iphone UIProgressView disappears on update

Question

Im updating a UIProgressView called “ammo”. When i update the progress the UIProgressView disappears from the UIView like its being hidden or moved behind another view.

Code

- (void)updateAmmo:(float) inputAmmo capacity:(float)inputCapacity{

   //Calculate the progress value
   float value = inputAmmo/inputCapacity;

   //If nothing has changed don’t update
   if(value != ammo.progress){
      [ammo setProgress:value];
   }
}

Things I have checked

Checked to see if it is being hidden.
Brought the UIProgressView to the front.
Tried [ammo setProgress: ammo.progress-0.01]; this breaks it aswell
Inserting a value directly works [ammo setProgress: 0.950000];
Tried adding [ammo setNeedsDisplay];

Logging value extracts

2011-07-23 15:15:34.659 XXXXXXX[2399:207] value - 1.000000
2011-07-23 15:15:34.659 XXXXXXX[2399:207] value - 0.950000
2011-07-23 15:15:34.712 XXXXXXX[2399:207] value - 0.900000

Thanks in advance for any assistance.

Vijay-Apple-Dev.blogspot.com · Answer 1 · 2011-07-23T15:06:22.300

0

if u use IB for progress creation checkout u r connect with them.

i suspect about ur value property goes to immediately to 0 or below 0

        - (void)updateAmmo:(float) inputAmmo capacity:(float)inputCapacity{


            float value = inputAmmo/inputCapacity;




            if(value != [ammo progress]){
                [ammo setProgress:value];
            }
        }

edited Jul 23 '11 at 15:06

answered Jul 23 '11 at 14:42

Vijay-Apple-Dev.blogspot.com

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and i suspect about ur value property goes to immediately to 0 – Vijay-Apple-Dev.blogspot.com Jul 23 '11 at 14:45
Thanks for the reply but the if statement is not the cause. I gave what you suggested above a go but it did not work. However I do not think the problem is with the if statement just detects a change in value. – woot586 Jul 23 '11 at 14:48
The logging extracts are from the value variable which decrease by 0.05 – woot586 Jul 23 '11 at 14:50
Sorry I don’t follow? The logging shows it starts at 1.00000 then 0.950000, 0.900000 etc... Also if it reaches 0 surely the bar would be empty and not completely disappear from the screen? – woot586 Jul 23 '11 at 15:01
if u use IB for progress creation checkout u r connect with them. – Vijay-Apple-Dev.blogspot.com Jul 23 '11 at 15:06

iphone UIProgressView disappears on update

1 Answers1