日期範圍選擇公用函數，傳參為選擇的textField

- (void)viewDidLoad

{

    [super
viewDidLoad]; 

    //初始日期

    beginDateTextField_ = [ [
UITextField alloc ]
init ];

    beginDateTextField_.frame =
CGRectMake( newPoint.x , newPoint.y , dudaoTextFieldWidth , dudaoTextFieldHeight );

    beginDateTextField_.borderStyle =
UITextBorderStyleRoundedRect;

    beginDateTextField_.font =[
UIFont fontWithName:
@"Helvetica" size:
16 ];

    beginDateTextField_.contentVerticalAlignment =
UIControlContentVerticalAlignmentCenter;

    //文本輸入框添加按鈕

    beginDateButton = [
UIButton buttonWithType:
UIButtonTypeDetailDisclosure ];

    [ beginDateButton
setImage: buttonImage forState:
UIControlStateNormal ];

    [ beginDateButton
addTarget: self

                         action:
@selector(selectButton:) 

                forControlEvents:
UIControlEventTouchUpInside ];

    beginDateTextField_.rightViewMode =
UITextFieldViewModeAlways;

    beginDateTextField_.rightView =
beginDateButton;

    beginDateTextField_.delegate =
self;

    [ self.view
addSubview: beginDateTextField_ ];

    //初始化存放選擇的textfield

    selectedTextField = [ [
UITextField alloc ] init ];

}

//************最佳化日期選擇代碼***************//

//顯示日期選擇

- (void)dateButtonDidPush

{

    //設定完成按鈕

    UIBarButtonItem* beginDoneButton = 

    [ [ [ UIBarButtonItem
alloc ] 

       initWithBarButtonSystemItem:
UIBarButtonSystemItemDone

       target: self

       action: @selector(doneDidPush) ]
autorelease ];

    [ self
setToolbarItems: [ NSArray
arrayWithObject: beginDoneButton ] animated:
YES ];

    [ UIView
beginAnimations: nil
context: nil ];

    [ UIView
setAnimationDuration: 0.3 ];

    //時間選取器上移

    datePicker_.frame =
CGRectMake( 0 ,
216 , 320 , 216 );

    //工具條上移   

    CGRect toolbarFrame =
self.navigationController.toolbar.frame;

    toolbarFrame.origin.y =
self.view.frame.size.height  - toolbarFrame.size.height -
50 ;

    self.navigationController.toolbar.frame = toolbarFrame;

    

    [ UIView
commitAnimations ];

}

//日期選擇完成按鈕

- (void)doneDidPush

{

    NSDate* date = [ datePicker_
date ];

    NSDateFormatter* dateFormatter = [ [
NSDateFormatter alloc ] init ];

    [ dateFormatter setDateFormat:
@"yyyy-MM-dd" ];;

    selectedTextField.text = [ dateFormatter
stringFromDate: date ];

    [ UIView
beginAnimations: nil
context: nil ];

    [ UIView
setAnimationDuration: 0.3 ];

    //隱藏工具條

    CGRect toolbarFrame =
self.navigationController.toolbar.frame;

    toolbarFrame.origin.y = 

    self.view.bounds.size.height +
65 ;

    self.navigationController.toolbar.frame = toolbarFrame;

    //隱藏完成按鈕

    UIBarButtonItem* spaceButton = [ [ [
UIBarButtonItem alloc ] 

                                      initWithBarButtonSystemItem:
UIBarButtonSystemItemFixedSpace

                                      target:
nil action: nil ]
autorelease ];

    [ self
setToolbarItems: [ NSArray
arrayWithObject: spaceButton ] animated:
YES ];

    //隱藏日期選取器

    datePicker_.frame = toolbarFrame;

    [ UIView
commitAnimations ];

}

//判斷是那一個textfield中按鈕，並把相應textfield傳給 selectedTextField

- (void)selectButton:(UIButton*)button

{

    if ( button == beginDateButton )

    {

        selectedTextField =
beginDateTextField_;

    }

    else

    {

        selectedTextField =
endDateTextField_;

    }

    [ self
dateButtonDidPush ];

}

//***************************************//