NSMutableDictionary setObject forKeyedSubscript example in Objective C (iOS).

NSMutableDictionary setObject forKeyedSubscript

Adds a given key-value pair to the dictionary.

- (void)setObject:(id)object forKeyedSubscript:(id < NSCopying >)aKey

Parameters of [NSMutableDictionary setObject forKeyedSubscript]
object
The value for aKey. A strong reference to the object is maintained by the dictionary. Raises an NSInvalidArgumentException if anObject is nil. If you need to represent a nil value in the dictionary, use NSNull.
aKey
The key for value. The key is copied (using copyWithZone:; keys must conform to the NSCopying protocol). Raises an NSInvalidArgumentException if aKey is nil. If aKey already exists in the dictionary anObject takes its place.

Discussion of [NSMutableDictionary setObject forKeyedSubscript]
This method is identical to setObject:forKey:.

NSMutableDictionary setObject forKeyedSubscript example.

NSMutableDictionary* dict = [[NSMutableDictionary alloc] initWithDictionary:delegate.sharedData.dictFaves];
[dict setObject:@"test" forKeyedSubscript:@"4"];
delegate.sharedData.dictFaves = dict;
[dict release];

Example of [NSMutableDictionary setObject forKeyedSubscript].

- (BOOL)addStudent:(Student *)newStudent
{
    NSLog(@"adding new student");
    if (studentStore == nil) {
        studentStore = [[NSMutableDictionary alloc] init];
    }
    [studentStore setObject:newStudent forKeyedSubscript:newStudent.adminNo];
    return YES;
}

NSMutableDictionary setObject forKeyedSubscript example.

//NSMutableDictionary myDictionary = [[NSMutableDictionary alloc] init];
NSMutableDictionary *myDictionary = [[NSMutableDictionary alloc] init];

NSNumber *value = [myDictionary objectForKey:myWord];

if (value)
{
    NSNumber *nextValue = [NSNumber numberWithInt:[value intValue] + 1];
    [myDictionary setObject:nextValue forKeyedSubscript:myWord];
}
else
{
    [myDictionary setObject:[NSNumber numberWithInt:1] forKeyedSubscript:myWord]
}

End of NSMutableDictionary setObject forKeyedSubscript example article.