SDWebImage is not loading images from NSDictionary - ios

Question

I have a UITableView and I am loading some articles from an RSS file with keys: title, url and image url. I am trying to display the image in the UITableViewCell using the SDWebImage library and when I "load" the image through the dictionary that is downloaded from the RSS the image is not loaded. The url of the image though is loaded successfully and printed exactly before the load. But when I copy the printed url and paste it in another string trying to load that url it works. Below is my code.
NSString *urlofimage = [[feeds objectAtIndex:indexPath.row] objectForKey: #"image"];
NSLog(#"%#", urlofimage);
NSString *urlofimage1 = #"https://www.radioevros.gr/wp-content/uploads/2017/05/1495542572-74c82f60669c9db27cad113d22379c72.jpg";
[cell.imageview sd_setImageWithURL:[NSURL URLWithString:urlofimage] placeholderImage:[UIImage imageNamed:#"radio.png"]
options:SDWebImageRefreshCached];
So, my code doesnt seem to be wrong since I was working with the same code before and it was working. In the code above, the urlofimage1 is actually a printed url from the urlofimage. And if I do this:
[cell.imageview sd_setImageWithURL:[NSURL URLWithString:urlofimage1] placeholderImage:[UIImage imageNamed:#"radio.png"]
options:SDWebImageRefreshCached];
is working, but if I do this is not.
[cell.imageview sd_setImageWithURL:[NSURL URLWithString:urlofimage] placeholderImage:[UIImage imageNamed:#"radio.png"]
options:SDWebImageRefreshCached];
This is loaded inside :
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
Any ideas? Thank you.

Answer 1

I would suspect that you have some invalid characters in your dictionary, like a space at the end or something similar what is hard to spot.
Try encoding your received string first, and than create your NSURL instance.
NSString *urlofimage = #"https://www.radioevros.gr/wp-content/uploads/2017/05/1495542572-74c82f60669c9db27cad113d22379c72.jpg ";
NSCharacterSet *set = [NSCharacterSet URLQueryAllowedCharacterSet];
NSString *endcodedString = [urlofimage stringByAddingPercentEncodingWithAllowedCharacters:set];
NSLog(#"%#", [NSURL URLWithString:endcodedString]);
EDIT:
The encoding highlighted, that there are invalid characters at the end of the URL. Lets get rid of them with the following code:
NSString * urlofimage = #"https://www.radioevros.gr/wp-content/uploads/2017/05/1495542572-74c82f60669c9db27cad113d22379c72.jpg ";
NSString *trimmedString = [urlofimage stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSLog(#"%#", [NSURL URLWithString:trimmedString]);