我不知道为什么这段极其基本的代码会设置空值。NSDate*currentTime=[NSDatedate];[datePickersetMinimumDate:currentTime];[datePickersetMaximumDate:[currentTimedateByAddingTimeInterval:kSecondsInYear]];NSLog(@"cur:%@,min:%@,max:%@",currentTime,datePicker.minimumDate,datePicker.maximumDate);输出:cur:2011-09-0916:18:18GMT,min:(