download image make and update table view after downloading - ios

Question

I am working on an app which is image downloading. Images are of different sizes. I want to download image async and update table view when image downloading. Also need to clear cache on a time interval.
Please suggest me how to implement. I have seen SDwebimagecache but it is crashing on image downloading.

Answer 1

I hope it's can help you. I use SDWebImage with my all (ARC)projects.
using :
add your viewcontroller : #import "UIImageView+WebCache.h"
[yourImageView setImageWithURL:[NSURL URLWithString:#"ImageUrl"]];
you need to add MapKit and ImageIO to the project. if you didn't add
To do that:
Click on the project at the top of the project navigator in Xcode
Select the 'Build Phases' tab.
Open up the 'Link Binary with Libraries' box.
Click the '+'.
Add MapKit and ImageIO frameworks.

Answer 2

I have used the core data and AFNetworking to achieve the same thing, find below my code
UserBasicInfo* userBasicInfo = [[UserBasicInfo findByAttribute:#"userId" withValue:#(chatUser)] objectAtIndex:0];;
if (userBasicInfo.userImage == nil) {
__weak LGMessageBoxCell *weakCell = cell;
[cell.userImage setImageWithURLRequest:[[NSURLRequest alloc] initWithURL:[NSURL URLWithString:userBasicInfo.imageUrl]]
placeholderImage:[UIImage imageNamed:#"facebook-no-user.png"]
success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image){
weakCell.userImage.image = image;
[weakCell setNeedsLayout];
[MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext) {
UserBasicInfo* userBasicInfo = [[UserBasicInfo findByAttribute:#"userId" withValue:#(chatUser) inContext:localContext] objectAtIndex:0];
userBasicInfo.userImage = UIImagePNGRepresentation(image);
} completion:^(BOOL success, NSError *error) {
NSLog(#"%#",[error localizedDescription]);
}];
}
failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error){
}];
} else {
cell.userImage.image = [UIImage imageWithData:userBasicInfo.userImage];
}