Objective C implementing a UIPickerView with a “Done” button

Question

I am trying to implement a \"Done\" button in a UIPickerView Similar to the one under this link

I looked in the class reference but I couldn t find it

Thank

Answer 1

There is a more elegant solution. I'm not sure if this is recent (as of iOS7), but this has been working for me splendidly.

TJDatePicker.h

@protocol TJDatePickerActionDelegate <NSObject>
- (void)cancel:(id)sender;
- (void)done:(id)sender;
@end

@interface TJDatePicker : UIDatePicker
@property (strong, nonatomic) UIView *navInputView;
@property (weak, nonatomic) id<TJDatePickerActionDelegate> actionDelegate;
@end

TJDatePicker.m

#import "TJDatePicker.h"

@interface TJDatePicker ()
@property (strong, nonatomic) TJButton *cancelButton;
@property (strong, nonatomic) TJButton *doneButton;
@end

@implementation TJDatePicker

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        [self updateSubviews];
    }

    return self;
}

- (void)layoutSubviews
{
    [super layoutSubviews];

    [self updateSubviews];
}

- (void)updateSubviews
{
    self.navInputView.frame = CGRectMake(0, 0, self.width, 45);
    self.cancelButton.frame = CGRectMake(5, 5, 80, 35);
    CGFloat width = 80;
    self.doneButton.frame = CGRectMake(CGRectGetMaxX(self.navInputView.frame) - width, self.cancelButton.frame.origin.y, width, self.cancelButton.height);
}

- (UIView *)navInputView
{
    if (!_navInputView)
    {
        _navInputView = [[UIView alloc] init];
        _navInputView.backgroundColor = [UIColor whiteColor];

        self.cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [self.cancelButton setTitle:@"CANCEL" forState:UIControlStateNormal];
        [self.cancelButton addTarget:self action:@selector(cancelButtonPressed) forControlEvents:UIControlEventTouchUpInside];
        [_navInputView addSubview:self.cancelButton];

        self.doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [self.doneButton setTitle:@"DONE" forState:UIControlStateNormal];
        [self.doneButton addTarget:self action:@selector(doneButtonPressed) forControlEvents:UIControlEventTouchUpInside];
        [_navInputView addSubview:self.doneButton];
    }

    return _navInputView;
}

- (void)cancelButtonPressed
{
    [self.actionDelegate cancel:self];
}

- (void)doneButtonPressed
{
    [self.actionDelegate done:self];
}

And then at implementation time...

self.datePicker = [[TJDatePicker alloc] init];
self.datePicker.actionDelegate = self;
self.textField.inputAccessoryView = self.datePicker.navInputView;

The key here is to use the inputAccessoryView of the UITextField that you are planning on setting the UIDatePicker to.