Error on Xcode: Expected method to write array element not found on object of type 'NSArray *'

Question

I have another arrays problem...

I have declared an array as follows:

NSArray *sliderValAtTimes;

This is the code with the error: Code:sliderValAtTimes[x] = sliderValue;

Error: Expected method to write array element not found on object of type 'NSArray *'

Declarations:

int x = 0;
sliderValue = [[NSString alloc] initWithFormat:@"%0.0f", self.slider.value];

Any help would be great!

rmaddy · Accepted Answer · 2014-04-11 23:52:13Z

15

NSArray is immutable. You can't replace an element of an NSArray. You need an NSMutableArray.

answered Apr 11, 2014 at 23:52

rmaddy

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1 Comment

Thank you! It looks like that format made the error go away.