Swift通过组合字符串从url加载图像

Question

我有detailTitle，detailDesc字符串的工作代码，但我的detailImage字符串没有显示我的UIImage。我的代码在。

的ViewController这里来我的字符串的DetailView控制器

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 
    let subcatVC = self.storyboard?.instantiateViewControllerWithIdentifier("Detail") as! DetailViewController 
    subcatVC.detailTitle = self.arrayCategory[indexPath.row][API_PARAM_CAT_NAME] as! String 
    subcatVC.detailDesc = self.arrayCategory[indexPath.row][API_PARAM_DESC_NAME] as! String 
    subcatVC.detailImage = self.arrayCategory[indexPath.row][API_PARAM_CAT_IMAGE] as! String 
    _ = UINavigationController(rootViewController: subcatVC) 
    self.navigationController?.pushViewController(subcatVC, animated: false) 

    NSLog("%@", self.arrayCategory[indexPath.row][API_PARAM_CAT_IMAGE] as! String); 

} 

DetailViewController

class DetailViewController: UIViewController { 

    var detailTitle:String? 
    var detailDesc:String? 
    var detailImage:String? 




    @IBOutlet weak var textim: UILabel! 
    @IBOutlet weak var textbig: UITextView! 
    @IBOutlet weak var imagetbig: UIImageView! 


override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) { 
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil) 
} 

required init?(coder aDecoder: NSCoder) { 
    super.init(coder: aDecoder) 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 

    textbig.text = detailDesc 
    textim.text = detailTitle 


    if let url = detailImage { 
     load_image(url) 
    } 


func load_image(urlString:String) 
{ 




    let imgURL: NSURL = NSURL(string: urlString)! 
    let request: NSURLRequest = NSURLRequest(URL: imgURL) 

    let session = NSURLSession.sharedSession() 
    let task = session.dataTaskWithRequest(request){ 
     (data, response, error) -> Void in 

     if (error == nil && data != nil) 
     { 
      func display_image() 
      { 
       self.imagetbig.image = UIImage(data: data!) 

      } 

      dispatch_async(dispatch_get_main_queue(), display_image) 
     } 

    } 

    task.resume() 
} 

我需要的;

顶级代码工作良好，但不显示图像，所以我需要为我的完整图像url组合字符串。

NSLog("%@",detailImage) Output = 23423434.jpg 

我的基本URL字符串：

let URL_API_HOST2:String = "http://www.bla.com/MyImages/" 

我想结合detailImage和URL_API_HOST2

而且我想展示相结合detailImage串等;

http://www.bla.com/MyImages/23423434.jpg 

我需要你的帮助。 TY

Answer 1

我不知道在您的基础URL字符串声明，但我不明白为什么你不能简单地在连接字符串：

例如，而不是：

if let url = detailImage { 
    load_image(url) 
} 

你可以做

if let url = detailImage { 
    load_image(URL_API_HOST2 + url) 
}