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POSearching for objects in array by name
 

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  1. POSearching for objects in array by name
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    <p>is there a possibility to check for an object in an array by name. At some point in my app I need to access the plist and pull information stored under an object which I found by its name. The reason I need to do this is because I don't have the integer number under which where the object is placed in my array.</p> <p>I have started the usual procedure but i'm not getting anywhere. Maybe its just getting a little too late for me....</p> <p>This is how my plist looks</p> <pre><code>Array Dictionary title ... text ... ect ... Dictionary title ... text ... ect ... Dictionary title ... text ... ect ... </code></pre> <p>My code so far isn't helping at all. I'm definitely doing something wrong.</p> <pre><code>-(NSString*)nameFromPlist:(NSString*)name { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:@"Orte.plist"]; _regionArray = [NSArray arrayWithContentsOfFile:writableDBPath]; NSString *string = [[NSString alloc]init]; for(NSDictionary *dict in _regionArray) { string = [[dict objectForKey:name] valueForKey:@"title"]; } return [NSString stringWithFormat:@"%@",string]; </code></pre> <p>}</p> <p>My string is just returning null.</p> <p>Any ideas anyone? Thanks a lot!</p> <p>ANSWER:</p> <p>Here is the code for everyone:</p> <p>-(NSString*)nameFromPlist:(NSString*)name {</p> <pre><code>NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *tmpFileName = [[NSString alloc] initWithFormat:@"Orte.plist"]; NSString *path = [documentsDirectory stringByAppendingPathComponent:tmpFileName]; NSString *string; NSMutableArray *array = [NSMutableArray arrayWithContentsOfFile:path]; NSDictionary *dict = [[NSDictionary alloc] init]; NSString *title; for (int i=0; i&lt;[array count]; i++) { dict = [array objectAtIndex:i]; title = [dict valueForKey:@"title"]; if([title isEqualToString:name]) { string = [dict valueForKey:@"title"]; NSLog(@"Titel: %@", string); } } return [NSString stringWithFormat:@"%@",string]; </code></pre> <p>}</p> <p>Thank a lot everyone!</p>
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    1. USfreshking
    1. USfreshking
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    1. COYou should add a tag for the language of the code, then you have a better chance that your question gets answered.
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      1. USKai
    2. COThere are several possibilities for unexpected results: Your `_regionArray` could be `nil`; also, in each iteration you discard the previous value of `string` and replace it with a new one, which could potentially be `nil`. Use the debugger to find out the actual values of the variables during execution.
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      1. USwaldrumpus
 

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