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iOS

Posted by Wayne Knoesen
Wayne Knoesen
9,435 Points

Having troubles with Retrieving Data from parse.com

Hi,

I have no idea what I am doing wrong: This is the question: Now add a block parameter. It should have a PFObject as its first parameter and an NSError as its second parameter. Inside the block, use NSLog to log the message "Move retrieved!"

This is what i believe the answer to be:

    // Insert code here!
    [query getObjectInBackgroundWithId:@"1" block:^(PFObject *object, NSError *error) {
        if (error) {
            //do something
        }
        else {
            NSLog(@"Move retrieved!");
        }
    }];

Am I missing something?

3 Answers

John W
John W
21,558 Points
John W
John W
21,558 Points

(Edited for markdown)

The question may not require you to check for error. Try removing the if/else statements and simply call NSLog instead.

It's a good habit to check for error if one is provided though. Good for you!

Wayne Knoesen
Wayne Knoesen
9,435 Points
Wayne Knoesen
Wayne Knoesen
9,435 Points

Tried that already I am sorry to say. How do I get that nice Code block to show? I used the Markdown Cheetsheet and wrapped the code in the ```.

Wanted to show that I tried that already :-)

John W
John W
21,558 Points

Make sure you leave a blank line before the opening and closing for the code markdown

Ben Jakuben
Ben Jakuben
Treehouse Teacher
Ben Jakuben
Ben Jakuben
Treehouse Teacher

Your code worked for me with removing the if/else part (just keeping the NSLog statement). Were you able to get past this? We had some issues with our iOS code challenges a while back and perhaps that was also contributing.

Wayne Knoesen
Wayne Knoesen
9,435 Points

Hi Ben, I got it to work :)

I think I caught the code challenge tool on a bad day. Thanks again for all the awesome lessons!

Andrew Brotherton
Andrew Brotherton
7,515 Points
Andrew Brotherton
Andrew Brotherton
7,515 Points

I've tried this and it simply isn't working. I'm only calling NSLog, entered the block and this simply won't work? 

- (void)viewDidLoad {
    [super viewDidLoad];

[query getObjectInBackgroundWithId:@"1" block:^(PFObject *object, NSError *error) {
NSLog(@"Move retrieved!");
}
       }];
Ben Jakuben
Ben Jakuben
Treehouse Teacher
Ben Jakuben
Ben Jakuben
Treehouse Teacher

A simple mistake that is easier to detect in Xcode...you just have an extra curly brace after your NSLog call. :-/