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iOS Build a Simple iPhone App (iOS7) Refactoring into a Model Creating a Custom Class

Posted by Roman Stalder
Roman Stalder
3,239 Points

Problems with alloc and initializing

Hi there

in step two I have problems because I can't initialize and allocate properly.

My code for step 2 looks like this:

import "Quote.h"

@implementation Quote

  • (NSString *) randomQuote { if (_quotes == nil) { _quotes = [[NSArray alloc] initWithObjects: @"quote a", @"quote b", @"quote c", nil]; } return @"Some Quote"; }

@end

3 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

Woopsies. my bad. you need to create a whole new method called quotes. you are putting your current code in the randomQuote method which should look like this:

- (NSString *) randomQuote {

    return @"Some Quote";
}

so take your code out of that method, and create a whole new method called quotes which should return an NSArray and put what you had before in there. sorry. didnt notice you had it in the wrong method at first.

Roman Stalder
Roman Stalder
3,239 Points

Thanks, now it works fine.

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points 
- (NSString *) randomQuote {
    if (_quotes == nil) {
     _quotes = [[NSArray alloc] initWithObjects: @"quote a", @"quote b", @"quote c", nil];
  }
    return @"Some Quote";
}

your alloc and init code looks correct. Its the return statement that is incorrect. you need to return the _quotes variable you allocated and initialized, not a string literal.

Roman Stalder
Roman Stalder
3,239 Points
Roman Stalder
Roman Stalder
3,239 Points 
#import "Quote.h"

@implementation Quote

- (NSString *) randomQuote {
            if (_quotes == nil) {
            _quotes = [[NSArray alloc] initWithObjects: @"quote a", @"quote b", @"quote c", nil];
      }
    return _quotes;
}

@end

this doesn't work either. It's says: "Bummer! Remember to allocate and initialize the instance variable '_quotes' and return it from the method named 'quotes'."