How do I download an image from a URL and save it to my computer? - objective-c

Question

How would I download an image from a URL, and have that saved to the computer using Objective-C? This is what I got so far:
NSString *documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
UIImage *imageFromURL = [self getImageFromURL:#"https://www.google.com/images/srpr/logo11w.png"];
[self saveImage:imageFromURL withFileName:#"Google Logo" ofType:#"png" inDirectory:documentsDirectoryPath];
UIImage *imageFromWeb = [self loadImage:#"Google Logo" ofType:#"png" inDirectory:documentsDirectoryPath];
Xcode complains about UIIMage, trying to replace with NSImage. It also complains about an undeclared identifier 'self'.
I need to make an HTTP call to perform this as well. Explain this to me like I'm 5.

Answer 1

Here is the code to Save the image into document Directory.
-(void)saveImagesInLocalDirectory
{
NSString * documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *imgName = #"image.png";
NSString *imgURL = #"www.example.com/image/image.png";
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *writablePath = [documentsDirectoryPath stringByAppendingPathComponent:imgName];
if(![fileManager fileExistsAtPath:writablePath]){
// file doesn't exist
NSLog(#"file doesn't exist");
if (imgName) {
//save Image From URL
[self getImageFromURLAndSaveItToLocalData:imgName fileURL:imgURL inDirectory:documentsDirectoryPath];
}
}
else{
// file exist
NSLog(#"file exist");
}
}
-(void) getImageFromURLAndSaveItToLocalData:(NSString *)imageName fileURL:(NSString *)fileURL inDirectory:(NSString *)directoryPath {
NSData * data = [NSData dataWithContentsOfURL:[NSURL URLWithString:fileURL]];
NSError *error = nil;
[data writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#", imageName]] options:NSAtomicWrite error:&error];
if (error) {
NSLog(#"Error Writing File : %#",error);
}else{
NSLog(#"Image %# Saved SuccessFully",imageName);
}
}
And this is the one method code..
-(void)saveImagesInLocalDirectory
{
NSString * documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *imgName = #"image.png";
NSString *imgURL = #"www.example.com/image/image.png";
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *writablePath = [documentsDirectoryPath stringByAppendingPathComponent:imgName];
if(![fileManager fileExistsAtPath:writablePath]){
// file doesn't exist
NSLog(#"file doesn't exist");
//save Image From URL
NSData * data = [NSData dataWithContentsOfURL:[NSURL URLWithString: imgURL]];
NSError *error = nil;
[data writeToFile:[documentsDirectoryPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#", imgName]] options:NSAtomicWrite error:&error];
if (error) {
NSLog(#"Error Writing File : %#",error);
}else{
NSLog(#"Image %# Saved SuccessFully",imgName);
}
}
else{
// file exist
NSLog(#"file exist");
}
}

Answer 2

This is my solution!
+(BOOL)downloadMedia :(NSString*)url_ :(NSString*)name{
NSString *stringURL = url_;
NSURL *url = [NSURL URLWithString:stringURL];
NSData *urlData = [NSData dataWithContentsOfURL:url];
if ( urlData )
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [NSString stringWithFormat:#"%#/%#", documentsDirectory,name];
[urlData writeToFile:filePath atomically:YES];
return YES;
}
return NO;
}
+(UIImage*)loadMedia :(NSString*)name{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *getImagePath = [documentsDirectory stringByAppendingPathComponent:name];
UIImage *img_ = [UIImage imageWithContentsOfFile:getImagePath];
return img_;
}