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POHow to pass Arrays to a UIPickerView from one class to another?
 

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  1. POHow to pass Arrays to a UIPickerView from one class to another?
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    <p>Bah. I've pulled my hair out over this problem for the past couple days now, but I know I must be overlooking the obvious. I've made my PickerViewController(.h./m) and PickerViewAppDelegate(.h/.m) files and they run fine as a standalone program, but I would like to have the picker pop up after a procedureal event occurs in my "helloworld.m" file. I can get the picker to show up, but I cannot for the life of me figure out how to populate it so that it isn't blank. I THINK I've done everything right up until I try to pass my array to my pickerview object. What am I doing wrong? </p> <p><strong>PickerViewController.h</strong></p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface PickerViewController : UIViewController &lt;UIPickerViewDataSource, UIPickerViewDelegate&gt; { IBOutlet UIPickerView *pickerView; NSMutableArray *scrollerData; } @property (nonatomic, retain) IBOutlet UIPickerView *pickerView; @property (nonatomic, retain) NSMutableArray *scrollerData; -(void)setScrollerData:(NSMutableArray *)array; @end </code></pre> <p><strong>PickerViewController.m</strong></p> <pre><code>#import "PickerViewController.h" @implementation PickerViewController @synthesize pickerView, scrollerData; // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; self.pickerView.delegate = self; self.pickerView.dataSource = self; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview // Release anything that's not essential, such as cached data } - (void)dealloc { // [arrayColors release]; [super dealloc]; } -(void)setScrollerData:(NSMutableArray *)array { //[self.scrollerData arrayByAddingObjectsFromArray:array]; scrollerData = array; } #pragma mark - #pragma mark Picker View Methods - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView { return 1; } - (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component { return [scrollerData count]; } - (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { return [scrollerData objectAtIndex:row]; } - (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { NSLog(@"Selected Number: %@. Index of selected numbers: %i", [scrollerData objectAtIndex:row], row); } </code></pre> <p><strong>PickerViewAppDelegate.h</strong></p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @class PickerViewController; @interface PickerViewAppDelegate : NSObject &lt;UIApplicationDelegate&gt; { UIWindow *window; PickerViewController *pvController; } @property (nonatomic, retain) IBOutlet UIWindow *window; @end </code></pre> <p><strong>PickerViewAppDelegate.m</strong></p> <pre><code>#import "PickerViewAppDelegate.h" #import "PickerViewController.h" @implementation PickerViewAppDelegate @synthesize window; - (void)applicationDidFinishLaunching:(UIApplication *)application { pvController = [[PickerViewController alloc] initWithNibName:@"PickerView" bundle:[NSBundle mainBundle]]; [window addSubview:pvController.view]; // Override point for customization after application launch [window makeKeyAndVisible]; } - (void)dealloc { [pvController release]; [window release]; [super dealloc]; } @end </code></pre> <p><strong>Helloworld.m</strong></p> <pre><code>... UIView* view = [[CCDirector sharedDirector] openGLView]; UIPickerView *pickerView=[[UIPickerView alloc] init]; pickerView.frame=CGRectMake(100,100, 200, 200); NSMutableArray *arrayNumbers = [[NSMutableArray alloc] init]; [arrayNumbers addObject:@"30"]; [arrayNumbers addObject:@"31"]; [arrayNumbers addObject:@"32"]; [arrayNumbers addObject:@"33"]; [arrayNumbers addObject:@"34"]; [arrayNumbers addObject:@"35"]; [arrayNumbers addObject:@"36"]; [pickerView setscrollerData: arrayNumbers];//Should I be calling pickerView here or something else? [view addSubview: pickerView]; pickerView.hidden=NO; ... </code></pre>
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