If and else If priority if both exist - ios

Question

I have a query on a Cloud CKRecord, which checks to see if a documents exists (i.e. has been uploaded as an CKAsset) and if not checks if a URL exists (i.e. has been uploaded as a String). All works well if either exist on their own for a given record, however if both exist when clicking on the link nothing happens.
I feel it is something to do with the if and else if statements -
if filename1 != nil {
let asset1 = record.object(forKey: "courseDocument1") as? CKAsset
let filename = record.object(forKey: "courseDocument1Filename") as! String
let path = (NSTemporaryDirectory() as NSString).appendingPathComponent(filename)
let doc1Data : NSData? = NSData(contentsOf:(asset1?.fileURL)!)
do {
try doc1Data!.write(to: URL(fileURLWithPath: path), options: .atomic)
let url = URL(fileURLWithPath: path)
let urlRequest = URLRequest(url: url)
self.courseDoc1WebView?.loadRequest(urlRequest)
self.venueDocButton1.setTitle(cseDocument1,for: [])
self.venueDocButton1.isHidden = false
self.courseDocumentLabel.isHidden = false
} catch {
print(error)
}
} else if cseDocument1URL != nil && filename1 == nil {
let url1 = URL (string: cseDocument1URL!)
let request1 = URLRequest(url: url1! as URL );
self.courseDoc2WebView.loadRequest(request1 as URLRequest);
self.venueDocButton1.setTitle(cseDocument1,for: [])
self.venueDocButton1.isHidden = false
self.courseDocumentLabel.isHidden = false
} else {
print("No Document Found")
}
Any thoughts?

Answer 1

This turned out to be a simple typo rather than logic -
self.courseDoc2WebView.loadRequest(request1 as URLRequest);
which should actually be -
self.courseDoc1WebView.loadRequest(request1 as URLRequest);
This was solved by printing responses and using the debugger - thanks Phillip Mills
Duncan C, you make a good point too - thank-you.