如何弹出UIDatePicker最好

UIDateicker并没有继承UIPickerView,它的宽度只有iphone的宽度，在ipad上直接显示出来非常不协调，所以苹果建议用UIPopoverViewController来显示，所以你可以在里面任意定制。

在iphone中显示需要手动配制动画，因为它只是一个视图。所以你有下面几种方式显示出一个UIDatePicker.

• 使用UIView动画块从底部慢慢滑动上来
• 嵌入到UIAlert或者UIActionSheet中
• 将UIDateicker视图做为可输入控件的定制键盘，inputView.
• 最后我的变态方案将两个UIDatePicker一起弹出，形成一个时间区域选择 

  • NSLocale *locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"am_ET"] autorelease];
        
        
        UIDatePicker *datePicker1 = [[[IoriDatePicker alloc] initWithFrame:CGRectMake(-80, 0, 0, 0)] autorelease];
        UIDatePicker *datePicker2 = [[[UIDatePicker alloc] initWithFrame:CGRectMake(-80, 0, 0, 0)] autorelease];
        CGRect frame = datePicker1.frame;
        frame.origin.y = -frame.size.height*0.1/2l;
        datePicker1.frame = frame;
        datePicker2.frame = frame;
        datePicker1.transform =  CGAffineTransformMakeScale (0.9, 0.9);
        datePicker2.transform =  CGAffineTransformMakeScale (0.9, 0.9);
        
        NSTimeZone *timeZone = [[NSTimeZone alloc] initWithName:@"Antarctica/Vostok"];
        NSCalendar *calendar = [NSCalendar currentCalendar];
        calendar.locale = locale;
        calendar.timeZone = timeZone;
        datePicker1.calendar = calendar;
        
        UIView *datePickerContaner = [[[UIView alloc] initWithFrame:CGRectMake(0, 30, 320, datePicker1.frame.size.height)] autorelease];
        UIView *datePickerView1 = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 160, datePickerContaner.frame.size.height)] autorelease];
        UIView *datePickerView2 = [[[UIView alloc] initWithFrame:CGRectMake(160, 0, 160, datePickerContaner.frame.size.height)] autorelease];
        datePickerView1.clipsToBounds = YES;
        datePickerView1.autoresizesSubviews = YES;
        datePickerView2.clipsToBounds = YES;
        datePickerView2.autoresizesSubviews = YES;
        datePickerView1.layer.borderWidth = 1;
        datePickerView1.layer.cornerRadius = 8;
        datePickerView2.layer.borderWidth = 1;
        datePickerView2.layer.cornerRadius = 8;
        [datePickerContaner addSubview:datePickerView1];
        [datePickerContaner addSubview:datePickerView2];
        
        
        datePicker1.datePickerMode = UIDatePickerModeTime;
        [datePickerView1 addSubview:datePicker1];
        
        
        datePicker2.datePickerMode = UIDatePickerModeTime;
        [datePickerView2 addSubview:datePicker2];