ios 如何在标签栏中设置徽章值？
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How to set badge value in Tab bar?
提问by user2728139
i have to read datas from xml and have to display values in view controller. am using tab barcontroller . where i have to read xml data and have to display it in tab bar as badge. here is my controller code.
我必须从 xml 读取数据，并且必须在视图控制器中显示值。我正在使用标签栏控制器。我必须读取 xml 数据并在标签栏中将其显示为徽章。这是我的控制器代码。
-(void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict
{
if([elementName isEqualToString:@"Event"]) {
//Initialize the array.
rssOutputData = [[NSMutableArray alloc] init];
mycount = [attributeDict objectForKey:@"count"];
NSLog(@"Reading count value :%@",mycount);
}
else if([elementName isEqualToString:@"eventdashboard"]) {
//Initialize the book.
aEvent = [[Eventlist alloc] init];
//Extract the attribute here.
aEvent.id = [[attributeDict objectForKey:@"userid"] integerValue];
NSLog(@"Reading id value :%d", aEvent.id);
}
NSLog(@"Processing Element: %@", elementName);
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
if(!nodecontent)
nodecontent = [[NSMutableString alloc] initWithString:string];else
[nodecontent appendString:string];
NSLog(@"Processing Value: %@", nodecontent);
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if([elementName isEqualToString:@"Event"])
return;
if([elementName isEqualToString:@"eventdashboard"]) {
[rssOutputData addObject:aEvent];
[aEvent release];
aEvent= nil;
}
else
[aEvent setValue:nodecontent forKey:elementName];
[nodecontent release];
nodecontent = nil;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"bg2.jpeg"]];
NSLog(@"%d",memberid);
myid = [SingleTonClass sinlgeTon].memberIdOne;
NSString *post =[[NSString alloc] initWithFormat:@"userid=%d",myid];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSURL *url = [NSURL URLWithString:@"http://journalonline.in/cfts/dashboards/dashboard?"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
// [theRequest addRequestHeader:@"Content-Type" value:@"application/xml"];
[theRequest setHTTPMethod:@"POST"];
[theRequest setValue:@"application/xml" forHTTPHeaderField:@"Accept"];
[theRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[theRequest setValue:postLength forHTTPHeaderField:@"Content-Length"];
[theRequest setHTTPBody:postData];
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if( theConnection )
{
webData = [[NSMutableData data] retain];
NSLog(@"%@",webData);
}
}
-(void)viewWillAppear:(BOOL)animated{
[tblView reloadData];
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[webData setLength: 0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[connection release];
[webData release];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection {
eventarray = [[NSMutableArray alloc]init];
xmlParserObject = [[NSXMLParser alloc] initWithData:webData];
[xmlParserObject setDelegate:self];
[xmlParserObject parse];
for (int i =0; i<[rssOutputData count]; i++) {
Eventlist *log = [rssOutputData objectAtIndex:i];
eventid = log.id;
NSLog(@"%d",eventid);
Invit = log.invitationdet;
NSLog(@"%@",Invit);
[eventarray addObject:log];
}
[connection release];
[tblView reloadData];
}
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
NSString * segueIdentifier = [segue identifier];
if([segueIdentifier isEqualToString:@"MainEventList"]){
UINavigationController *nav = [segue destinationViewController];
MaineventListController *MVC = (MaineventListController *)nav.topViewController;
MVC.memberid1 = [SingleTonClass sinlgeTon].memberIdOne;
NSLog(@"%d",MVC.memberid1);
}
if ([segue.identifier isEqualToString:@"EventListDetail"])
{
NSIndexPath *indexPath = [tblView indexPathForSelectedRow];
[[SingleTonClass sinlgeTon] addObjectsColorArray:[NSString stringWithFormat:@"%d",indexPath.row]];
MainEventDetailController *destViewController = segue.destinationViewController;
MainEvent *aEvent1 = [eventarray objectAtIndex:indexPath.row];
destViewController.eveID = aEvent1.id;
destViewController.usrid = [SingleTonClass sinlgeTon].memberIdOne;
}
}
-(void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [eventarray count];
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (section == 0)
return [eventarray count];
if (section == 1)
