UIDatePicker：將約束添加到時間

Question

是否有方法限制/約束UIDatePicker的時間。

即，如果我希望選取器僅在下午3點到8點之間顯示時間，那麼在此之後沒有任何事情，那可能嗎？

代碼示例會很好。謝謝！

EDIT

- (void)willPresentActionSheet:(UIActionSheet *)actionSheet 
{ 


    // **EDIT 2** 
    NSDateComponents *comps = [[NSDateComponents alloc] init]; 
    [comps setMinute:10]; 
    [comps setHour:5]; 
    NSDate *minimumTime = [[NSCalendar currentCalendar] dateFromComponents:comps]; 


    UIDatePicker *pickerView = [[[UIDatePicker alloc] init] initWithFrame:CGRectMake(0, 40, 320, 216)]; 

    pickerView.datePickerMode = UIDatePickerModeTime; 
    [pickerView setMinimumDate:minimumTime]; 

    [pickerView setMinuteInterval:15]; 
    [pickerView setTag: kDatePickerTag1]; 
    //Add picker to action sheet 
    [actionSheet addSubview:pickerView]; 
    NSArray *subviews = [actionSheet subviews]; 
} 

startTimeLabel是應作爲對UIPicker最小時間一個NSString變量（即6:30 PM）。

圖片：

Answer 1

使用此代碼：

[datePicker setMaximumDate:yourmaxDate]; 
[datePicker setMinimumDate:yourminDate]; 

要創建的NSDate：

NSDate *todaysDate = [NSDate date]; 
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
NSDateComponents *comps = [gregorian components: NSUIntegerMax fromDate:todaysDate]; 
[comps setMinute:10]; 
[comps setHour:5]; 
[comps setSecond:0]; 
NSDate *yourminDate = [gregorian dateFromComponents:comps];