How to use sdimage in uiimage caching? - ios

Question

Anyway to handle or display UIImage with caching and with placeholder?
I have found one answer from stack exchange but it didnot work for me given below the link :
Best way to cache images on ios app?
Notes: I dont have any URL because i get image object of PHIMAGE asset library.

Answer 1

You can use SDWebImage
It is very simple to display and cache image.
[imageView sd_setImageWithURL:[NSURL URLWithString:#"http://www.image_url.com"]
placeholderImage:[UIImage imageNamed:#"placeholder.png"]];

Answer 2

You can use a very usefull library called SDWebImage
SDWebImage automagically cache all your images when you provide a valid URL with the sd_setImageWithURL. So the next time you call it, will use the cache system instead of re-download the image.
Example to implement in a UIImageView from their github:
// Here we use the new provided sd_setImageWithURL: method to load the web image
[cell.imageView sd_setImageWithURL:[NSURL URLWithString:#"http://www.domain.com/path/to/image.jpg"]
placeholderImage:[UIImage imageNamed:#"placeholder.png"]];

Answer 3

There was a problem of smoothing an all image while scroll the table but there is an issue of reload the cell not the caching problem i solved this issue.
I get an image one by one from local identifier which is provided by PHAsset framework and display that image into cell.
For reference Code:
PHFetchResult *savedAssets = [PHAsset fetchAssetsWithLocalIdentifiers:#[your local identifier] options:nil];
[savedAssets enumerateObjectsUsingBlock:^(PHAsset *asset, NSUInteger idx, BOOL *stop) {
//this gets called for every asset from its localIdentifier you saved
PHImageRequestOptions * imageRequestOptions = [[PHImageRequestOptions alloc] init];
imageRequestOptions.synchronous = YES;
imageRequestOptions.deliveryMode = PHImageRequestOptionsResizeModeFast;
[[PHImageManager defaultManager]requestImageForAsset:asset targetSize:CGSizeMake(50,50) contentMode:PHImageContentModeAspectFill options:imageRequestOptions resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
NSLog(#"You get an image from result");
}];
}];