odd behavior of UIPickerView on ActionSheet - objective-c

Question

- (void) actionsheetstart
{
actionSheet=[[UIActionSheet alloc] initWithTitle:#"" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
[actionSheet showInView:self.view];
UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 480, 32)];
[pickerToolbar sizeToFit];
pickerToolbar.barStyle = UIBarStyleBlackTranslucent;
NSMutableArray *barItems = [[NSMutableArray alloc] init];
UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithTitle:#"Cancel" style:UIBarButtonSystemItemCancel target:self action:#selector(cancel_clicked:)];
[barItems addObject:cancelBtn];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[barItems addObject:flexSpace];
UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithTitle:#"Done" style:UIBarButtonItemStyleDone target:self action:#selector(done_clicked:)];
[barItems addObject:doneBtn];
[pickerToolbar setItems:barItems animated:YES];
[actionSheet addSubview:pickerToolbar];
UIPickerView *picker = [[UIPickerView alloc] init];
picker.frame = CGRectMake(0, 44, 320, 216);
picker.delegate = self;
picker.dataSource = self;
picker.showsSelectionIndicator = YES;
[actionSheet addSubview:picker];
}
-(void)done_clicked:(id)sender
{
[actionSheet dismissWithClickedButtonIndex:0 animated:YES];
}
-(void)cancel_clicked:(id)sender
{
[actionSheet dismissWithClickedButtonIndex:0 animated:YES];
}
for some reason, the actionsheet is fine, but the UIPickerView and the UIToolBar gone crazy.
I've try to set the frame to -px but without any success. what seems to be the problem?
Thanks alot.

Answer 1

Don't insert UIPickerView inside UIActionSheet, you won't get correct behaviour this way. My solution:
Subclass UIButton, implement method canBecomeFirstResponder:, return YES.
Implement inputView method in your subclassed UIButton, return UIPickerView.
Optionally, implement inputAccessoryView method in your subclassed button to return toolbar above your picker.
Make your button becomeFirstResponder: when tapped.
Voila, you have picker shown modally like a keyboard when button is tapped.
EDIT:
MyButton.h
#import <UIKit/UIKit.h>
#interface MyButton : UIButton
#end
MyButton.m
#import "MyButton.h"
#implementation MyButton {
UIDatePicker *_pv;
}
- (BOOL)canBecomeFirstResponder {
return YES;
}
#pragma mark - Picker
- (UIView *)inputView {
// set up your UIPickerView here
_pv = [[UIDatePicker alloc] init];
[_pv setDatePickerMode:UIDatePickerModeTime];
[_pv setMinuteInterval:30];
return _pv;
}
- (UIView *)inputAccessoryView {
// set up your toolbar here
UIToolbar *tb = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
UIBarButtonItem *flex = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *ok = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(pick:)];
[tb setItems:[NSArray arrayWithObjects:flex, ok, nil]];
return tb;
}
- (void)pick:(id)sender {
// store picker value here before closing inputView
[self resignFirstResponder];
}
#end