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PO"No visible @interface for 'BlahDataController' declares the selector 'aMethod:'"
 

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  1. PO"No visible @interface for 'BlahDataController' declares the selector 'aMethod:'"
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    <p>A simple example of my problem:</p> <p>"Within the BlahDataController.h"</p> <pre><code>@interface BlahDataController : NSObject -(NSString *)aMethod:(NSString *)theString; @end </code></pre> <p>"Within the BlahDataController.m"</p> <pre><code>#import "BlahDataController.h" @implementation BlahDataController -(NSString *)aMethod:(NSString *)theString { return @"Something"; } @end </code></pre> <p>"Within BobViewController.h"</p> <pre><code>@interface BobViewController : NSObject -(void)aMethodOfSomeSort; @end </code></pre> <p>"Within BobViewController.m"</p> <pre><code>#import "BobViewController.h" #import "BlahDataController.h" @implementation BobViewController -(void)aMethodOfSomeSort { BlahDataController *blahDataController = [[BlahDataController alloc] init]; NSLog(@"%@",[blahDataController aMethod:@"Variable"]); } @end </code></pre> <p>On the line "NSLog(@"%@",[blahDataController aMethod:@"Variable"]);" I'm receiving the error: "No visible @interface for 'BlahDataController' declares the selector 'aMethod:'"</p> <p>Anyone know why this error is occurring?</p> <p>-=-=-=-=-=-=-=-=-=-=-</p> <p>The thing is, in my actual program, I have this same implementation and it works fine for hundreds of methods created this way. However, every so often, I'll receive this error on a newly created method. I didn't make it any differently. It just won't recognize it's newly created existence.</p> <p>-=-=-=-=-=-=-=-=-=-=-</p> <p>This is how I'm currently going around it, although I have no idea why the compiler accepts this way, but not the other:</p> <p>Modify BobViewController.m:</p> <pre><code>#import "BobViewController.h" #import "BlahDataController.h" #import "AnotherDataController.h" @implementation BobViewController -(void)aMethodOfSomeSort { BlahDataController *blahDataController = [[BlahDataController alloc] init]; AnotherDataController *anotherDataController = [[AnotherDataController alloc] init]; [anotherDataController fixedMethod:blahDataController theString:@"Variable"]; } @end </code></pre> <p>"Within the AnotherDataController.h"</p> <pre><code>@interface AnotherDataController : NSObject -(void)fixedMethod:(BlahDataController *)blahDataController theString:(NSString *)theString; @end </code></pre> <p>"Within the AnotherDataController.m"</p> <pre><code>#import "AnotherDataController.h" #import "BlahDataController.h" @implementation AnotherDataController -(void)fixedMethod:(BlahDataController *)blahDataController theString:(NSString *)theString { NSLog(@"%@",[blahDataController aMethod:theString]); } @end </code></pre> <p>And....it works just fine...So I imagine xcode is just failing to recognize the method in one class, and working as it should in another...Man, I have no idea why this error is occurring...</p> <p>-=-=-</p> <p>Minor Update:<br> Doing the entire "xcode dance" didn't solve the issue<br> 1) Clean Build<br> 2) Delete Derived Data<br> 3) Completely Close XCode and reopen </p>
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    1. COIs it a persistent problem? Does it go away after a clean and rebuild?
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    2. COI've tried a full clean and rebuild, but to no avail!
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    3. COThats really interesting, one class recognizes the method, the other doesn't...Are you sure its not something really silly, like a typo in the method name either where you declared it or where you're calling it, that you just aren't making the second time?
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