named animals which holds the animals dictionary items
NSDictionary *parentDictionary = [mainDictionary objectForKey:@"animals"];
//---enumerate through the dictionary objects inside the parentDictionary
NSEnumerator *enumerator = [parentDictionary objectEnumerator];
id value;
while ((value = [enumerator nextObject])) {
if ([[value valueForKey:@"minAge"] isEqualToNumber:[NSNumber numberWithInt:3]])
{
[mutableArray addObject:[value valueForKey:@"name"]];
}
}