NSURLRequest NSURLRequestReturnCacheDataDontLoad example ios

enum
{
   NSURLRequestUseProtocolCachePolicy = 0,
   NSURLRequestReloadIgnoringLocalCacheData = 1,
   NSURLRequestReloadIgnoringLocalAndRemoteCacheData =4,
   NSURLRequestReloadIgnoringCacheData = NSURLRequestReloadIgnoringLocalCacheData,
   NSURLRequestReturnCacheDataElseLoad = 2,
   NSURLRequestReturnCacheDataDontLoad = 3,
   NSURLRequestReloadRevalidatingCacheData = 5
};
typedef NSUInteger NSURLRequestCachePolicy;

NSURLRequestReturnCacheDataDontLoad

Specifies that the existing cache data should be used to satisfy a request, regardless of its age or expiration date. If there is no existing data in the cache corresponding to a URL load request, no attempt is made to load the data from the originating source, and the load is considered to have failed. This constant specifies a behavior that is similar to an “offline” mode.

Example of [NSURLRequest NSURLRequestReturnCacheDataDontLoad]

NSString *urlString = [NSString stringWithFormat:@"http://test.localhost/api/request.php?url=%@", passedValue]; 
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy: NSURLRequestReturnCacheDataDontLoad timeoutInterval:15.0];

Example of [NSURLRequest NSURLRequestReturnCacheDataDontLoad]

NSURLRequest *lRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:link] cachePolicy:NSURLRequestReturnCacheDataDontLoad timeoutInterval:20.0];