Im new in unity and c# - i tried to make a image fill amount decrease.

Questions & Answers
1

I do not know what I’m doing wrong , here is my code , if anyone can help me , I thank.

public float waittime 10.0f;

public Void Tocar()
goAudioSource.Play ();

	while (goAudioSource.isPlaying){
                tempo.GetComponent<Image>().fillAmount -= 1.0f/waittime * Time.deltaTime;				
			    
	if(tempo.GetComponent<Image>().fillAmount == 0.0f){
					goAudioSource.Stop ();
	}

}

2

while (goAudioSource.isPlaying){
tempo.GetComponent().fillAmount -= 1.0f/waittime * Time.deltaTime;

     if(tempo.GetComponent<Image>().fillAmount == 0.0f){
                     goAudioSource.Stop ();
     }

here you are decreasing to 0 in single Update cycle. what you want is animating effect.
for that change while with if so that in every frame it will decrease a little.

3

It does not work right . It decreases only once. Here is my complete code with the if .

public class microfone : MonoBehaviour {

    public int contador;
    public int cont;
    public string bot;
	public float waittime = 1.0f;
   	private bool micConnected = false;  
    Text  tocarbotao;
	private int minFreq;  
	private int maxFreq;

void Start()
{
contador = PlayerPrefs.GetInt (“verdade”); //Contador inicialmente recebe o valor de numero de perguntas
cont=contador; // O cont vai ser igual ao contador
PlayerPrefs.SetInt(“contador”,cont);

	tempo.GetComponent<Image>().fillAmount = 0;
	  
		if(Microphone.devices.Length <= 0)  
		{  
			Debug.LogWarning("Sem Microfone!");  
		}  
		else   
		{  
			micConnected = true;  
			Microphone.GetDeviceCaps(null, out minFreq, out maxFreq);  

			if(minFreq == 0 && maxFreq == 0)  
			{  
				maxFreq = 44100;  
			}  

			goAudioSource = this.GetComponent<AudioSource>();  
			}  
			
	}  

	public void Tocar()
 {
	tocarbotao = gameObject.GetComponent<Text> ();
	bot = tocarbotao.text;
	        
	if (cont > 0){ 
		if (bot == "GRAVAR") {	
			
			if (micConnected) {  
				
				if (!Microphone.IsRecording (null)) {  
					goAudioSource.clip = Microphone.Start (null, true, 20, maxFreq);  
					gameObject.GetComponent<Text> ().text = "ANALISAR";
					}  
			} 
		} else { 
			gameObject.GetComponent<Text> ().text = "GRAVAR"; 
			Microphone.End (null);  
			goAudioSource.Play (); 
			
			if(goAudioSource.isPlaying){
                tempo.GetComponent<Image>().fillAmount -= 1.0f/waittime * Time.deltaTime;				
			    
			if(tempo.GetComponent<Image>().fillAmount == 0.0f){
					goAudioSource.Stop ();
					gameObject.GetComponent<Text> ().text = "GRAVAR";
				}
			}
		cont=cont-1;	
		}  
		if (cont == 0){
			gameObject.GetComponent<Text> ().text = "FIM";
	}