Question

我知道新的UIAlertController，但我还没有看到除了创建UIViewController之外的其他解决方案，将UIPickerView添加为子视图并以模态方式呈现...这可能意味着添加代理来传递信息:(

任何人都可以发布一个使用带有选择器的UIAlertController的例子..所有在同一个控制器中？

由于

Answer 1

对于iOS8 ActionSheetPicker-3.0是日期选择器和其他选择器的最佳解决方案。

animation

Answer 2

不要将DatePicker嵌入到UIActionSheet中！从iOS 7开始，UIActionSheet不应该包含任何自定义子视图，我可以向您保证，在iOS 8中，添加到ActionSheet的任何子视图都不显示！

你可以做什么代替并模拟一个ActionSheet如下（下面是一个日期选择器的例子，它从底部开始动画，并且还有一个UIToolbar，上面有按钮）：

创建两个属性：

@property (strong, nonatomic) UIDatePicker *theDatePicker;
@property (strong, nonatomic) UIView *pickerView;

创建您的选择器，将其嵌入UIView并显示：

    -(void) createDatePickerAndShow {

        UIToolbar *controlToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, pickerView.bounds.size.width, 44)];

        [controlToolbar sizeToFit];

        UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

        UIBarButtonItem *setButton = [[UIBarButtonItem alloc] initWithTitle:@"Set" style:UIBarButtonItemStyleDone target:self action:@selector(dismissDateSet)];

        UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelDateSet)];

        [controlToolbar setItems:[NSArray arrayWithObjects:spacer, cancelButton, setButton, nil] animated:NO];


        [theDatePicker setFrame:CGRectMake(0, controlToolbar.frame.size.height - 15, theDatePicker.frame.size.width, theDatePicker.frame.size.height)];

        if (!pickerView) {
            pickerView = [[UIView alloc] initWithFrame:theDatePicker.frame];
        } else {
            [pickerView setHidden:NO];
        }


        CGFloat pickerViewYpositionHidden = self.view.frame.size.height + pickerView.frame.size.height;

        CGFloat pickerViewYposition = self.view.frame.size.height - pickerView.frame.size.height;

        [pickerView setFrame:CGRectMake(pickerView.frame.origin.x,
                                        pickerViewYpositionHidden,
                                        pickerView.frame.size.width,
                                        pickerView.frame.size.height)];
        [pickerView setBackgroundColor:[UIColor whiteColor]];
        [pickerView addSubview:controlToolbar];
        [pickerView addSubview:theDatePicker];
        [theDatePicker setHidden:NO];


        [self.view addSubview:pickerView];

        [UIView animateWithDuration:0.5f
                         animations:^{
                             [pickerView setFrame:CGRectMake(pickerView.frame.origin.x,
                                                             pickerViewYposition,
                                                             pickerView.frame.size.width,
                                                             pickerView.frame.size.height)];
                         }
                         completion:nil];

    }

并解雇DatePicker：

    -(void) cancelDateSet {    
    CGFloat pickerViewYpositionHidden = self.view.frame.size.height + pickerView.frame.size.height;    

        [UIView animateWithDuration:0.5f
                         animations:^{
                             [pickerView setFrame:CGRectMake(pickerView.frame.origin.x,
                                                             pickerViewYpositionHidden,
                                                             pickerView.frame.size.width,
                                                             pickerView.frame.size.height)];
                         }
                         completion:nil];
    }

Answer 3

使用UIAlertController，UIActionSheet的首选替代品。然后使用addSubView将UIDatePicker添加到UIAlertController.view而不是UIActionSheet。设置UIAlertController的标题与UIActionSheet的标题相同。这是一个代码示例：

    @interface MyControllerClass() {
    @private UIDatePicker* datePicker;
    }
    @end

    @implementation MyControllerClass
    ...
    -(void) showDatePicker {
    if (!datePicker)
         datePicker = [[UIDatePicker alloc] init];



  NSString *title = UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation) ? @"\n\n\n\n\n\n\n\n\n" : @"\n\n\n\n\n\n\n\n\n\n\n\n" ;
        if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1){

            //Pre iOS 8
            UIActionSheet *actionSheet = [[UIActionSheet alloc]
                                          initWithTitle:title
                                          delegate:self
                                          cancelButtonTitle:nil
                                          destructiveButtonTitle:nil
                                          otherButtonTitles:@"OK", nil];

            [actionSheet addSubview:datePicker];
            [actionSheet setTag:ACTION_SHEET_DATEPICKER];
            [actionSheet showInView:self.aView];

