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picker crashing
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<blockquote data-quote="sigappdevel" data-source="post: 1280063" data-attributes="member: 210890"><p>I have a uipicker and i want to change what the array after switching a uisegementedcontrol. After a I switch, the list doesn't updated after I selected it, only after I turn it do the elements change and it will crashed at the bottom after it switches.</p><p></p><p>Does anybody know have to fix this. I have attached my code</p><p></p><p></p><p>//greekfinderViewController.h</p><p></p><p>#import <UIKit/UIKit.h></p><p></p><p></p><p>@interface greekfinderViewController : UIViewController</p><p><UIPickerViewDelegate, UIPickerViewDataSource>{</p><p> IBOutlet UIPickerView *doublePicker;</p><p> NSArray *greeklist;</p><p> NSArray *fraternityArray;</p><p> NSArray *sororityArray;</p><p> IBOutlet UISegmentedControl *fratsoro;</p><p>}</p><p></p><p>@property (nonatomic, retain) IBOutlet UISegmentedControl *fratsoro;</p><p>@property (nonatomic,retain) UIPickerView *doublePicker;</p><p>@property (nonatomic,retain) NSArray *greeklist;</p><p>@property (nonatomic,retain) NSArray *fraternityArray;</p><p>@property (nonatomic,retain) NSArray *sororityArray;</p><p></p><p>- (IBAction) setPicker: (id) sender;</p><p></p><p>@end</p><p></p><p></p><p>//greekfinderViewController.m</p><p></p><p>#import "greekfinderViewController.h"</p><p></p><p>@implementation greekfinderViewController</p><p></p><p>@synthesize doublePicker;</p><p>@synthesize fratsoro;</p><p>@synthesize greeklist;</p><p>@synthesize sororityArray;</p><p>@synthesize fraternityArray;</p><p></p><p>// The designated initializer. Override to perform setup that is required before the view is loaded.</p><p>- (id)initWithNibName<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />NSString *)nibNameOrNil bundle<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />NSBundle *)nibBundleOrNil {</p><p> if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {</p><p> // Custom initialization</p><p> }</p><p> return self;</p><p>}</p><p></p><p></p><p></p><p>// Implement loadView to create a view hierarchy programmatically, without using a nib.</p><p>- (void)loadView {</p><p> [super loadView];</p><p>}</p><p></p><p></p><p>-(void) frats</p><p>{</p><p></p><p> fraternityArray = [[NSArray alloc] initWithObjects:</p><p> @"Acacia",</p><p> @"Alpha Chi Rho",</p><p> @"Alpha Delta Gamma",</p><p> @"Alpha Delta Phi",</p><p> @"Alpha Epsilon Pi",</p><p> @"Alpha Gamma Rho",</p><p> @"Alpha Gamma Sigma",</p><p> @"Alpha Kappa Lambda",</p><p> @"Alpha Phi Alpha",</p><p> @"Alpha Phi Delta",</p><p> @"Alpha Sigma Phi",</p><p> @"Alpha Tau Omega",</p><p> @"Beta Chi Theta",</p><p> @"Beta Theta Pi",</p><p> @"Chi Phi",</p><p> @"Chi Psi",</p><p> @"Delta Chi",</p><p> @"Delta Epsilon Psi",</p><p> @"Delta Kappa Epsilon",</p><p> @"Delta Lambda Phi",</p><p> @"Delta Phi",</p><p> @"Delta Psi",</p><p> @"Delta Sigma Phi",</p><p> @"Delta Tau Delta",</p><p> @"Delta Upsilon",</p><p> @"Farmhouse",</p><p> @"Iota Nu Delta",</p><p> @"Iota Phi Theta",</p><p> @"Kappa Alpha Order",</p><p> @"Kappa Alpha Psi",</p><p> @"Kappa Alpha Society",</p><p> @"Kappa Delta Phi",</p><p> @"Kappa Delta Rho",</p><p> @"Kappa Sigma",</p><p> @"Lambda Chi