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iOS

Posted by Jamie Baker
Jamie Baker
5,703 Points

Annoyingly I'm very stuck on this question! Help much appreciated.

Let's warm up our fingers with a quick debugging exercise! There are three errors in this code. Fix them so that this app compiles and runs.

import "JonyIveViewController.h"

@implementation JonyIveViewController

  • (void)viewDidLoad { [super viewWillAppear:NO]; // Rest of viewDidLoad code omitted

  • (IBAction)redesignIOS:(id)sender {

    // Magic redesign code omitted

    NSLog("True simplicity is...where you go, 'Yeah, well, of course.'"); }

@end

I've added the closing curly brackets for viewdidload. ive also changed it to super viewDidLoad. Struggling to work out what the 3rd error is!

5 Answers

Steve Smith
Steve Smith
12,956 Points
Steve Smith
Steve Smith
12,956 Points

NSLog("True simplicity...

should be

NSLog(@"True simplicity...

Stone Preston
Stone Preston
42,016 Points

ah good eye. Ive been writing to much swift code lately. completely forgot about objective c string literals

agreatdaytocode
agreatdaytocode
24,757 Points
agreatdaytocode
agreatdaytocode
24,757 Points

Try this:

@implementation JonyIveViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Rest of viewDidLoad code omitted
}

- (IBAction)redesignIOS:(id)sender  {

// Magic redesign code omitted

NSLog(@"True simplicity is...where you go, 'Yeah, well, of course.'"); 

}

@end
Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

can you post a link to the challenge?

so right now you have

import "JonyIveViewController.h"

@implementation JonyIveViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    // Rest of viewDidLoad code omitted
}

- (IBAction)redesignIOS:(id)sender {

    // Magic redesign code omitted

    NSLog("True simplicity is...where you go, 'Yeah, well, of course.'");
}
@end

correct?

I cant really find anything else wrong with it after fixing those. is there a header file?

Jamie Baker
Jamie Baker
5,703 Points

Yeah I know I'm baffed.

http://teamtreehouse.com/library/getting-up-to-speed.

Cheers

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

looking at the error code it shows this:

no matching function for call to 'CustomNSLog'
    NSLog("True simplicity is...where you go, 'Yeah, well, of course.'");
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
note: expanded from macro 'NSLog'
#define NSLog(...) CustomNSLog(__VA_ARGS__);
                   ^~~~~~~~~~~
note: candidate function not viable: no known conversion from 'const char [60]' to 'NSString *' for 1st argument
void CustomNSLog(NSString *format, ...) {
     ^
1 error generated.

im not really sure what that means. I guess it could be referencing some TTH challenge engine stuff. CustomNSLog is not anywhere in the code. I really have no idea whats wrong haha. Ben Jakuben any ideas?

Anthony Martinez
Anthony Martinez
13,111 Points
Anthony Martinez
Anthony Martinez
13,111 Points

1) add [super viewDidLoad] 2) close viewDidLoad brackets (e.g. viewDidLoad {....} <--- second bracket is missing 3) add @ symbol before the string literal.