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iOS Object-Oriented Objective-C Memory, Arrays and Loops, Oh My! Alloc and Init

Posted by Carl Smith
Carl Smith
8,185 Points

Not sure what syntax is incorrect?

Not sure what syntax is incorrect?

variable_assignment.mm 
NSMutableDictionary *carDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Make":@"Honda", @"Model":@"Accord", nil];

1 Answer

Michael Hulet
Michael Hulet
47,912 Points
Michael Hulet
Michael Hulet
47,912 Points

The initWithObjectsAndKeys method is just a normal method, so you need commas to separate all its parameters, so you're not allowed to use the colons to separate the key-value pairs, like in the special @{} syntax. Furthermore, with this method, you're supposed to write the values first, then the keys. This would be a working version of what you're trying to do:

// Notice how everything is comma-separated, and you write the values before the keys
NSMutableDictionary *carDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Honda", @"Make", @"Accord", @"Model", nil];