try this code:
save image in this path:
NSFileManager *fileMan = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *str= [NSString stringWithFormat:@"%@.png",patientlastName];
NSString *Image_filePath=[documentsDirectory stringByAppendingPathComponent:str];
NSData *imagedata=UIImagePNGRepresentation(yourimage);
[fileMan createFileAtPath:[Image_filePath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding] contents:imagedata attributes:nil];
get image path:
NSString* fileName = [NSString stringWithFormat:@"%@.png",patientlastName}
NSArray *arrayPaths =
NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory,
NSUserDomainMask,
YES);
NSString *path = [arrayPaths objectAtIndex:0];
NSString* pdfFileName = [path stringByAppendingPathComponent:fileName];
UIImage *image1=[UIImage imageWithContentsOfFile:pdfFileName];
imageView.image=image1;