I have method which call the sqlite method to get data and then display count to application badge number in ip. I want that the method should be called every day at 12.5 am so that it has new count for the day. I am doing in following way:
[NSTimer scheduledTimerWithTimeInterval:300 target:self selector:#selector(makeNotificationRequest:) userInfo:nil repeats:YES];
I am calling this NSTimer in when application goes in background state.
-(void)makeNotificationRequest:(NSTimer *)timer {
[self repeatedMethod];
}
- (void)repeatedMethod {
SOWObject *object =[[SOWObject alloc]init];
[object getBadgeNumber:[self getDBPath]];
[UIApplication sharedApplication].applicationIconBadgeNumber=badgeArray.count;
}
Related
My timer does not stop even if i am doing "invalidate" and "nil" after reading other links. My code is as below:
#property(nonatomic,strong) NSTimer *mytimer;
- (void)viewDidLoad {
[self performSelectorOnMainThread:#selector(updateProgressBar:) withObject:nil waitUntilDone:NO];
<do some other work>
}
- (void) updateProgressBar :(NSTimer *)timer{
static int count =0;
count++;
NSLog(#"count = %d",count);
if(count<=10)
{
self.DownloadProgressBar.progress= (float)count/10.0f;
}
else{
NSLog(#"invalidating timer");
[self.mytimer invalidate];
self.mytimer = nil;
return;
}
if(count <= 10){
NSLog(#"count = %d **",count);
self.mytimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(updateProgressBar:) userInfo:nil repeats:YES];
}
}
1) The timer goes on infinetly even when invalidating timer else condition is hit after count >10 and count keeps on incrementing.
2) i want to do this on a non-main thread . i want to continue in viewdidload() after starting the timer. How to do this ?
I visited other links on SO, all i understood was to call invalidate and nil on timer pointer. I am still facing problems. Could anyone tell me what i am missing here and what i can i do to run the updateProgressBar on background thread and update the progress bar ?
don't need to schedule a timer each time, schedule it once and timer will fire every second for example u can do like below,
- (void)viewDidLoad
{
[super viewDidLoad];
[self performSelectorOnMainThread:#selector(startTimerUpdate) withObject:nil waitUntilDone:NO]; //to start timer on main thread
}
//hear schedule the timer
- (void)startTimerUpdate
{
self.mytimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(updateProgressBar:) userInfo:nil repeats:YES];
}
- (void) updateProgressBar :(NSTimer *)timer{
static int count =0;
count++;
NSLog(#"count = %d",count);
if(count<=10)
{
//self.DownloadProgressBar.progress= (float)count/10.0f;
NSLog(#"progress:%f",(float)count/10.0f);
}
else
{
NSLog(#"invalidating timer");
[self.mytimer invalidate];
self.mytimer = nil;
return;
}
if(count <= 10){
NSLog(#"count = %d **",count);
}
}
I think you are scheduling timer multiple time. I think 10 time. just schedule time one time or if require many time then invalidate it that many time as schedule.
Update according to comment : Schedule timer from viewdidload and addobserver means notification on task. when your task will completed invalidate timer. and update your progress in selector method of timer so when you invalidate it it will automatically stop progress bar.
Second thing : you should invalidate timer before moving another viewcontroller also because this objects remains live untill invalidate.
Hope this will hellp :)
I want to my Webservice invoke once every 6 Hours.I am newer in iOS. Please help any help would be apperciated.I am stuck.
You can user NSTimer and schedule it for 6 hours
NSTimer *timer = nil;
timer = [NSTimer scheduledTimerWithTimeInterval:6*60*60 //6 hour
target:self
selector:#selector(performAction)
userInfo:nil
repeats:YES];
you can call using NSTimer. this is automatically called which time you set.
e.g.
NSTimer *timer= [NSTimer scheduledTimerWithTimeInterval:10.0(your time) target:self selector:#selector(someMethod) userInfo:nil repeats:YES];
-(void)someMethod
{
////API called here...
}
In ViewDidLoad
NSTimer *timer = [NSTimer timerWithTimeInterval:360.0 target:self selector:#selector(hideandview) userInfo:nil repeats:YES];
-(void)hideandview
{
////API called here...
