Hi all im using progress bar for indicating the status of xml parsing in my app.but it is not showing the step by step updation,instead the progress bar is loading after the entire xml parsing is over,till that time it is stuck and not showing any progress.how to solve this issue.can anyone help me please.
I use the below code
IBOutlet UIProgressView * threadProgressView;
threadProgressView.progress = 0.0;
[self performSelectorOnMainThread:#selector(makeMyProgressBarMoving) withObject:nil waitUntilDone:NO];
- (void)makeMyProgressBarMoving
{
float actual = [threadProgressView progress];
if (actual < 1) {
threadProgressView.progress = actual + ((float)1/(float)10);
[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:#selector(makeMyProgressBarMoving) userInfo:nil repeats:NO];
}
else{
/* something else */
}
}
Create a timer on the main thread for every 1/10th of a second. Have it hit your "makeMyProgressBarMoving" function.
myTimer = [NSTimer scheduledTimerWithTimeInterval:.1 target:self selector:#selector(makeMyProgressBarMoving) userInfo:nil repeats:YES];
Then edit your function to look like this:
- (void)makeMyProgressBarMoving {
float actual = [threadProgressView progress];
if (actual < 1) {
threadProgressView.progress = actual + ((float)1/(float)10);
return;
}
//if you got here that means the progress view is greater than 1 so now you can kill your timer that you had running every 1/10th of a second.
[myTimer invalidate];
}
Related
I want to display an image for 5-6 secs and then link a slider to it to show increasing time. That is say if time is 0 seconds, slider is at extreme left and if Timer is 1 seconds slider moves appropriately towards right and if Timer is 3 seconds than slider is in the middle and as time increases gradually 4 -5 seconds it moves right and at 6 seconds its on its extreme right. Can you guide me on this
Use below one
timerForSlider = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(updateSlider) userInfo:nil repeats:YES];//timerForSlider in .h file
-(void)updateSlider
{
[slider setValue:slider.value+1];
if(slider.value==6)
{
[timerForSlider invalidate];
}
}
In XIB set slider minimumVal =0; MaximumVal=6; initialVal = 0;
this is timer callback (selector):
-(void) timer {
//dSliderValue - step of slider moveing. set it to 2
if (slider.value+dSliderValue <= 60) [slider setValue:slider.value+dSliderValue];
else {
[t invalidate];
//any other code here, on timer stopping
}
}
this is timer (NSTimer *t). call it on start image showing:
[slider setMaximumValue:60];
[slider setValue:0];
dSliderValue = 2;
t = [NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:#selector(timer) userInfo:nil repeats:YES];
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Change the time interval of a Timer
So I have a timer:
timer=[NSTimer scheduledTimerWithTimeInterval:2 target:self selector:#selector(createNewImage) userInfo:nil repeats:YES];
And I would like that the timer decrease every ten seconds, that scheduledTimerWithTimeInterval goes to 1.5 after ten seconds then to 1.0 after 10 seconds... Is it possible to do this, and if it is possible, how can I do it?
You can't modify a timer after you created it. To change the timer interval, invalidate the old timer and create a new one with the new interval.
You don't have to use several timers, all you have to do is add a variable to use for the time interval, then create a method that invalidates the timer, changes the variable and starts the timer again. For instance you could make a method that starts the timer.
int iTimerInterval = 2;
-(void) mTimerStart {
timer = [NSTimer scheduledTimerWithTimeInterval:iTimerInterval target:self selector:#selector(createNewImage) userInfo:nil repeats:YES];
}
-(void) mTimerStop {
[timer invalidate];
iTimerInterval = iTimerInterval + 5;
[self mTimerStart];
}
This would be the simple way to decrease the timer interval and keep the timer going, but I would personally prefer using the one below, because it makes sure that the timer has only ran once, that way it will not duplicate the instance, forcing your app to become glitchy and it also makes things easier for you.
