imageView blank when set with URL? - ios

Question

I'm using the below to set my imageView with a url (located in path). Yes, the URL data is returned successfully, but for some reason, my imageView remains blank (just white?)
And yes, I've hooked up my imageView property... Any idea what's wrong? Should I be using a different block of code to accomplish this?
Viewcontroller.m
NSMutableDictionary *viewParamsDogs = [NSMutableDictionary new];
[viewParamsDogs setValue:#"mydogs" forKey:#"view_name"];
[DIOSView viewGet:viewParamsDogs success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.dogData = [responseObject mutableCopy];
[operation responseString];
NSDictionary *dic = [responseObject valueForKey: #"field_pet_photo_path"];
NSArray *arr = [dic valueForKey: #"und"];
NSDictionary *dic2= [arr objectAtIndex : 0];
NSString *path = [NSString stringWithFormat:#"%#", [dic2 valueForKey: #"safe_value"]];
NSLog(#"This is path %#", path);
if([path length]>0) {
NSURL *url = [NSURL URLWithString:path];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *image = [UIImage imageWithData:data];
self.dogimageView.image = image;
} else {
NSString *ImageURL = #"http://url.ca/paw.png";
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:ImageURL]];
self.dogimageView.image = [UIImage imageWithData:imageData];
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failure: %#", [error localizedDescription]);
}];
Path:
[5111:1673330] This is path (
"http://url.com/default/files/stored/1460659054.jpg"
)
NSLog(#"This is path %#, %#", path, NSStringFromClass(path.class)); returns:
2016-04-14 13:18:39.590 [5225:1700657] This is path (
"http://url.com/default/files/stored/1460659054.jpg"
), __NSCFString

Answer 1

I recommend usage of AFNetworking https://github.com/AFNetworking/AFNetworking for all networking connect features.
Import UIImageView+AFNetworking.h at beginning of file
#import "UIImageView+AFNetworking.h"
Get path from dic2
NSString *path = dic2[#"safe_value"];
Check if path is a string
if (![path isKindOfClass:[NSString class]]) {
return;
}
Create a NSURL object from string
NSURL *imageUrl = [NSURL URLWithString:path];
Set imageUrl to UIImageView
[self.dogimageView setImageWithURL:imageUrl];
You could check the full code in my gist https://gist.github.com/MaciejGad/fa8cb80dfc73ea55edeedb75418ea2ec
Edit:
the reason of error was the path that was set as:
NSString *path = #"(
\"http://url.com/default/files/stored/1460659054.jpg\"
)";
to change to normal URL we need to trim it:
NSMutableCharacterSet *characterSetToTrim = [NSMutableCharacterSet characterSetWithCharactersInString:#"()\""];
[characterSetToTrim formUnionWithCharacterSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
path = [path stringByTrimmingCharactersInSet:characterSetToTrim];
after this trimming path should be http://url.com/default/files/stored/1460659054.jpg

Answer 2

Try like this,
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *image = [UIImage imageWithData:data];
self.dogimageView.image = [[UIImageView alloc] initWithImage:image];
and You can use great library SDWebImage for caching image. When image comes from server use of this library is very helpful. Hope this will work.
Update :
NSString *path = [NSString stringWithFormat:#"%#", [dic2 valueForKey: #"safe_value"]];
NSURL *url = [NSURL URLWithString:path];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *image = [UIImage imageWithData:data];
self.dogimageView.image = [[UIImageView alloc] initWithImage:image];
Try this. :)

Answer 3

Try using dataWithContentsOfURL:options:error: instead and look if there is any error message there