        } else {

            //for iOS 8

            UIAlertController* datePickerContainer = [UIAlertController alertControllerWithTitle: title
                                                                                         message:nil
                                                                                  preferredStyle: UIAlertControllerStyleActionSheet];

            [datePickerContainer.view addSubview:datePicker];

            //Add autolayout constraints to position the datepicker
            [datePicker setTranslatesAutoresizingMaskIntoConstraints:NO];

            // Create a dictionary to represent the view being positioned
            NSDictionary *labelViewDictionary = NSDictionaryOfVariableBindings(datePicker);

            NSArray* hConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[datePicker]-|" options:0 metrics:nil views:labelViewDictionary];
            [datePickerContainer.view addConstraints:hConstraints];
            NSArray* vConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[datePicker]" options:0 metrics:nil views:labelViewDictionary];
            [datePickerContainer.view addConstraints:vConstraints];

            [datePickerContainer addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction* action){
                [self dateSelected:nil];
            }]];

            [self presentViewController:datePickerContainer animated:YES completion:nil];

        }
      }
    }

    ...
    @end

请根据需要修改和改进。

Answer 4

我认为你必须注意的第一条评论中有一点错误，这是编辑后的代码：

    @property (strong, nonatomic) UIDatePicker *theDatePicker;
    @property (strong, nonatomic) UIView *pickerView;
- (IBAction)createDatePickerAndShow:(id)sender;

然后链接到createDatePickerAndShow按钮。之后创建你的选择器，将其嵌入到UIView中并显示：

//.................Edit to (IBAction)createDatePickerAndShow:(id)sender 

 - (IBAction)createDatePickerAndShow:(id)sender {



        UIToolbar *controlToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, _pickerView.bounds.size.width, 44)];

        [controlToolbar sizeToFit];

        UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

//............add this to disable the warning of @selector(dismissDateSet)]

      #pragma GCC diagnostic ignored "-Wundeclared-selector"

        UIBarButtonItem *setButton = [[UIBarButtonItem alloc] initWithTitle:@"done" style:UIBarButtonItemStyleDone target:self action:@selector(dismissDateSet)];

//...........Edit to UIBarButtonItemStylePlain that is supported in ios 8

        UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithTitle:@"cancel" style:UIBarButtonItemStylePlain target:self action:@selector(cancelDateSet)];

        [controlToolbar setItems:[NSArray arrayWithObjects: cancelButton, spacer, setButton, nil] animated:NO];


        [_theDatePicker setFrame:CGRectMake(0, controlToolbar.frame.size.height - 15, _theDatePicker.frame.size.width, _theDatePicker.frame.size.height)];

        if (!_pickerView) {
            _pickerView = [[UIView alloc] initWithFrame:_theDatePicker.frame];
        } else {

//.................here edit _pickerView    

    [_pickerView setHidden:NO];
        }


        CGFloat pickerViewYpositionHidden = self.view.frame.size.height + _pickerView.frame.size.height;

        CGFloat pickerViewYposition = self.view.frame.size.height - _pickerView.frame.size.height;

        [_pickerView setFrame:CGRectMake(_pickerView.frame.origin.x,
                                        pickerViewYpositionHidden,
                                        _pickerView.frame.size.width,
                                        _pickerView.frame.size.height)];
        [_pickerView setBackgroundColor:[UIColor whiteColor]];
        [_pickerView addSubview:controlToolbar];
        [_pickerView addSubview:_theDatePicker];
        [_theDatePicker setHidden:NO];


        [self.view addSubview:_pickerView];

        [UIView animateWithDuration:0.5f
                         animations:^{
                             [_pickerView setFrame:CGRectMake(_pickerView.frame.origin.x,
                                                             pickerViewYposition,
                                                             _pickerView.frame.size.width,
                                                             _pickerView.frame.size.height)];
                         }
                         completion:nil];



    }

并解雇DatePicker：

-(void) cancelDateSet  {

    CGFloat pickerViewYpositionHidden = self.view.frame.size.height + _pickerView.frame.size.height;

    [UIView animateWithDuration:0.5f
                     animations:^{
                         [_pickerView setFrame:CGRectMake(_pickerView.frame.origin.x,
                                                         pickerViewYpositionHidden,
                                                         _pickerView.frame.size.width,
                                                         _pickerView.frame.size.height)];
                     }
                     completion:nil];
}

在iOS8中的UIActionSheet中添加UIPickerView的最佳解决方案是什么？

4 个答案: