URL이미지 저장

NSString * yourImageUrl = [@"URL" stringByAppendingString:yourfile];

NSString * imageName = @"yourImage.png";

        

NSURL * yourUrl = [NSURL URLWithString:yourImageUrl];

NSData * yourdata = [NSData dataWithContentsOfURL:yourUrl];

UIImage * image = [[UIImage alloc] initWithData:yourdata];
UIImage * scaledImage = [image scaleToSize:CGSizeMake(MYIMAGEWIDTH, MYIMAGEHEIGHT)];  
//scaleToSize Method는 따로 정의

        

NSData * _imageData = [NSData dataWithData:UIImagePNGRepresentation(scaledImage)]; 

if (![self writeApplicationData:_imageData toFile:imageName]) { 

NSLog(@"Save failed!"); 

}

 

////

- (BOOL) writeApplicationData:(NSData *)data toFile:(NSString *)fileName

{ 

    

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 

    NSString *documentsDirectory = [paths objectAtIndex:0]; 

    

    if (!documentsDirectory) { 

        NSLog(@"Documents directory not found!"); 

        return NO; 

    } 

    

    NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName]; 

    return ([data writeToFile:appFile atomically:YES]); 

}