'[self theArray] =' instead of 'NSArray *theArray ='

Question

If I wanted to create a 2x2 array, I would do:

NSArray *theArray = [NSArray arrayWithObjects:
    [NSArray arrayWithObjects:@"String1",@"String2",nil],
    [NSArray arrayWithObjects:@"String3",@"String4",nil],
nil];

But if I wanted to create it in another way I get an error "Expression is not assignable"

[self theArray] = [NSArray arrayWithObjects:
    [NSArray arrayWithObjects:@"String1",@"String2",nil],
    [NSArray arrayWithObjects:@"String3",@"String4",nil],
nil];

What would be the correct way to use my [self theArray] in the example above?

Dan F · Accepted Answer · 2013-03-20 18:42:29Z

8

self.theArray = [NSArray arrayWithObjects:...

[self theArray] is an accessor, not a mutator

or you can use

[self setTheArray:[NSArray arrayWithObjects:...];

answered Mar 20, 2013 at 18:42

Dan F

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Comments

Joris Kluivers · Accepted Answer · 2013-03-20 18:48:00Z

5

Property assignment is done using the dot notation. To keep is short use the NSArray literal syntax.

self.theArray = @[
    @[@"String1", @"String2"],
    @[@"String3", @"String4"]
];

This assumes you declared theArray as a property of course and a setter is available:

@property(strong) NSArray *theArray;

answered Mar 20, 2013 at 18:48

Joris Kluivers

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1 Comment

bbum Over a year ago

Property assignment is not necessarily done using the dot as the dot is just a convenience.

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