int iTimerInterval = 2;
int iTimerIncrementAmount = 5;
int iTimerCount;
int iTimerChange = 10; //Variable to change the timer after the amount of time
bool bTimerRunning = FALSE;
-(void) mTimerToggle:(BOOL)bTimerShouldRun {
if (bTimerShouldRun == TRUE) {
if (bTimerRunning == FALSE) {
timer = [NSTimer scheduledTimerWithTimeInterval:iTimerInterval target:self selector:#selector(mCreateNewImage) userInfo:nil repeats:YES];
bTimerRunning = TRUE;
}
} else if (bTimerShouldRun == FALSE) {
if (bTimerRunning == TRUE) {
[timer invalidate];
bTimerRunning = FALSE;
}
}
}
-(void) mCreateNewImage {
//Your Code Goes Here
if (iTimerCount % iTimerChange == 0) { //10 Second Increments
iTimerInterval = iTimerInterval + iTimerIncrementAmount; //Increments by Variable's amount
[self mTimerToggle:FALSE]; //Stops Timer
[self mTimerToggle:TRUE]; //Starts Timer
}
iTimerCount ++;
}
-(void) mYourMethodThatStartsTimer {
[self mTimerToggle:TRUE];
}
I didn't finish all of the coding, but this is most of what you will need. Just change a few things and you'll be good to go!
You will need a set or sequence of timers, one for each different time interval. Stop/invalidate one timer and start the next timer when you want to change to the next time interval in your time sequence.
I'm looking for the cleanest way to have a countdown timer fire when a user hits the 'take picture' button. Is there any easy way to do this?
One solution I'm thinking of is to just have a label that updates every second, but is there a way to get it working like Photobooth?
Also, at the last second before the photo is about to be taken I'd like for an image to be displayed briefly while the image is being taken. How can I go about this?
Any help would be great, thanks!
- (IBAction)takePicture:(id)sender {
theTimer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:#selector(updateLabel:) userInfo:nil repeats:NO];
}
- (void)updateLabel:(NSTimer *)timer {
_timeLabel.text = [NSString stringWithFormat:#"%d", time];
time = time - 1;
if (time == 0) {
[theTimer invalidate];
[_timeLabel performSelector:#selector(setText:) withObject:#"Photo taken!" afterDelay:1.0];
//Code for image shown at last second
} else {
theTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(updateLabel:) userInfo:nil repeats:NO];
}
}
Hope this helps ;)
I'm struggling with this. I saw some code where you can do this :
- (void)startTimer {
pauseTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(doActions) userInfo:nil repeats:YES];
}
Then call it in doActions.
Problem is i want to call it while a button is being pressed, and do actions is an IBaction. I keep getting a sigAbrt.
Can someone give me some sample code where you cay change a label from 'on' to 'off' every 1 second while a button is being pressed?
EDIT
i mean if doActions looks like this
- (IBAction) doActions {
for(int j; j<100; j++){
theLabel.hidden != theLabel.hidden;
//Does invalidate timer go here?
}
}
It still isn't clear to me, what you're trying to accomplish: I would have found it much easier, if you simply had it written down in plain english, after all.
That said, here's what I think will get you where you want to go:
// Assuming ivars:
// NSTimer* toggleTimer
// NSUInteger toggleCount
- (void)toggleTimerFired:(NSTimer*)timer
{
if ( toggleCount++ >= 100 ) {
[self stopToggling:self];
return;
}
// do whatever you need to do a hundred times here
}
- (IBAction)stopToggling:(id)sender
{
[toggleTimer invalidate], toggleTimer = nil; // you don't want dangling pointers...
// perform any other needed house-keeping here
}
- (IBAction)startToggling:(id)sender
{
[self stopToggling:self]; // if `startToggling:` will NEVER be called when a timer exists, this line CAN be omitted.
toggleCount = 0;
toggleTimer = [NSTimer scheduledTimerWithTimeInterval:1. target:self selector:#selector(toggleTimerFired:) userInfo:nil repeats:YES];
}
Depending on what exactly you want to do, startToggling: needs to be sent on either touchUpInside or touchDown. In the second case, stopToggling: probably needs to be called on any touchUp... event of the button.
- (void)startTimer {
pauseTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(doActions) userInfo:nil repeats:YES];
}
- (void) doActions {
theLabel.hidden != theLabel.hidden;
}
in my application i have an UILabel showing a time updated every second.
I have also draggable objects in the screen.
When I hide the label or i stop the timer everything is perfect but when i start the timer the animation performance of dragging objects go down.
I put the UILabel updating in a separate thread but no luck.
I need help friends :)
This is my code:
self.timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(onTimer:) userInfo:nil repeats:YES];
-(void) onTimer:(NSTimer *)timer;
{
timeInterval ++;
int hours = (int)timeInterval / 3600;
int minutes = (timeInterval %3600)/ 60;
int seconds = ((timeInterval%3600)%60);
NSString *timeDiff = [NSString stringWithFormat:#"%d:%02d:%02d", hours,minutes,seconds];
[NSThread detachNewThreadSelector:#selector(setText:) toTarget:self.time withObject:timeDiff];
}