更新时间:2023-02-02 21:01:19
最简单的方法是将其保存在应用程序的Documents目录中并使用NSUserDefaults保存路径,如下所示:
The simplest way is to save it in the app's Documents directory and save the path with NSUserDefaults like so:
NSData *imageData = UIImagePNGRepresentation(newImage);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *imagePath =[documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png",@"cached"]];
NSLog(@"pre writing to file");
if (![imageData writeToFile:imagePath atomically:NO])
{
NSLog(@"Failed to cache image data to disk");
}
else
{
NSLog(@"the cachedImagedPath is %@",imagePath);
}
然后将imagePath保存在NSUserDefaults的某些字典中,或者你想要的,然后检索它只需:
Then save the imagePath in some dictionary in NSUserDefaults or however you'd like, and then to retrieve it just do:
NSString *theImagePath = [yourDictionary objectForKey:@"cachedImagePath"];
UIImage *customImage = [UIImage imageWithContentsOfFile:theImagePath];