//在iphone中没有点击弹出选择时间的控件，下面就利用ios的UIActionSheet + UIDatePicker + UIToolBar 来实现弹出时间选择控件。代码如下：  1 UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:nil cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:nil, nil]; 2      3     UIDatePicker *datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0.0f, 44.0f, 0.0f, 0.0f)]; 4     [datePicker setDate:[NSDate date]];    //显示当前时间 5     [datePicker setUserInteractionEnabled:YES];  //   6     datePicker.datePickerMode = UIDatePickerModeTime; //模式：显示时间 7      8     UIToolbar *pickerDateToolBar = [[UIToolbar alloc]  initWithFrame:CGRectMake(0.0f, 0.0f, self.view.bounds.size.width, 44)]; //创建工具条，用来设置或者退出actionsheet. 9     pickerDateToolBar.barStyle = UIBarStyleBlackOpaque;10     [pickerDateToolBar sizeToFit];11     12     NSMutableArray *barItems = [[NSMutableArray alloc] init];13     14     UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];15     [barItems addObject:flexSpace];16     UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Cancel", nil) style:UIBarButtonSystemItemCancel target:self action:@selector(datePickerCancelClick:)];17     [barItems addObject:cancelButton];18     UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"OK", nil) style:UIBarButtonItemStyleDone target:self action:@selector(datePickerDoneClick:)];19 //    UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(datePickerDoneClick:)];20     [barItems addObject:doneButton];21     22     [pickerDateToolBar setItems:barItems animated:YES]; //将按键加入toolbar23     24     UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20.0f, 11.0f, 100.0f, 22.0f)];25     label.text = NSLocalizedString(@"SetTimeLabel", nil);26     label.backgroundColor = [UIColor clearColor];27     label.textColor = [UIColor whiteColor];28     [label sizeToFit];29     [pickerDateToolBar addSubview:label];30     31     [actionSheet addSubview:pickerDateToolBar];32     [actionSheet addSubview:datePicker];33 //    [actionSheet setBounds:CGRectMake(0.0f, 0.0f, self.view.bounds.size.width, 260)];34     [actionSheet showInView: [UIApplication sharedApplication].keyWindow]; //这里使用全局的键盘的view，可以避免在有tabBar或者toolBar的页面，把actionSheet下方挡住。35 //    [actionSheet setBounds:CGRectMake(0.0f, 0.0f, self.view.bounds.size.width, 260)];