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
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1 NSLocale *locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"am_ET"] autorelease]; 2 3 4 UIDatePicker *datePicker1 = [[[IoriDatePicker alloc] initWithFrame:CGRectMake(-80, 0, 0, 0)] autorelease]; 5 UIDatePicker *datePicker2 = [[[UIDatePicker alloc] initWithFrame:CGRectMake(-80, 0, 0, 0)] autorelease]; 6 CGRect frame = datePicker1.frame; 7 frame.origin.y = -frame.size.height*0.1/2l; 8 datePicker1.frame = frame; 9 datePicker2.frame = frame; 10 datePicker1.transform = CGAffineTransformMakeScale (0.9, 0.9); 11 datePicker2.transform = CGAffineTransformMakeScale (0.9, 0.9); 12 13 NSTimeZone *timeZone = [[NSTimeZone alloc] initWithName:@"Antarctica/Vostok"]; 14 NSCalendar *calendar = [NSCalendar currentCalendar]; 15 calendar.locale = locale; 16 calendar.timeZone = timeZone; 17 datePicker1.calendar = calendar; 18 19 UIView *datePickerContaner = [[[UIView alloc] initWithFrame:CGRectMake(0, 30, 320, datePicker1.frame.size.height)] autorelease]; 20 UIView *datePickerView1 = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 160, datePickerContaner.frame.size.height)] autorelease]; 21 UIView *datePickerView2 = [[[UIView alloc] initWithFrame:CGRectMake(160, 0, 160, datePickerContaner.frame.size.height)] autorelease]; 22 datePickerView1.clipsToBounds = YES; 23 datePickerView1.autoresizesSubviews = YES; 24 datePickerView2.clipsToBounds = YES; 25 datePickerView2.autoresizesSubviews = YES; 26 datePickerView1.layer.borderWidth = 1; 27 datePickerView1.layer.cornerRadius = 8; 28 datePickerView2.layer.borderWidth = 1; 29 datePickerView2.layer.cornerRadius = 8; 30 [datePickerContaner addSubview:datePickerView1]; 31 [datePickerContaner addSubview:datePickerView2]; 32 33 34 datePicker1.datePickerMode = UIDatePickerModeTime; 35 [datePickerView1 addSubview:datePicker1]; 36 37 38 datePicker2.datePickerMode = UIDatePickerModeTime; 39 [datePickerView2 addSubview:datePicker2];
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