ios - 如何为 iOS 7 创建弹出式 uipicker 和 uitextfield？

Question

我需要将选择器添加到我的文本框，但不知道如何让它们工作。我已经浏览了很多教程，向您展示了如何从头开始，如果您有一个现有的应用程序并且想要添加功能，那么这些教程就没什么用了，在大多数情况下它们不是很有帮助。

我正在寻找与下图非常相似的东西。下面显示的显然是一个 UIDatepicker，但理想情况下是

I'm looking for a custom picker for "place", "term", and "gate".

所以现在，跳过 UIDatepicker 项，关注自定义选择器项。

One more thing, this is iOS7, and I am using storyboards AND arc!

我遇到了这个 ( http://www.youtube.com/watch?v=BtmQp5aP304 )，这真的很有帮助，但它又是从头开始的。我想不通的是如何在我现有的代码中实现它。所以我正在寻找一个演练，一个教程，有人可以指点我让我开始。

There is this on stackoverflow -> how to pop up datePicker when text filed click and disappear when editing done

这给了我一些想法，但不是我正在寻找的东西，尝试了这些建议，但最终出现的错误比其他任何方法都多。

谢谢。

Answer 1

 @interface ViewController ()<UIPickerViewDataSource,UIPickerViewDelegate>

@implementation ViewController
{
  UIPopoverController *popoverController;
      NSString *currentPick;
    ….
}
.
.
.
-(void)makePicker{

 UIPickerView *picker = [[[UIPickerView alloc]init]autorelease];
        picker.frame = CGRectMake(0, 50, 320, 1000);
        picker.showsSelectionIndicator = YES;
        picker.delegate = self;
 UIButton *done = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [done setBackgroundImage:[UIImage imageNamed:@"Save.png"] forState:UIControlStateNormal];
        [done setFrame:CGRectMake(260, 10, 50, 30)];
        [done addTarget:self action:@selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];
 UIButton *cancel = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [cancel setBackgroundImage:[UIImage imageNamed:@"Cancel.png"] forState:UIControlStateNormal];
        [cancel setFrame:CGRectMake(10, 10, 50, 30)];
        [cancel addTarget:self action:@selector(cancelButton:) forControlEvents:UIControlEventTouchUpInside];


 if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone)
    {
        UIActionSheet *pickerAction = [[[UIActionSheet alloc]initWithTitle:[cells objectAtIndex:indexPath.section] delegate:self cancelButtonTitle:nil destructiveButtonTitle:Nil otherButtonTitles:nil]autorelease];
                    [pickerAction addSubview:picker];
        [pickerAction addSubview:done];
        [pickerAction addSubview:cancel];
        [pickerAction showInView:self.view];
        pickerAction.frame = CGRectMake(0,[UIScreen mainScreen].bounds.size.height - 330,320, 350);
    }else
    {
        UIViewController* popoverContent = [[UIViewController alloc] init];
        UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 300)];
        [popoverView addSubview:picker];
        [popoverView addSubview:done];
        [popoverView addSubview:cancel];
        [popoverContent.view addSubview:popoverView];
        popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
        [popoverController presentPopoverFromRect:<your frame> inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
        popoverContent.contentSizeForViewInPopover = CGSizeMake(320, 260);
        [popoverView release];
        [popoverContent release];

    }
}
.
.
.

// mainArray here is a NSArray of several arrays, these arrays contain the titles for different selections… e.g. @[fontArray,colourArray,nameArray]

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return [[mainArray objectAtIndex:clickedAt] count];
}

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
 return [[mainArray objectAtIndex:clickedAt] objectAtIndex:row];
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
   currentPick = [[mainArray objectAtIndex:clickedAt] objectAtIndex:row];
}


- (void)doneButton:(UIButton *)button
{
if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone)
{
    UIActionSheet *as = (UIActionSheet *)[button superview];
    [as dismissWithClickedButtonIndex:0 animated:YES];
}
else
    [popoverController dismissPopoverAnimated:YES];

// save your selections here using currentPick object
}

- (void)cancelButton:(UIButton *)button
{
if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone)
{
    UIActionSheet *as = (UIActionSheet *)[button superview];
    [as dismissWithClickedButtonIndex:0 animated:YES];
}
else
    [popoverController dismissPopoverAnimated:YES];
}

享受您的选择器 ;)