How to display image on UIImageView using URL and NSString in ios?

Question

I want to display image on UIImageView using URL and NSString. I am unable to show image.

My code is:

UIImageView *view_Im         


        

Answer 1

For Swift 3.0

class ImageLoader {


var cache = NSCache<AnyObject, AnyObject>()

class var sharedLoader : ImageLoader {
    struct Static {
        static let instance : ImageLoader = ImageLoader()
    }
    return Static.instance
}

func imageForUrl(urlString: String, completionHandler:@escaping (_ image: UIImage?, _ url: String) -> ()) {

    DispatchQueue.global().async {
        let data: NSData? = self.cache.object(forKey: urlString as AnyObject) as? NSData

        if let goodData = data {
            let image = UIImage(data: goodData as Data)
            DispatchQueue.main.async {
                completionHandler(image, urlString)
            }
            return
        }

        let url:NSURL = NSURL(string: urlString)!
        let task = URLSession.shared.dataTask(with: url as URL) {
            data, response, error in
            if (error != nil) {
                print(error?.localizedDescription)
                completionHandler(nil, urlString)
                return
            }

            if data != nil {
                let image = UIImage(data: data!)
                self.cache.setObject(data as AnyObject, forKey: urlString as AnyObject)
                DispatchQueue.main.async {
                    completionHandler(image, urlString)
                }
                return
            }
        }
        task.resume()
    }

}
}

Usage

ImageLoader.sharedLoader.imageForUrl(urlString: imageUrl as! String) { (image, url) in
            self.imageView.image = image
}

Answer 2

try this

NSString* combinedString = [stringUrl1 stringByAppendingString stringUrl2];

Answer 3

for showing image from url you can try this...

 [ImageViewname setImageWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",your url]]];

for showing image locally from app you can try this....

 ImageViewname.image = [UIImage imageNamed:@"test.png"];

I hope this will help you.

happy coding...

Answer 4

    NSString *url_Img1 = @"http://opensum.in/app_test_f1";
    NSString *url_Img2 = @"45djx96.jpg";

    NSString *url_Img_FULL = [url_Img1 stringByAppendingPathComponent:url_Img2];

    NSLog(@"Show url_Img_FULL: %@",url_Img_FULL);
    view_Image.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:url_Img_FULL]]]; 

try this.

Answer 5

try AsyncImageView for your this requirement see this example

1. AsyncImageView

Answer 6

I tested your url and found the issue.

The issue is with this line:

NSString *url_Img1 = @"http://opensum.in/app_test_f1/;";

You are adding a ; at last of the url string.

So when you concatinate two strings it'll look like: http://opensum.in/app_test_f1/;45djx96.jpg

That is not a valid url.

The correct url is : http://opensum.in/app_test_f1/45djx96.jpg

Change the code like:

 NSString *url_Img1 = @"http://opensum.in/app_test_f1/";

It'll work.