Upload photo to facebook with iPhone app
头文件中加入
UIActionSheetDelegate, FBRequestDelegate, FBDialogDelegate
三个协议
成员变量中加入
FBSession *mFBSession;
void *mRawData;
UIImage *mSubmitImage;
BOOL mIsCheckLogin;
@property (nonatomic, retain) UIImage *submitImage;
- (void)uploadPhoto;
- (void)checkLogin;
- (void)showStreamDialog:(NSString *)src link:(NSString *)imageURL;
- (void)beginWaiting;
- (void)endWaiting;
@synthesize submitImage = mSubmitImage;
添加一个Action Sheet
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Do you want to ..."
delegate:self
cancelButtonTitle:@"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:@"Submit to facebook", @"Save to Album", nil];
[actionSheet showInView:self.view];
[actionSheet release];
#pragma mark -
#pragma mark ActionSheet Delegate Methods
- (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {
if (buttonIndex == [actionSheet cancelButtonIndex]) {
//cancel
} else if (buttonIndex == [actionSheet firstOtherButtonIndex]) {
//submit to facebook
// pause the simulation
RootViewController* rootViewController = (RootViewController*)[self topViewController];
rootViewController.simulationPaused = true;
// if color picker is open, close it
[self dismissColorPicker];
// TODO: localize this!
FluidModel* model = [FluidModel getInstance];
self.submitImage = [model createImage:&mRawData];
if (!self.submitImage) {
// open an alert with just an OK button
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Save image"
message:@"Not enough memory to create image."
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
} else {
[self checkLogin];
}
} else {
//save to album
[self beginWaiting];
...
}
}
如果submit to facebook，则先检查login
- (void)checkLogin {
FBSession* fbSession = [FBSession session];
if (fbSession.isConnected == NO) {
FBLoginDialog* dialog = [[[FBLoginDialog alloc] initWithSession:fbSession] autorelease];
dialog.delegate = self;
[dialog show];
mIsCheckLogin = YES;
} else {
[self uploadPhoto];
}
}
login需要实现FBDialogDelegate，由于之后有其它程序也用到该协议，因此该协议之后再实现
login后开始uploadphoto
- (void)uploadPhoto {
[self beginWaiting];
NSDictionary *params = nil;
[[FBRequest requestWithDelegate:self] call:@"facebook.photos.upload"
params:params
dataParam:(NSData*)self.submitImage];
}
uploadphoto需要实现FBRequestDelegate
#pragma mark -
#pragma mark FBRequestDelegate
- (void)request:(FBRequest*)request didLoad:(id)result {
if ([request.method isEqualToString:@"facebook.photos.upload"]) {
[self endWaiting];
free(mRawData);
NSDictionary *photoInfo = result;
NSString *src = [photoInfo objectForKey:@"src"];
NSString *imageURL = [photoInfo objectForKey:@"link"];
[self showStreamDialog:src link:imageURL];
}
}
- (void)request:(FBRequest*)request didFailWithError:(NSError*)error {
[self endWaiting];
NSLog(@"%@", [NSString stringWithFormat:@"Error(%d) %@", error.code, error.localizedDescription]);
free(mRawData);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Upload failed"
message:@"Please try again"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
}
request成功后打开新的Dialog，询问用户是否要将photo展示到wall
- (void)showStreamDialog:(NSString *)src link:(NSString *)imageURL {
FBStreamDialog* dialog = [[[FBStreamDialog alloc] init] autorelease];
dialog.delegate = self;
dialog.userMessagePrompt = @"show to your friends";
NSString* attachment = [NSString stringWithFormat:@"{\"name\":\"Flow Painter\",\"href\":\"%@\",\"caption\":\"I make my picture in Flow Painter. Come and take a look!\",\"description\":\"Download this app, paint your own picture!\",\"media\":[{\"type\":\"image\",\"src\":\"%@\",\"href\":\"%@\"}],\"properties\":{\"an iPhone App Made by\":{\"text\":\"Coconut Island Studio\",\"href\":\"%@\"}}}", appURL, src, imageURL, homepage];
dialog.attachment = attachment;
// replace this with a friend's UID
// dialog.targetId = @"999999";
[dialog show];
}
然后实现FBDialogDelegate
#pragma mark -
#pragma mark FBDialogDelegate
- (void)dialog:(FBDialog*)dialog didFailWithError:(NSError*)error {
NSLog(@"%@", [NSString stringWithFormat:@"Error(%d) %@", error.code, error.localizedDescription]);
if (mIsCheckLogin) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Connect failed"
message:@"Can not connect to facebook"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
free(mRawData);
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Upload success"
message:@"Photo has uploaded into your album.You may publish the photo to your wall manually"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
}
}
- (BOOL)dialog:(FBDialog*)dialog shouldOpenURLInExternalBrowser:(NSURL*)url {
return YES;
}
- (void)dialogDidSucceed:(FBDialog*)dialog {
if (mIsCheckLogin) {
[self uploadPhoto];
mIsCheckLogin = NO;
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Upload success"
message:@"Your friends will find the photo on his wall"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
}
}
-(void)dialogDidCancel:(FBDialog*)dialog {
if (mIsCheckLogin) {
free(mRawData);
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Upload success"
message:@"Photo has uploaded into your album.You may publish the photo to your wall manually"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
}
}
最后解决在系统等待时的图标及屏蔽按键
- (void)beginWaiting {
// show the waiting symbol
progressView = [[UIActivityIndicatorView alloc]
initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[progressView setCenter:CGPointMake(160.0f, 240.0f)];
[progressView startAnimating];
[self.topViewController.view addSubview:progressView];
self.view.window.userInteractionEnabled = NO;
}
(通过self.view.window可以直接取得当前application的window,这样就可以直接屏蔽整个window而不用一个个地去屏蔽按键了)
- (void)endWaiting {
// dismiss the waiting symbol
[progressView removeFromSuperview];
[progressView stopAnimating];
[progressView release];
self.view.window.userInteractionEnabled = YES;
}