如何慢慢填充NSProgressIndicator（进度条）从0到100？

Question

Task : Take Progress bar (NSProgressIndicator) from 0 to 100 smoothly.

Problem : Progress bar is getting 0 to 100 but not smoothly.

What I have done as yet:

    // scan click on which the prgress should start
-(void)ScanNowClick:(id)sender
{
        // setting initial value of progress bar
        [progressbar setDoubleValue:0];
        // starting timer
        [NSTimer scheduledTimerWithTimeInterval:0.5
                                         target:self
                                       selector:@selector(callAfter10sec:)
                                       userInfo:nil
                                        repeats:YES];  
}

// timer that will update progress bar
-(void)callAfter10sec:(NSTimer *)time {

    double value = [progressbar doubleValue]+10;

    [[progressbar animator] setDoubleValue:value];

    if(value >= 100)
    {
       [time invalidate];
    }
}

/// layer is also set

Answer 1

You should use CADisplayLink and not NSTimer when dealing with UI related updates.

The link is called 60 times per second (per the refresh rate of the screen)

In the callback you should calculate the proportion to advance the view