當應用程序來自背景時，酒吧按鈕項不起作用

Question

當我點擊同一個酒吧按鈕項時，我嘗試執行不同的代碼。每當我點擊背景圖片變化。我檢查這是哪一個，然後選擇要執行的代碼。這有效，但當應用程序來自後臺的按鈕不工作。一些想法？

這是代碼viewDidLoad中：

[self.btnOnOff setImage:[UIImage imageNamed:@"iconON.png"]]; 
self.btnOnOff.tintColor = [UIColor greenColor]; 

這是當用戶點擊

-(IBAction)btnOnOffAction:(id)sender 
{ 
UIImage* selectedImgOFF = [UIImage imageNamed:@"iconOFF.png"]; 
UIImage* selectedImgON = [UIImage imageNamed:@"iconON.png"]; 

// UNAVAILABLE 
if ([self.btnOnOff.image isEqual:selectedImgON]) 
{ 
    // Ask user confirmation 
    self.alertConfirmationStatus = [[UIAlertView alloc] initWithTitle:@"Status of app" message:@"Do you want to switch to UNAVAILABLE ?" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil]; 
    [self.alertConfirmationStatus show]; 
} 

// AVAILABLE 
else if ([self.btnOnOff.image isEqual:selectedImgOFF]) 
{ 
    // Ask user confirmation 
    self.alertConfirmationStatus = [[UIAlertView alloc] initWithTitle:@"Status of app" message:@"Do you want to switch to \n AVAILABLE ?" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil]; 
    [self.alertConfirmationStatus show]; 
} 

else {} 

}

預先感謝您

Answer 1

嘗試移動方法調用您的密碼在

-(void)viewDidAppear:(BOOL)animated 
{ 

} 

或者對你的方法提一些參考。