Alpha",</p><p> @"Lambda Phi Epsilon",</p><p> @"Lambda Sigma Upsilon",</p><p> @"Lambda Theta Phi",</p><p> @"Omega Psi Phi",</p><p> @"Phi Alpha Epsilon",</p><p> @"Phi Beta Kappa",</p><p> @"Phi Beta Sigma",</p><p> @"Phi Delta Epsilon",</p><p> @"Phi Delta Psi",</p><p> @"Phi Delta Theta",</p><p> @"Phi Gamma Delta",</p><p> @"Phi Iota Alpha",</p><p> @"Phi Kappa Psi",</p><p> @"Phi Kappa Sigma",</p><p> @"Phi Kappa Tau",</p><p> @"Phi Kappa Theta",</p><p> @"Phi Mu Delta",</p><p> @"Phi Sigma Alpha",</p><p> @"Phi Sigma Kappa",</p><p> @"Phi Sigma Phi",</p><p> @"Pi Kappa Alpha",</p><p> @"Pi Kappa Phi",</p><p> @"Pi Lambda Phi",</p><p> @"Psi Upsilon",</p><p> @"Sigma Alpha Epsilon",</p><p> @"Sigma Alpha Mu",</p><p> @"Sigma Beta Rho",</p><p> @"Sigma Chi",</p><p> @"Sigma Lambda Beta ",</p><p> @"Sigma Nu",</p><p> @"Sigma Phi Delta",</p><p> @"Sigma Phi Epsilon",</p><p> @"Sigma Phi Society",</p><p> @"Sigma Pi",</p><p> @"Sigma Tau Gamma",</p><p> @"Tau Delta Phi",</p><p> @"Tau Epsilon Phi",</p><p> @"Tau Kappa Epsilon",</p><p> @"Theta Chi",</p><p> @"Theta Delta Chi ",</p><p> @"Theta Tau",</p><p> @"Theta Xi",</p><p> @"Triangle",</p><p> @"Zeta Beta Tau-",</p><p> @"Zeta Psi",</p><p> nil];</p><p> </p><p> </p><p>}</p><p></p><p>- (void) sorts{</p><p> sororityArray = [[NSArray alloc] initWithObjects:</p><p> @"Alpha Chi Omega",</p><p> @"Alpha Delta Pi",</p><p> @"Alpha Gamma Delta",</p><p> @"Alpha Epsilon Phi",</p><p> @"Alpha Omicron Pi",</p><p> @"Alpha Omicron Pi",</p><p> @"Alpha Phi",</p><p> @"Alpha Sigma Alpha",</p><p> @"Alpha Sigma Tau",</p><p> @"Alpha Xi Delta",</p><p> @"Gamma Phi Beta",</p><p> @"Delta Delta Delta",</p><p> @"Delta Gamma",</p><p> @"Delta Zeta",</p><p> @"Delta PHi Epsilon",</p><p> @"Zeta Tau Alpha",</p><p> @"Theata Phi Alpha",</p><p> @"Kappa Alpha Teta",</p><p> @"Kappa Delta",</p><p> @"Kappa Kappa Gamma",</p><p> @"Pi Beta Phi",</p><p> @"Sigma Delta Tau",</p><p> @"Sigma Kappa",</p><p> @"Sigma Sigma Sigma",</p><p> @"Phi Mu",</p><p> @"Phi Sigma Sigma",</p><p> @"Chi Omega",</p><p> nil]; </p><p>}</p><p></p><p>// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.</p><p>- (void)viewDidLoad {</p><p> </p><p> [super viewDidLoad];</p><p> fratsoro.tintColor = [UIColor blueColor];</p><p> fratsoro.selectedSegmentIndex = 0;</p><p> [self frats];</p><p> self.greeklist =fraternityArray;</p><p> [fraternityArray release];</p><p> </p><p> </p><p>}</p><p></p><p>-(IBAction)setPicker <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />id) sender{</p><p> switch (fratsoro.selectedSegmentIndex) {</p><p> case 0:</p><p> [self frats];</p><p> self.greeklist = fraternityArray;</p><p> break;</p><p> case 1:</p><p> [self sorts];</p><p> self.greeklist = sororityArray; </p><p> break;</p><p> </p><p> } </p><p>}</p><p></p><p></p><p>/*</p><p>// Override to allow orientations other than the default portrait orientation.</p><p>- (BOOL)shouldAutorotateToInterfaceOrientation<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />UIInterfaceOrientation)interfaceOrientation {</p><p> // Return YES for supported orientations</p><p> return (interfaceOrientation == UIInterfaceOrientationPortrait);</p><p>}</p><p>*/</p><p></p><p>- (void)didReceiveMemoryWarning {</p><p> // Releases the view if it doesn't have a superview.</p><p> [super didReceiveMemoryWarning];</p><p> </p><p> // Release any cached data, images, etc that aren't in use.