}
You should save the last time in prefence (NSUserDefaults) when you make a call.
Whenever the app starts. Start timer and check current time with last saved time and get the difference.
I am having a banners array and displaying it in my custom cell. When user clicks on banner, I push a detailViewController and opens in-app browser.
I am changing banners after every 5 seconds. For that, I am using NSTimer to schedule the selector call. Everything works great.... Until, user clicks on banner and come back from detailViewController. When user comes back, NSTimer behaves really weird. It changes first banner after 5 seconds (as assigned) and then next banner is changed after 1 second and so on.
Her is the code I am using:
#pragma mark - User Methods
-(void) resetBannerRotationTimer {
[self.bannerTimer invalidate];
self.bannerTimer = nil;
self.timeInterval = 5.0f;
self.bannerTimer = [NSTimer scheduledTimerWithTimeInterval:self.timeInterval target:self selector:#selector(rotateBanner) userInfo:nil repeats:YES];
self.timeInterval = self.bannerTimer.timeInterval;
[[NSRunLoop currentRunLoop] addTimer:self.bannerTimer forMode:NSRunLoopCommonModes];
}
rotateBanner:
-(void) rotateBanner {
BannerCell *bannerCell = (BannerCell *)[self.dealsTableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
[bannerCell updateBanner];
}
In my updateBanner method, I am handeling UIPageControl to change pages. (I don't think that code needs to be posted).
I am calling resetBannerRotationTimer method in viewWillAppear method.
i think you are missing to fire your timer
add this line after timer scheduling
[self.bannerTimer fire];
I have gone through many sites but still no answer.
I have a method suppose void xyz(), which will get called automatically from a View Controller after every 3 seconds.
I have no idea what to use, do I have to use NSThread or PerformSelector.
Call this method from ViewDidLoad method.ViewDidLoad will when your view will be appear in iPhone device or Simulator.
[NSTimer scheduledTimerWithTimeInterval:3.0f target:self selector:#selector(runMethod) userInfo:nil repeats:YES];
-(void)runMethod
{
}
Something like this
-(void)xyz{
[self performSelectorInBackground:#selector(xyz) withObject:nil];
}
- (void)viewDidLoad {
[self performSelector:#selector(xyz) withObject:nil afterDelay:0.3];
}
Use NSTimer
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:3.0f target:self selector:#selector(xyz) userInfo:nil repeats:YES];
You should use NSTimer as mentioned by #mokujin.
Please visit https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSTimer_Class/Reference/NSTimer.html
I have a void function which just have NSLog(#"Call me"); in its body.
I call it in my view in every ten seconds by using
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:10 target:self selector:#selector(yourMethod) userInfo:nil repeats:YES];
But I want it to stop it after 5 iterations. However it goes to infinity. How can I do that?
1) Keep a global variable, that increments from 0 to 5.
int i = 0;
2) Incement this variable inside your timer function..
-(void) yourFunction:(NSTimer*)timer{
//do your action
i++;
if(i == 5){
[timer invalidate];
}
}
3) When creating timer
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:10
target:self
selector:#selector(yourMethod:) // <== see the ':', indicates your function takes an argument
userInfo:nil
repeats:YES];
You should take one counter, increment it every time when your method get called, count for 5 and then invalidate your timer using below code.
[timer invalidate];
To destroy the timer from the current loop, you should call [timer invalidate];
To determine five occurrences, you need to maintain a variable and increment its count each time. If it is equal to 5, call invalidate method.
First of all you need to declare an int and declare your NSTimer *timer, so we can stop it:
#interface AppDelegate : UIViewController {
int myInt;
NSTimer *timer;
}
To start the NSTimer you'll need to change just a bit of the code:
timer = [NSTimer scheduledTimerWithTimeInterval:10 target:self selector:#selector(yourMethod) userInfo:nil repeats:YES];
Inside your void function you can make the verification to check if the code's running after 5 iterations:
- (void)myVoid{
NSLog(#"Call Me");
if (myInt == 5) {
[timer invalidate];
timer = nil;
}
myInt++;
}