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

Andre Robinson
PLUS
Andre Robinson
Courses Plus Student 6,057 Points

Please help it ask me to set values I'm so lost

This problem is confusing to me

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

NSString * myRide =  [[ NSString alloc] initWithObjects:  @"Make"];

1 Answer

Anjali Pasupathy
Anjali Pasupathy
28,883 Points

You're nearly there. NSString doesn't use initWithObjects; however, you could use initWithString.

If you just replace initWithObjects with initWithString, you'll be assigning the string @"Make" to myRide. That's not what we're trying to do. What we want to do is get the value for the key @"Make" from carDict, and set that value to myRide. The method we can use to get the value for the key @"Make" from carDict is valueForKey:

[carDict valueForKey: @"Make"];

You need to put that method in square brackets so Objective-C can recognize that these words go together as a single unit. In this case, that unit returns an NSString with the value @"Honda", which is what we're trying to do.

Now, all you have to do is use that unit as the argument for initWithString when you're initializing myRide:

NSString * myRide = [[NSString alloc] initWithString: [carDict valueForKey: @"Make"]];

I hope this helps!