IOS 日期選擇

傳統方式

通常狀況下彈出日期選擇的場景是：用戶點擊UITextField彈出日期選擇，關鍵代碼以下:

點擊UITextField彈出日期選擇

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UITextField *textField; textField.inputView = [[UIDatePicker alloc] init]; textField.inputAccessoryView = [[UIToolbar alloc] init];

可是inputView,inputAccessoryView是在UIView的父類UIResponder中定義的只讀屬性，UITextField重寫了這2個屬性而且將readonly修改爲readwrite

UIResponder

1 2	@property (nullable, nonatomic, readonly, strong) UIView *inputView; @property (nullable, nonatomic, readonly, strong) UIView *inputAccessoryView;

UITextField

1 2	@property (nullable, readwrite, strong) UIView *inputView;             @property (nullable, readwrite, strong) UIView *inputAccessoryView;

 

這就意味着對於普通的UIView咱們是不能經過設置inputView,inputAccessoryView來彈出日期選擇的。

UIViewControler模態彈出方式

這裏咱們使用ViewController模態彈出的方式實現，它能夠在任什麼時候候你想選擇日期時均可以彈出來，而不侷限於經過inputView,inputAccessoryView屬性。

 

 

調用方式

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-  ( void ) showDatePicker {      ISSDatePickerViewController  * viewController  =  [[ISSDatePickerViewController alloc] init];      viewController.minDate  =  [NSDate dateFromString 3 : @ "1900-1-1" ];      viewController.maxDate  =  [NSDate  new ];      viewController.delegate  =  self;      viewController.datePickerMode  =  UIDatePickerModeDate;      viewController.currentDate  =  [NSDate  new ];      if ( IS_IOS 8 _OR_LATER )      {          viewController.modalPresentationStyle  =  UIModalPresentationOverCurrentContext;      }      else      {          viewController.modalPresentationStyle  =  UIModalPresentationCurrentContext;      }      [self presentViewController : viewController animated : YES completion : ^ {          viewController. view .backgroundColor  =  RGBAColor ( 0 ,  0 ,  0 ,  0.3 ) ;      } ]; }   #pragma mark ISSDatePickerViewControllerDelegate -  ( void ) onDatePicked : ( NSDate  * ) date { }

 

效果圖：

 

 

ISSDatePickerViewController