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Joe Silvasi
3,133 Pointsproblem with code challenge 2 of 3; Build a Simple iPhone App(iOS7) - Refactoring into a Model
In code Challenge 1 I added
@property (strong, nonatomic, readonly) NSArray *_quotes;
into Quotes.h When I enter
- (NSArray *) quotes {
if (_quotes == nil) {
_quotes = [[NSArray alloc] initWithObjects:@“Quote1", @“Quote2", @“Quote3", nil];
}
return _quotes;
}
into Quotes.m which seems to follow the sample code pattern presented in the video, I get an error: it tells me to allocate _quotes and return it. Looks like i've done that, so what is it complaining about? I don't see the issue and can't move forward to complete the stage.
4 Answers
Kai Aldag
Courses Plus Student 13,560 PointsHello Joe,
First off in you .h where you declare _quotes don't call it that. call it just quotes because the underscore is used when calling it, it basically replace self. so it should look like this
@property (strong, nonatomic, readonly) NSArray *quotes;
try that, Kai
Joe Silvasi
3,133 PointsWell, you are correct. However, after reviewing the video I note that in the design pattern I was also supposed to add an instance variable _quotes to the @interface in the .h file in addition to the property for quotes like this:
@interface Quote : NSObject { NSArray *_quotes; }
However that doesn't satisfy the "compiler" either and I still get the "Bummer! Remember to allocate and initialize the instance variable '_quotes' and return it from the method named 'quotes'." message.
Kai Aldag
Courses Plus Student 13,560 PointsIs this a code challenge, if it is I'll go do it and let you know where you went wrong.
Joe Silvasi
3,133 Pointsyes it is. Went back and reviewed the video a couple more times. (This specific design pattern is shown at 7:20 in the video.) I've also sent a group of screen shots to the support people but don't expect an answer until early in the week from them.
Joe Silvasi
3,133 PointsNo reply yet from tech support. I downloaded the Crystal Ball app at this stage to Xcode, then copied and pasted it's solution into the task 2 .h and .m files changing "prediction" to "quote" and reducing the number of array instances to just 3 + nil in the .m. Still no joy: it now tells me that "It looks like Task 1 is no longer passing."
I'm starting to get very annoyed at this and am considering canceling my membership If I can't get this to work and move on.
Kai Aldag
Courses Plus Student 13,560 PointsHey Joe,
I wrote it and here is the answer,
1) .h
@property(strong, nonatomic)NSArray *quotes;
2) .m
-(NSArray*)quotes{
if(_quotes == nil){
_quotes = [[NSArray alloc]initWithObjects:@"hello", @"team", @"treehouse", nil];
}
return _quotes;
}
3) .m
- (NSString *) randomQuote {
int random = arc4random_uniform(self.quotes.count);
return [self.quotes objectAtIndex:random];
}
there we go ket me know if this works for you.
Happy hacking, Kai