UIPickerView added to uitableviewcontroller.view will not rotate

Question

I have a UIPickerView as a subview in a UITableViewController that I want to copy in place when a specific row is clicked. I applied the necessary dataSource and delegation methods, but pickerview is acting weird. It acts as if it is mechanically jammed, it cannot rotate correctly, it just moves a little. If I try to unscrew it several times, I get this message in the debugger console:

SendDelegateMessage: Delegate failed to return after waiting 10 seconds. main launch mode: UITrackingRunLoopMode If you have not been using the touch screen for all this interval (which may wait), write an error.

I searched for this, to no avail. Anyway, here is the corresponding code. As you can guess, this is a number picker (to select a percentage value).

- (void)viewDidLoad {
     [super viewDidLoad];
     percentPicker  = [[UIPickerViewalloc] initWithFrame:CGRectMake(0,420, 320, 200)];
     percentPicker.delegate = self;
     percentPicker.dataSource = self;
     percentPicker.showsSelectionIndicator = YES;
     [self.view addSubview:percentPicker];
 }

- (void)viewWillAppear:(BOOL)animated {
     // sets the rows to the appropriate value
     // etc
}

- (void)startEditingPercentage {
     [UIView beginAnimations :nilcontext:NULL];
     [UIView setAnimationBeginsFromCurrentState:YES];
     [UIViewsetAnimationDuration:kPickerAnimationDuration ];
     percentPicker.transform = CGAffineTransformTranslate(CGAffineTransformIdentity, 0, -220.0);
     [UIViewcommitAnimations];
 }

- (void)stopEditingPercentage {
    NSLog(@"stopEditingPercentage");
    [UIView beginAnimations :nilcontext:NULL];
    [UIViewsetAnimationBeginsFromCurrentState:YES];
    [UIViewsetAnimationDuration:kPickerAnimationDuration];
    percentPicker.transform = CGAffineTransformIdentity;
    [UIView commitAnimations];
}

#pragma mark UIPickerView delegate and dataSource methods

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return4;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    return10;
}

- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component { 
    return44;
}

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
    UILabel *retval = (UILabel *)view;
    if (!retval) {
        retval= [[UILabel newLabelWithPrimaryColor :[UIColorblackColor ] selectedColor:[ UIColor blackColor] fontSize:22bold:YEStransparent:YES] autorelease];
    }
    retval.frame = CGRectMake(0, 0, 44, 44);
    retval.textAlignment = UITextAlignmentCenter;
    retval.backgroundColor = [UIColor clearColor];
    retval.text = [NSStringstringWithFormat:@"%i", row];
    if (component > 1 ) {
        // rows 2 and 3 are decimal, white on black
        retval.backgroundColor = [UIColor blackColor];
        retval.textColor = [UIColor whiteColor];
    }
    return retval;
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
    NSString *selectedValue;
    selectedValue= [NSString stringWithFormat:@"%i%i.%i%i" ,[percentPickerselectedRowInComponent :0], [ percentPickerselectedRowInComponent: 1], [percentPickerselectedRowInComponent:2], [percentPickerselectedRowInComponent:3]];
    NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
    NSString *trimmedValue = [[formatter numberFromString:selectedValue] stringValue];
    percentValue.text = trimmedValue;
    [formatter release];
}

As you can see, I use the transform property to move the collector in and out (down) of my main view; The startEditing and stopEditing methods are started by selecting in the form of teble. However, for debugging purposes, I eliminated these transitions and left the collector on top of the table, but nothing changed. I also commented on the didSelect method, but that didn't change anything. By the way, the same build code for the collector looks in a different form of the same application. Any suggestion? Cheers

Answer 1

UITableView, viewDidLoad. UITableView / UITableViewCells, cellForRowAtIndex. UITableView, UIView.

UIView UITableView UIView.

UITableViewController, . / , . reloadData. UIView.