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POHow to call method from another class in iOS?
 

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  1. POHow to call method from another class in iOS?
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    <p>I have 2 classes. 1st one is Label, another one is LabelGestureRecognizer. In the LabelGestureRecognizer have a method called getName, and i want call the method through the Label class.</p> <p>Below is a simple example of my problem.<br> I am trying to call the method 'getName', but I am getting an error saying: “No visible @interface for 'LabelGestureRecognizer' declares the selector 'getName:'”</p> <p>ViewController.h:</p> <pre><code>@property (nonatomic, strong) UILabel *valueLabel; </code></pre> <p>ViewController.m:</p> <pre><code>- (void)viewDidLoad { valueLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 366, 320, 50)]; valueLabel.textAlignment = UITextAlignmentCenter; valueLabel.backgroundColor = [UIColor lightGrayColor]; [self.view addSubview:valueLabel]; } - (void) wheelDidChangeValue:(NSString *) newValue { self.valueLabel.text = newValue; } </code></pre> <p>Label.h:</p> <pre><code>@protocol LabelDelegate &lt;NSObject&gt; @required -(void) wheelDidChangeValue:(NSString *) newValue; @end @class LabelGestureRecognizer; </code></pre> <p>LabelGestureRecognizer.m:</p> <pre><code>- (NSString *) getName:(int) position { NSString *resultat = @""; switch (position) { case 0: resultat = @"Test 1"; break; case 1: resultat = @"Test 2"; break; default: break; } return resultat; } </code></pre> <p>LabelGestureRecognizer.h:</p> <pre><code> @interface LabelGestureRecognizer : UIGestureRecognizer { NSDate *previous; double current; } </code></pre> <p>Label.m:</p> <pre><code> LabelGestureRecognizer *recognizer = [[LabelGestureRecognizer alloc] init]; [self.delegate wheelDidChangeValue:[self getName:0]]; </code></pre>
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    1. CO*" I have a class called Label.m, and i want to call a method, called getName from LabelGestureRecognizer class."* This looks like a bit confusing statement. As per the example, `getName` is in `LabelGestureRecognizer` and you are trying to call from `Label` class. But your statement says the reverse. Which is correct?
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    2. COI think the error messages "No visible @interface for 'LabelGestureRecognizer' declares the selector 'getName:" clearly states that you havent declared the getName method in your .h file. Can you add the .h file code to the question. I am sure that you haven't declared it there or declared with a wrong signature.
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    3. COI have updated my answer with the above .h file. Please check with that and let me know.
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