ios - UIDatePicker:为时间添加约束

Question

有没有办法在 UIDatePicker 上限制/约束时间。

即如果我希望选择器仅显示下午 3:00 至晚上 8:00 的时间，在该时间之前和之后都不会显示，这可能吗？

代码示例会很好。谢谢!

编辑

- (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 是一个 NSString 变量(即 6:30 PM)，应该用作 UIPicker 上的最短时间。

图片:

Answer 1

使用这段代码:

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

创建一个 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];