uitextfield - UITextField 使用 textField.inputView 在 xcode 4.3.2 中显示 UIPickerView

Question

我希望 UITextField 在触摸时显示 UIPickerView。我发现很多关于使用 UITextField.inputView 的相同主题的问题。但是，当我尝试时，没有任何改变。

我有一个非常简单的代码：

setupViewController.h

#import <UIKit/UIKit.h>

extern NSString *setupRightChannel;

@interface setupViewController : UIViewController
{
    UITextField* rightChannelField; 
    UIPickerView *channelPicker;
}

@property (retain, nonatomic) IBOutlet UITextField* rightChannelField;
@property (retain, readwrite) IBOutlet UIPickerView *channelPicker;

---

setupViewController.m

#import "setupViewController.h"

@Interface setupViewController()

@end

@implementation setupViewController

@synthesize rightChannelField;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization

    }
    return self;
}


- (void)viewDidLoad
{
    [super viewDidLoad];
    self.navigationItem.title = @"Setup";
    // Do any additional setup after loading the view from its nib.
    rightChannelField.inputView = channelPicker;
}

-(IBAction)okClicked:(id)sender
{
    setupRightChannel = rightChannelField.text;
}

我觉得我可能在这里遗漏了一些基本的东西，但老实说，我想不出它是什么。

Answer 1

datePicker = [[UIDatePicker alloc]initWithFrame:CGRectMake(0, 250, 325, 300)];
datePicker.datePickerMode =UIDatePickerModeDate;

NSDateFormatter *dateFormatter =[[NSDateFormatter alloc]init];
[dateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]];
[dateFormatter setDateFormat:@"dd MMM yyyy"];

[datePicker addTarget:self action:@selector(dueDateChanged) forControlEvents:UIControlEventValueChanged];

UIToolbar *pickerToolBar =[[UIToolbar alloc]initWithFrame:CGRectMake(0,0, 320,44)];
pickerToolBar.barStyle =UIBarStyleBlackOpaque;
UIBarButtonItem *barButton =[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *doneButton =[[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                              style:UIBarButtonItemStyleDone target:self
                                                             action:@selector(closeDueDatePicker:)];
[pickerToolBar setItems:[NSArray arrayWithObjects:barButton, doneButton,nil]];
[self.datePicker addSubview:pickerToolBar];
dueDateTextField.inputView =datePicker; // "This is what changes textfields default responder from keyboard to what ever view you assign it (DatePicker view in this case)." 

谢谢