setMaximumDateがUIDatePickerModeDateで機能していませんUIDatePicker ObjectiveC

Question

私は誕生日にUIDatePickerを実装しようとしていますが、今日の最大日付を制限します。ここで

が私のコードです：

UIDatePicker * datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 30, [UIScreen mainScreen].bounds.size.width - 50, 200)]; 
[datePicker setDatePickerMode:UIDatePickerModeDate]; 
[datePicker setMaximumDate:maxDate]; 
[self.view addSubview:datePicker]; 

setMaximumDateは全くObjectiveC

でUIDatePickerためUIDatePickerModeDateモードで動作していない、事前に感謝を助けてください。

Answer 1

セット今

NSDate* now = [NSDate date] ; 
// Get current NSDate without seconds & milliseconds, so that I can better compare the chosen date to the minimum & maximum dates. 
NSCalendar* calendar = [NSCalendar currentCalendar] ; 
NSDateComponents* nowWithoutSecondsComponents = [calendar components:(NSEraCalendarUnit|NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit|NSHourCalendarUnit|NSMinuteCalendarUnit) fromDate:now] ; 
NSDate* nowWithoutSeconds = [calendar dateFromComponents:nowWithoutSecondsComponents] ; 
// UIDatePicker* picker ; 
picker.minimumDate = nowWithoutSeconds ; 

NSDateComponents* addOneMonthComponents = [NSDateComponents new] ; 
addOneMonthComponents.month = 1 ; 
NSDate* oneMonthFromNowWithoutSeconds = [calendar dateByAddingComponents:addOneMonthComponents toDate:nowWithoutSeconds options:0] ; 
picker.maximumDate = oneMonthFromNowWithoutSeconds ;