我刚刚发布了一个允许最终保存 PFFile 的类。
你可以在这里找到它：
/*
This example uses an UIImage, but this works with any file writable as NSData
We begin by writing this image in our tmp directory with an uuid as name.
*/
UIImage *nyancat = [UIImage imageNamed:@"nyancat.jpg"];
NSData *imageData = UIImageJPEGRepresentation(nyancat, 0.5);
NSString *filename = [[NSUUID UUID] UUIDString];
NSURL *fileUrl = [PFFileEventuallySaver fileURLInTmpWithName:filename];
[imageData writeToURL:fileUrl atomically:YES];
/*
We create a PFObject (you can pass an array to below function if you need your file to be saved on several objects). If upload works on first time, do what you want with your file, like linking it on your PFobject.
If saving fails, it'll be retried as soon as network is available, on this session or nexts launches of app.
In that case, the pointer at key kPFFILE_MANAGER_OBJECT_FILE_KEY of your PFFObject will be set with the PFFile, then saved eventually within PFFileEventuallySaver
*/
PFObject *object = [PFObject objectWithClassName:kPFFILE_CONTAINER_OBJECT_CLASSNAME];
[[PFFileEventuallySaver getInstance] trySaveobjectAtURL:fileUrl associatedObjects:@[object] withBlock:^(PFFile *file, NSError *error) {
if(!error)
{
NSLog(@"[First try, network is fine] File saved, saving PFObject");
object[kPFFILE_MANAGER_OBJECT_FILE_KEY] = file;
[object saveEventually];
NSLog(@"Try again disabling your network connection");
}
else
{
NSLog(@"No network, connect back your wifi, or relaunch app. Your file will be sent");
}
} progressBlock:^(int percentDone) {
NSLog(@"[First try, network is fine] Sending file %d/100%%", percentDone);
}];