return 1;
return 0;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"eventCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if(indexPath.section == 0)
{
Eventlist *msglist = [eventarray objectAtIndex:indexPath.row];
cell.textLabel.text = msglist.invitationdet;
NSLog(@"Array %@",[SingleTonClass sinlgeTon].colorArray);
NSInteger stat=msglist.readflag;
if([[SingleTonClass sinlgeTon].colorArray containsObject:[NSString stringWithFormat:@"%d",indexPath.row]] || stat == 1 ) {
NSInteger stat1 = msglist.responseflag;
if(stat1 == 1){
cell.textLabel.textColor = [UIColor yellowColor];
}
else {
cell.textLabel.textColor = [UIColor redColor];
}
}
else{
cell.textLabel.textColor = [UIColor greenColor];
}
cell.backgroundColor = [UIColor blackColor];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
if(indexPath.section == 1)
{
UIButton *viewmoreButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
viewmoreButton.frame = CGRectMake(200.0f, 5.0f, 80.0f, 30.0f);
[viewmoreButton setTitle:@"View More" forState:UIControlStateNormal];
[cell addSubview:viewmoreButton];
[viewmoreButton addTarget:self
action:@selector(viewMore:)
forControlEvents:UIControlEventTouchUpInside];
cell.backgroundColor = [ UIColor blackColor];
}
return cell;
}
- (void)viewMore:(id)sender
{
[self performSegueWithIdentifier:@"MainEventList" sender:sender];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
-(void) dealloc
{
[xmlParserObject release];
[super dealloc];
}
Here am reading a value from XML
这是从 XML 读取值
mycount = [attributeDict objectForKey:@"count"];
I dont know to display in tab bar as badge. i tried to display it under ViewdidLoad but didnt worked pls help me friends
我不知道在标签栏中显示为徽章。我试图在 ViewdidLoad 下显示它但没有奏效请帮助我的朋友
回答by Vineet Singh
Let me tell you the simplest way to set badge value :
让我告诉您设置徽章值的最简单方法：
[[self navigationController] tabBarItem].badgeValue = @"YourBadgeValue";
回答by Andrea Gottardo
Vineet Singh's answer is good if you want to change the badge for the current tab. If instead you need to change the value for another tab you have in your tab bar, use the following:
如果您想更改当前选项卡的徽章，Vineet Singh 的回答很好。如果您需要更改选项卡栏中另一个选项卡的值，请使用以下命令：
Objective-C
目标-C
[[self.tabBarController.tabBar.items objectAtIndex:0] setBadgeValue:nil];
Swift
迅速
tabBarController?.tabBar.items?[0].badgeValue = nil
Remember to replace the index I used with the actual tab you want to edit the value for.
请记住将我使用的索引替换为您要为其编辑值的实际选项卡。
回答by Sandeep-Systematix
AppDelegate *appDelegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
UITabBarItem *tbItem = (UITabBarItem *)[appDelegate.tabBarController.tabBar.items objectAtIndex:tabIndex];
tbItem.badgeValue = [NSString stringWithFormat:@"%i", count];
回答by Bhumeshwer katre
Try this:
尝试这个：
tabBarItem.badgeValue = [NSString stringWithFormat:@"%d",count];
回答by Bill Chan
swift 2.0:
快速 2.0：
self.navigationController!.tabBarItem.badgeValue = "YourBadgeValue"
回答by Waleed Mahmood
int indexOfTabbarItem = 0;
NSString *badgeValue = [NSString stringWithFormat:@"%lu", (long)countUnreadMessages];
[[[[self viewControllers] objectAtIndex:indexOfTabbarItem] tabBarItem] setBadgeValue:([badgeValue isEqualToString:@"0"]) ? nil : badgeValue];
This worked for me. Some times you have to find the right controller and then its item to set it. Cheers.
这对我有用。有时您必须找到正确的控制器，然后才能对其进行设置。干杯。
回答by BK-
I see some answers about setting this on the TabItem, but if the tab has never been loaded the viewDidLoad function will never get loaded. This is especially important when you are trying to create a background process such as push notification handling set a tab's badge. It's much more likely you will need your TabViewController to handle the badge setting. Tags on the TabItem seem more appropriate and then flip through the tabs until you find the one you want to update.
我看到一些关于在 TabItem 上设置它的答案，但如果从未加载过该选项卡，则永远不会加载 viewDidLoad 函数。这在您尝试创建后台进程时尤其重要，例如推送通知处理设置选项卡的徽章。您更有可能需要 TabViewController 来处理徽章设置。TabItem 上的标签似乎更合适，然后翻阅标签，直到找到要更新的标签。
Cheers!
干杯!
回答by Aymen Boumaiza
For ionic angular, you just bind the value to tabBadge
对于 ionic angular，您只需将值绑定到 tabBadge
<ion-tab [root]="tab3Root" tabIcon="notifications" tabBadgeStyle="red" tabBadge={{totalUnread}}></ion-tab>
