Assign string values to a NSArray - iOS

Question

I have an iOS app which downloads/parses strings from a JSON file. I need to store these strings in ONE NSArray. But every time I try I get the error:

expected method to write array element not found on object of type 'nsarray *'

All I am doing is assigning these strings to the array in a for loop.... And yet it won't work. It is baffling me why... I have assigned strings and variables to an array in C and C++.... Surely Objective-C supports this as well. What am I doing wrong?

Here is my simple for loop:

for (int loop = 0; loop <= [youtube_channel_id_tags count]; loop++) {

    self.getYTIcon = [[YTICONGET alloc] init];
    NSString *temp_url = [self.getYTIcon get_user_icon:youtube_channel_id_tags[_carousel.currentItemIndex]];
    youtube_user_icons[loop] = [temp_url description];
}

What am I doing wrong??

Thanks, Dan.

Answer 1

youtube_user_icons needs to be a NSMutableArray so that you can change its contents and the line

youtube_user_icons[loop] = [temp_url description];

needs to be

[youtube_user_icons addObject:[temp_url description]];

Answer 2

What is your youtube_user_iconstype? Should be NSMutableArray*, not nsarray *!