Databases
StackOverflow2013
Postsdbo
POiPhone UIPickerView in UIViewController
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POiPhone UIPickerView in UIViewController
    primarykey
    data
    text
    <p>I have a xib in which I have added a <code>UIViewController</code> named delta. The view under delta is controlled by the delta viewcontroller, not the file owner. On the delta view, I have a <code>UIViewPicker</code>. My issue is that I am programming in the <code>UIPickerView</code> in the <code>deltaviewcontroller</code> and I'm issuing <code>deltaviewcontroller</code> as the delegate and data source for the <code>UIPickerView</code>. Everything should work, but when I load the deltaviewcontroller's view, the application crashes. If I carry out everything the same way under the file's owner view, it works fine. I'm wondering if there is really a way to make the UIPickerView work with a <code>UIViewController</code> and no necessarily a file's owner.</p> <p>For references, the code:</p> <p>Header</p> <pre><code>@interface DeltaViewController : UIViewController &lt;UIPickerViewDelegate, UIPickerViewDataSource&gt; { NSMutableArray *arrayNo; IBOutlet UIPickerView *pickerView; } @property (nonatomic, retain) UIPickerView *pickerView; @property (nonatomic, retain) NSMutableArray *arrayNo; @end </code></pre> <p>Implementation</p> <pre><code>#import "DeltaViewController.h" @implementation DeltaViewController @synthesize pickerView; @synthesize arrayNo; - (void)viewDidLoad { NSMutableArray *dollarsArray = [[NSMutableArray alloc] init]; for (int i = 0; i &lt; 100; i++) { NSString *item = [[NSString alloc] initWithFormat:@"%i", i]; [dollarsArray addObject:item]; } self.arrayNo = dollarsArray; [dollarsArray release]; } #pragma mark - #pragma mark Picker Data Source Methods - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 1; } - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { return [arrayNo count]; } #pragma mark Picker Delegate Methods - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { return [arrayNo objectAtIndex:row]; } - (void)dealloc { [arrayNo release]; [pickerView release]; [super dealloc]; } @end </code></pre> <p>Please point out if I'm doing anything wrong. Help is much appreciated. </p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USetolstoy
    1. USintl
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POiPhone UIPickerView in UIViewController
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POiPhone UIPickerView in UIViewController
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThis code looks ok other than that you are leaking the "item" string. What is the actual crash/exception that you are getting? Can you describe and show the code for loading/displaying the delta view controller?
      singulars
      1. POiPhone UIPickerView in UIViewController
      1. USgerry3
    2. COOpen the console from the Run menu and tell us the error you are getting
      singulars
      1. POiPhone UIPickerView in UIViewController
      1. USwillcodejavaforfood
    3. COWhat crash did you get?
      singulars
      1. POiPhone UIPickerView in UIViewController
      1. USkennytm
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload