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POObjective-C methods not running
 

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    <p>I'm messing around with using objects to launch background threads, however when I call an objects method to call the method that will spawn a background thread, nothing happens. I'm a bit puzzled as to why, and it looks like the -init function isn't even being called. Anyways, here's what I have:</p> <p>ViewController.h</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; #import "Threader.h" @interface ViewController : UIViewController @property(nonatomic, strong) Thread* threadedObject; - (IBAction)StartBackgroundThreadButtonClicked:(id)sender; @end </code></pre> <p>ViewController.m</p> <pre><code>#import "ViewController.h" #import "Threader.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. _threadedObject = [[Threader alloc]init]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (IBAction)StartBackgroundThreadButtonClicked:(id)sender { NSLog(@"Clicked."); [_threadedObject RunInBackground]; } @end </code></pre> <p>Threader.h</p> <pre><code>#import &lt;Foundation/Foundation.h&gt; @interface Threader : NSObject @property(nonatomic) bool IsFinishedRunning; @property(nonatomic) bool IsThreading; //Constructor and Destructor -(id)init; -(void)dealloc; -(void)RunInBackground; -(void)WaitForTenSeconds; @end </code></pre> <p>Threader.m</p> <pre><code>#import "Threader.h" @implementation Threader //constructor -(id)init{ [super init]; if(self != nil) { _IsFinishedRunning = NO; _IsThreading = NO; } return self; } //destructor -(void)dealloc{ [super dealloc]; } //Runs a thread in the background -(void)RunInBackground{ NSLog(@"Initiating thread..."); [self performSelectorInBackground:@selector(WaitForTenSeconds) withObject:nil]; } //Waits for 10 seconds, then sets IsFinishedRunning to YES -(void)WaitForTenSeconds{ NSLog(@"Starting to run in the background."); _IsThreading = YES; sleep(10); _IsFinishedRunning = YES; NSLog(@"Finished running in the background."); } @end </code></pre> <p>When I run the program, this is my output(I clicked the button a few times)<br> 2013-05-17 15:30:57.267 ThreadedObjects Clicked.<br> 2013-05-17 15:30:59.003 ThreadedObjects Clicked.<br> 2013-05-17 15:30:59.259 ThreadedObjects Clicked.<br> 2013-05-17 15:30:59.443 ThreadedObjects Clicked.<br> 2013-05-17 15:30:59.675 ThreadedObjects Clicked. </p> <p>I should be getting messages telling me that the Threader object was created, and that it is preparing to launch a background thread, that the thread has been spawned and then after 10 seconds, that the thread is done running. So, where's my glaring obvious error?</p>
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    1. USDaniel Martin
    1. USDaniel Martin
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    1. COI'd suggest you dive deep on Objective-C; your naming conventions indicate a C++ background. Also, if you are writing NEW concurrent code, consider using NSOperationQueue or GCD instead of threads.
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      1. USbbum
 

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