uypickerview sqlite에서 채우기

Question

나는 내 sqlite 데이터베이스에서 데이터로 채우려는 uipickerview 있습니다.

appdelegate를 통해 변경 가능한 배열을 통해 데이터에 액세스 할 수 있지만 데이터 소스로 사용하면 uipicker titleforrow 섹션으로 사용할 때 응용 프로그램이 손상됩니다.

배열의 개수가 정확합니다. 데이터가 표시되지 않습니다.

가 여기 내 헤더 파일입니다

- (void)viewDidLoad { 


     [super viewDidLoad]; 

    appDelegate = (DadsTaxiV2AppDelegate *)[[UIApplication sharedApplication] delegate]; 

    self.myarray = appDelegate.messageArray; 




} 


-(void)showPicker 
{ 
    UIActionSheet *menu = [[UIActionSheet alloc] initWithTitle:@"Select a Office Buddy Message to Include:" 
                 delegate:self 
              cancelButtonTitle:@"Select" destructiveButtonTitle:@"Cancel" 
              otherButtonTitles:nil]; 
    menu.tag = 4; 
    menu.actionSheetStyle = UIActionSheetStyleBlackTranslucent; 
    singlePicker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 185, 0, 0)]; 
    singlePicker.delegate=self; 
    singlePicker.showsSelectionIndicator = YES; 

    [singlePicker selectedRowInComponent:0]; 
    [singlePicker reloadComponent:0]; 

    [menu addSubview:singlePicker]; 
    [menu showInView:self.view]; 
    [menu setBounds:CGRectMake(0, 0, 320, 700)]; 

    [singlePicker release]; 
    [menu release]; 

    //NSInteger row = [singlePicker selectedRowInComponent:1]; 
    //NSString *selected = [pickerData objectAtIndex:row]; 

    //infoLabel.text = selected; 



} 

#pragma mark Picker Data Source Methods 
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView 
{ 
    return 1; 
} 
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component 
{ 
    //NSLog(@"[pickerData count]=%d",[pickerData count]); 
    //return [pickerData count]; 

    NSLog(@"[messagearray count]=%d",[self.myarray count]); 
    //return [self.pickerData count]; 
    return [self.myarray count]; 

} 

#pragma mark Picker Delegate Methods 
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component 
{ 
    NSLog(@"[pickerData objectAtIndex:row]=%@",[self.myarray objectAtIndex:row]); 
    //return [self.pickerData objectAtIndex:row]; 
    return [self.myarray objectAtIndex:row]; 
} 

죄송 충돌 로그 잊었 : 여기

@class OBMessage; 

@interface LocationViewController : UIViewController <UITableViewDelegate, UIPickerViewDelegate, UIPickerViewDataSource, UITableViewDataSource, UIActionSheetDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate, MFMailComposeViewControllerDelegate, MFMessageComposeViewControllerDelegate> { 
     UITableViewCell *cell1; 
     UITableViewCell *cell2; 
     UITableViewCell *cell3; 
     UITableViewCell *cell4; 
     UITableViewCell *cell5; 
     UITableViewCell *cell6; 
     UITableViewCell *cell7; 
    UITableViewCell *cell8; 
     IBOutlet UILabel *addressLabel; 
     MKPlacemark *placemark; 
     IBOutlet UILabel *lLat; 
     IBOutlet UILabel *lLong; 
     IBOutlet UILabel *lHAcc; 
     IBOutlet UILabel *lAlt; 
     IBOutlet UILabel *lVAcc; 
     IBOutlet UILabel *lDate; 
     UIPickerView *singlePicker; 
     NSArray *pickerData; 
     NSString *pickedInfo; 
     DadsTaxiV2AppDelegate *appDelegate; 
     NSMutableArray *myarray; 



} 
@property (nonatomic, retain) IBOutlet UITableViewCell *cell1; 
@property (nonatomic, retain) IBOutlet UITableViewCell *cell2; 
@property (nonatomic, retain) IBOutlet UITableViewCell *cell3; 
@property (nonatomic, retain) IBOutlet UITableViewCell *cell4; 
@property (nonatomic, retain) IBOutlet UITableViewCell *cell5; 
@property (nonatomic, retain) IBOutlet UITableViewCell *cell6; 
@property (nonatomic, retain) IBOutlet UITableViewCell *cell7; 
@property (nonatomic, retain) IBOutlet UITableViewCell *cell8; 
@property (nonatomic, retain) IBOutlet UILabel *addressLabel; 
@property (nonatomic, retain) IBOutlet UILabel *lLat; 
@property (nonatomic, retain) IBOutlet UILabel *lLong; 
@property (nonatomic, retain) IBOutlet UILabel *lHAcc; 
@property (nonatomic, retain) IBOutlet UILabel *lAlt; 
@property (nonatomic, retain) IBOutlet UILabel *lVAcc; 
@property (nonatomic, retain) IBOutlet UILabel *lDate; 
@property (nonatomic, retain) IBOutlet UIPickerView *singlePicker; 
@property (nonatomic, retain) NSArray *pickerData; 
@property (nonatomic, retain) NSString *pickedInfo; 
@property (nonatomic, retain) NSMutableArray *myarray; 


@property (nonatomic, retain) MKPlacemark *placemark; 

-(IBAction)popupCameraSheet:(id)sender; 
-(IBAction)popupMessageSheet:(id)sender; 
-(void)showPicker; 


@end 

내 m 파일의 비트가 당신의 충돌 로그에 의해

didSelectViewController:<LocationViewController: 0x9b7de90> 
2012-09-07 20:43:07.142 OfficeBuddy[7300:c07] [messagearray count]=13 
2012-09-07 20:43:07.142 OfficeBuddy[7300:c07] [messagearray count]=13 
2012-09-07 20:43:07.142 OfficeBuddy[7300:c07] [pickerData objectAtIndex:row]=<OBMessage: 0x9a74ae0> 
2012-09-07 20:43:07.143 OfficeBuddy[7300:c07] -[OBMessage isEqualToString:]: unrecognized selector sent to instance 0x9a74ae0 
2012-09-07 20:43:07.144 OfficeBuddy[7300:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[OBMessage isEqualToString:]: unrecognized selector sent to instance 0x9a74ae0' 
*** First throw call stack: 
(0x1759022 0x1a5ecd6 0x175acbd 0x16bfed0 0x16bfcb2 0x8ed0ff 0xbcf17a 0x7a8bc0 0x847c54 0x8483ce 0x833cbd 0x83271a 0x83c220 0xbcf6bb 0x7a77ec 0x7a84f9 0x8ca1 0xcc71 0x83e5c5 0x83e7fa 0x47585d 0x172d936 0x172d3d7 0x1690790 0x168fd84 0x168fc9b 0x22847d8 0x228488a 0x7ad626 0x2f5d 0x2ed5) 
terminate called throwing an exception(lldb) 

Answer 1

을, 배열을 채우는 데이터가 OBMessage 클래스의 인스턴스 인 것 같습니다. 데이터 소스 메소드에서 복귀하는 경우 :

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component 

문자열을 반환하는지 확인하십시오. 따라서 배열에 OBMessage의 인스턴스가 채워지면 선택기에 표시 할 항목을 나타내는 해당 클래스의 속성을 사용합니다. OBMessage이 messageStringRepresentation라는 속성이있는 경우 예를 들어, 반환 :

return [[self.myarray objectAtIndex:row] messageStringRepresentation]; 

Answer 2

봅니다 배열 객체를 인쇄 NSString 개체를 확인합니다. 또는 코드에 isEqualToString을 사용한 경우 코드를 게시하십시오.