</p><p>}</p><p></p><p>- (void)viewDidUnload {</p><p> // Release any retained subviews of the main view.</p><p> // e.g. self.myOutlet = nil;</p><p>}</p><p></p><p></p><p>- (void)dealloc {</p><p> [doublePicker release];</p><p> [greeklist release];</p><p> [sororityArray release];</p><p> [fraternityArray release];</p><p> [super dealloc];</p><p>}</p><p>-(NSInteger)numberOfComponentsInPickerView<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />UIPickerView *)pickerView</p><p>{</p><p> return 1;</p><p>}</p><p></p><p></p><p>-(NSInteger)pickerView<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />UIPickerView *)pickerView</p><p>numberOfRowsInComponent<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />NSInteger)component</p><p>{</p><p> switch (fratsoro.selectedSegmentIndex) {</p><p> case 0:</p><p> return[fraternityArray count];</p><p> break;</p><p> case 1:</p><p> return[sororityArray count];</p><p> break;</p><p> default:</p><p> return[fraternityArray count];</p><p> break;</p><p>}</p><p>}</p><p>-(NSString *)pickerView<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />UIPickerView *)pickerView</p><p> titleForRow<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />NSInteger)row</p><p> forComponent<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" />NSInteger)component </p><p>{</p><p> switch (fratsoro.selectedSegmentIndex) {</p><p> case 0:</p><p> return[self.greeklist objectAtIndex:row];</p><p> break;</p><p> case 1:</p><p> return[self.greeklist objectAtIndex:row];</p><p> break;</p><p> default:</p><p> return[self.greeklist objectAtIndex:row];</p><p> break;}</p><p>}</p><p>@end</p></blockquote><p></p>
[QUOTE="sigappdevel, post: 1280063, member: 210890"] I have a uipicker and i want to change what the array after switching a uisegementedcontrol. After a I switch, the list doesn't updated after I selected it, only after I turn it do the elements change and it will crashed at the bottom after it switches. Does anybody know have to fix this. I have attached my code //greekfinderViewController.h #import <UIKit/UIKit.h> @interface greekfinderViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>{ IBOutlet UIPickerView *doublePicker; NSArray *greeklist; NSArray *fraternityArray; NSArray *sororityArray; IBOutlet UISegmentedControl *fratsoro; } @property (nonatomic, retain) IBOutlet UISegmentedControl *fratsoro; @property (nonatomic,retain) UIPickerView *doublePicker; @property (nonatomic,retain) NSArray *greeklist; @property (nonatomic,retain) NSArray *fraternityArray; @property (nonatomic,retain) NSArray *sororityArray; - (IBAction) setPicker: (id) sender; @end //greekfinderViewController.m #import "greekfinderViewController.h" @implementation greekfinderViewController @synthesize doublePicker; @synthesize fratsoro; @synthesize greeklist; @synthesize sororityArray; @synthesize fraternityArray; // The designated initializer. Override to perform setup that is required before the view is loaded. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) { // Custom initialization } return self; } // Implement loadView to create a view hierarchy programmatically, without using a nib. - (void)loadView { [super loadView]; } -(void) frats { fraternityArray = [[NSArray alloc] initWithObjects: @"Acacia", @"Alpha Chi Rho", @"Alpha Delta Gamma", @"Alpha Delta Phi", @"Alpha Epsilon Pi", @"Alpha Gamma Rho", @"Alpha Gamma Sigma", @"Alpha Kappa Lambda", @"Alpha Phi Alpha", @"Alpha Phi Delta", @"Alpha Sigma Phi", @"Alpha Tau Omega", @"Beta Chi Theta", @"Beta Theta Pi", @"Chi Phi", @"Chi Psi", @"Delta Chi", @"Delta Epsilon Psi", @"Delta Kappa Epsilon", @"Delta Lambda Phi", @"Delta Phi", @"Delta Psi", @"Delta Sigma Phi", @"Delta Tau Delta", @"Delta Upsilon", @"Farmhouse", @"Iota Nu Delta", @"Iota Phi Theta", @"Kappa Alpha Order", @"Kappa Alpha Psi", @"Kappa Alpha Society", @"Kappa Delta Phi", @"Kappa Delta Rho", @"Kappa Sigma", @"Lambda Chi Alpha", @"Lambda Phi Epsilon", @"Lambda Sigma Upsilon", @"Lambda Theta Phi", @"Omega Psi Phi", @"Phi Alpha Epsilon", @"Phi Beta Kappa", @"Phi Beta Sigma", @"Phi Delta Epsilon", @"Phi Delta Psi", @"Phi Delta Theta", @"Phi Gamma Delta", @"Phi Iota Alpha", @"Phi Kappa Psi", @"Phi Kappa Sigma", @"Phi Kappa Tau", @"Phi Kappa Theta", @"Phi Mu Delta", @"Phi Sigma Alpha", @"Phi Sigma Kappa", @"Phi Sigma Phi", @"Pi Kappa Alpha", @"Pi Kappa Phi", @"Pi Lambda Phi", @"Psi Upsilon", @"Sigma Alpha Epsilon", @"Sigma Alpha Mu", @"Sigma Beta Rho", @"Sigma Chi", @"Sigma Lambda Beta ", @"Sigma Nu", @"Sigma Phi Delta", @"Sigma Phi Epsilon", @"Sigma Phi Society", @"Sigma Pi", @"Sigma Tau Gamma", @"Tau Delta Phi", @"Tau Epsilon Phi", @"Tau Kappa Epsilon", @"Theta Chi", @"Theta Delta Chi ", @"Theta Tau", @"Theta Xi", @"Triangle", @"Zeta Beta Tau-", @"Zeta Psi", nil]; } - (void) sorts{ sororityArray = [[NSArray alloc] initWithObjects: @"Alpha Chi Omega", @"Alpha Delta Pi", @"Alpha Gamma Delta", @"Alpha Epsilon Phi", @"Alpha Omicron Pi", @"Alpha Omicron Pi", @"Alpha Phi", @"Alpha Sigma Alpha", @"Alpha Sigma Tau", @"Alpha Xi Delta", @"Gamma Phi Beta", @"Delta Delta Delta", @"Delta Gamma", @"Delta Zeta", @"Delta PHi Epsilon", @"Zeta Tau Alpha", @"Theata Phi Alpha", @"Kappa Alpha Teta", @"Kappa Delta", @"Kappa Kappa Gamma", @"Pi Beta Phi", @"Sigma Delta Tau", @"Sigma Kappa", @"Sigma Sigma Sigma", @"Phi Mu", @"Phi Sigma Sigma", @"Chi Omega", nil]; } // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; fratsoro.tintColor = [UIColor blueColor]; fratsoro.selectedSegmentIndex = 0; [self frats]; self.greeklist =fraternityArray; [fraternityArray release]; } -(IBAction)setPicker :(id) sender{ switch (fratsoro.selectedSegmentIndex) { case 0: [self frats]; self.greeklist = fraternityArray; break; case 1: [self sorts]; self.greeklist = sororityArray; break; } } /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [doublePicker release]; [greeklist release]; [sororityArray release]; [fraternityArray release]; [super dealloc]; } -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 1; } -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { switch (fratsoro.selectedSegmentIndex) { case 0: return[fraternityArray count]; break; case 1: return[sororityArray count]; break; default: return[fraternityArray count]; break; } } -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { switch (fratsoro.selectedSegmentIndex) { case 0: return[self.greeklist objectAtIndex:row]; break; case 1: return[self.greeklist objectAtIndex:row]; break; default: return[self.greeklist objectAtIndex:row]; break;} } @end [/QUOTE]
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