iPhone UIProgressView在更新时消失

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.

Answer 1

if u use IB for progress creation checkout ur 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];
            }
        }