UIDatePicker上的UIBarButtonItem作為inputView不可點擊

Question

當您單擊dateTextField ，它顯示datePicker與toolBar 。
我將doneButton添加到toolBar ，但doneButton不可點擊。
我如何解決它？

    @property (nonatomic, retain) UIDatePicker* datePicker;
    @property (nonatomic, retain) UIToolBar* toolBar;
    @property (nonatomic, retain) UITextField* dateTextField;

    self.datePicker = [[UIDatePicker alloc]init];
    self.datePicker.datePickerMode = UIDatePickerModeTime;
    self.toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, -40, 320, 40)];
    [self.datePicker addSubview:self.toolBar];
    UIBarButtonItem* doneButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(closePicker)];
    NSArray* barItems = [NSArray arrayWithObjects:doneButton, nil];
    [self.toolBar setItems:barItems animated:YES];

    self.dateTextField = [[UITextField alloc]initWithFrame:CGRectMake(90, 5, 100, 25)];
    self.dateTextField.delegate = self;
    self.dateTextField.inputView = self.datePicker;
    [self.view addSubview:self.dateTextField];

謝謝。

Answer 1

不要將工具欄添加為日期選擇器的子視圖。 而是將dateTextField的inputAccessoryView屬性設置為工具欄（工具欄具有普通框架）。 像這樣：

@property (nonatomic, retain) UIDatePicker* datePicker;
@property (nonatomic, retain) UIToolBar* toolBar;
@property (nonatomic, retain) UITextField* dateTextField;

self.datePicker = [[UIDatePicker alloc]init];
self.datePicker.datePickerMode = UIDatePickerModeTime;


self.toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
UIBarButtonItem* doneButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(closePicker)];
NSArray* barItems = [NSArray arrayWithObjects:doneButton, nil];
[self.toolBar setItems:barItems animated:YES];

self.dateTextField = [[UITextField alloc]initWithFrame:CGRectMake(90, 5, 100, 25)];
self.dateTextField.delegate = self;
self.dateTextField.inputView = self.datePicker;
self.dateTextField.inputAccessoryView = self.toolbar;
[self.view addSubview:self.dateTextField];

另請參閱這篇Apple文章以了解更多信息：

https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/InputViews/InputViews.html