title: Display PercentDone UIProgressView in UiLabel
body: <p>I have a button connected to a UiProgressView, has only the function to count the clicks on the button ... I need to show the percentage of completion in a UILabel .. Can you tell me which method is better?</p>
  
  <p>To make you understand the function I show you the code of the IBAction</p>
  
  <pre><code>- (IBAction)FFAddCFU:(id)sender {
  if (FFVariabileNumerica_CFU &gt;= 30)
  return;
  FFVariabileNumerica_CFU++ ;
  [FFCFULabel setText:[NSString stringWithFormat:@"%d", FFVariabileNumerica_CFU]];
  
  if(FFProgressBar.progress == 0.50 || FFProgressBar.progress == 0.77 ){
  [ FFProgressBar setProgress : FFProgressBar.progress +0.25 ];
  
  } else {
  if (FFProgressBar.progress &gt; 0.76) {
  [ FFProgressBar setProgress : FFProgressBar.progress +0.25 ]; }
  }
  }
  </code></pre>