我有一个表格视图,它显示我们使用操作表中的日期选择器选择时间的数据。
在此表格中,查看具有带有标签和 uiswitch 按钮的自定义单元格"提醒单元格"的每一行
1.自定义单元格![在此输入图像描述][1]
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// Note: I set the cell's Identifier property in Interface Builder to DemoTableViewCell.
ReminderCell *cell = (ReminderCell *)[tableView dequeueReusableCellWithIdentifier:CellClassName];
if (!cell)
{
NSArray *topLevelItems = [cellLoader instantiateWithOwner:self options:nil];
cell = [topLevelItems objectAtIndex:0];
}
//set from action sheet only this row 0
if( indexPath.row == 0 )
{
if(date == nil)
{
date = [NSDate date];
}
NSDateFormatter *timeFormatter = [[NSDateFormatter alloc] init];
[timeFormatter setDateFormat:@"hh:mm a"];
cell.label.text = [timeFormatter stringFromDate:date];
}
当用户选择一行时,将弹出带有日期选取器的操作表
![在此输入图像描述][3]
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(date == nil)
{
date = [NSDate date];
}
NSDateFormatter *timeFormatter = [[NSDateFormatter alloc] init];
[timeFormatter setDateFormat:@"hh:mm a"];
//Add Action sheet
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil
delegate:self
cancelButtonTitle:@"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:@"Done",nil];
// Add date picker to the action sheet
datePicker = [[UIDatePicker alloc] init];
datePicker.datePickerMode = UIDatePickerModeTime;
[actionSheet addSubview:datePicker];
[actionSheet showInView:self.navigationController.tabBarController.view];
[actionSheet setBounds:CGRectMake(0,0,320, 550)];
[datePicker setFrame:CGRectMake(0, 138, 320, 216)];
[datePicker release];
[actionSheet release];
}
现在我需要通过从此日期选择器中选择日期来设置提醒,并在打开时设置。提前致谢
UIKit 提供了 NSLocalNotification 对象,它是任务的更高级抽象。
UILocalNotification *yourNotification = [[UILocalNotification alloc] init];
yourNotification.fireDate = [NSDate date]; // time at which the remainder has to be triggered
yourNotification.timeZone = [NSTimeZone defaultTimeZone];
yourNotification.alertBody = @"Notification triggered";
yourNotification.alertAction = @"Details";
/* if you wish to pass additional parameters and arguments, you can fill an info dictionary and set it as userInfo property */
//NSDictionary *infoDict = //fill it with a reference to an istance of NSDictionary;
//aNotification.userInfo = infoDict;
in appDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UILocalNotification *aNotification = [launchOptions objectForKey: UIApplicationLaunchOptionsLocalNotificationKey];
if (aNotification) {
//if we're here, than we have a local notification. Add the code to display it to the user
}
[self.window makeKeyAndVisible];
return YES;
}
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
//if we're here, than we have a local notification. Add the code to display it to the user
}
重新关闭警报
重复间隔
重新安排通知的日历间隔。
@property(非原子(NSCalendarUnit repeatInterval讨论
如果分配日历单位,如每周 (NSWeekCalendarUnit( 或每年 (NSYearCalendarUnit(,系统将重新安排通知以按指定的时间间隔传递。默认值为 0,表示不要重复。
重复日历
系统在重新安排重复通知时应参考的日历。
@property(非原子,复制(NSCalendar *重复日历讨论
默认值为 nil,表示使用当前用户日历。(当前用户日历由 NSCalendar 的 currentCalendar 类方法返回。
并安排警报
UISwitch *onoff = [[UISwitch alloc] initWithFrame: CGRectZero];
[onoff addTarget: self action: @selector(switchAction:) forControlEvents:UIControlEventValueChanged];
// Set the desired frame location of onoff here
[self.view addSubview: onoff];
- (IBAction)switchAction:(id)sender {
UISwitch *theSwitch = (UISwitch *)sender;
UITableViewCell *cell = (UITableViewCell *)theSwitch.superview;
UITableView *tableView = (UITableView *)cell.superview;
NSIndexPath *indexPath = [tableView indexPathForCell:cell];
// From which you can find the index value to get the particular time of the datePicker you set
if (onoff.on){
NSLog(@"On");
//set the alarm at given time from DatePicker using UILocalNotification
}
else{
NSLog(@"Off");
// cancel the alarm Local Notification here
}
}
引用
UILocalNotification Reference
UI通知教程
UILocalNotification 编程指南
UILocalNotification 取消 LocalNotification