我已经创建了一个应用程序并成功完成了我只想在 Fcebook 中分享，我通过参考一些教程进行了尝试。这是我在 viewcontroller.m 文件中的代码。
//
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize btnLogin;
@synthesize btnPublish;
@synthesize lblUser;
@synthesize actView;
@synthesize facebook;
@synthesize permissions;
@synthesize isConnected;
-(void)checkForPreviouslySavedAccessTokenInfo
{
// Initially set the isConnected value to NO.
isConnected = NO;
// Check if there is a previous access token key in the user defaults file.
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"FBAccessTokenKey"] &&
[defaults objectForKey:@"FBExpirationDateKey"]) {
facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
// Check if the facebook session is valid.
// If it’s not valid clear any authorization and mark the status as not connected.
if (![facebook isSessionValid]) {
[facebook authorize:nil];
isConnected = NO;
}
else {
isConnected = YES;
}
}
}
-(void)setLoginButtonImage{
UIImage *imgNormal;
UIImage *imgHighlighted;
UIImageView *tempImage;
// Check if the user is connected or not.
if (!isConnected) {
// In case the user is not connected (logged in) show the appropriate
// images for both normal and highlighted states.
imgNormal = [UIImage imageNamed:@"LoginNormal.png"];
imgHighlighted = [UIImage imageNamed:@"LoginPressed.png"];
}
else {
imgNormal = [UIImage imageNamed:@"LogoutNormal.png"];
imgHighlighted = [UIImage imageNamed:@"LogoutPressed.png"];
}
// Get the screen width to use it to center the login/logout button.
// We’ll use a temporary image view to get the appopriate width and height.
float screenWidth = [UIScreen mainScreen].bounds.size.width;
tempImage = [[UIImageView alloc] initWithImage:imgNormal];
[btnLogin setFrame:CGRectMake(screenWidth / 2 - tempImage.frame.size.width / 2, btnLogin.frame.origin.y, tempImage.frame.size.width, tempImage.frame.size.height)];
// Set the button’s images.
[btnLogin setBackgroundImage:imgNormal forState:UIControlStateNormal];
[btnLogin setBackgroundImage:imgHighlighted forState:UIControlStateHighlighted];
// Release the temporary image view.
[tempImage release];
}
-(void)showActivityView{
// Show an alert with a message without the buttons.
UIAlertView *msgAlert = [[UIAlertView alloc] initWithTitle:@"My test app" message:@"Please wait..." delegate:self cancelButtonTitle:nil otherButtonTitles:nil];
[msgAlert show];
// Show the activity view indicator.
actView = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0.0, 0.0, 40.0, 40.0)];
[actView setCenter:CGPointMake(160.0, 350.0)];
[actView setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleGray];
[self.view addSubview:actView];
[actView startAnimating];
}
-(void)stopShowingActivity{
[actView stopAnimating];
UIAlertView *msgAlert = nil;
[UIAlertView:msgAlert dismissWithClickedButtonIndex:0 animated:YES];
}
-(void)saveAccessTokenKeyInfo{
// Save the access token key info into the user defaults.
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:[facebook accessToken] forKey:@"FBAccessTokenKey"];
[defaults setObject:[facebook expirationDate] forKey:@"FBExpirationDateKey"];
[defaults synchronize];
}
-(void)request:(FBRequest *)request didReceiveResponse:(NSURLResponse *)response {
// Keep this just for testing purposes.
NSLog(@"received response");
}
-(void)request:(FBRequest *)request didLoad:(id)result{
// With this method we’ll get any Facebook response in the form of an array.
// In this example the method will be used twice. Once to get the user’s name to
// when showing the welcome message and next to get the ID of the published post.
// Inside the result array there the data is stored as a NSDictionary.
if ([result isKindOfClass:[NSArray class]]) {
// The first object in the result is the data dictionary.
result = [result objectAtIndex:0];
}
// Check it the “first_name” is contained into the returned data.
if ([result objectForKey:@"first_name"]) {
// If the current result contains the "first_name" key then it's the user's data that have been returned.
// Change the lblUser label's text.
[lblUser setText:[NSString stringWithFormat:@"Welcome %@!", [result objectForKey:@"first_name"]]];
// Show the publish button.
[btnPublish setHidden:NO];
}
else if ([result objectForKey:@"id"]) {
// Stop showing the activity view.
[self stopShowingActivity];
// If the result contains the "id" key then the data have been posted and the id of the published post have been returned.
UIAlertView *al = [[UIAlertView alloc] initWithTitle:@"My test app" message:@"Your message has been posted on your wall!" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
[al show];
[al release];
}
}
-(void)request:(FBRequest *)request didFailWithError:(NSError *)error{
NSLog(@"%@", [error localizedDescription]);
// Stop the activity just in case there is a failure and the activity view is animating.
if ([actView isAnimating]) {
[self stopShowingActivity];
}
}
-(void)fbDidLogin{
// Save the access token key info.
[self saveAccessTokenKeyInfo];
// Get the user's info.
[facebook requestWithGraphPath:@"me" andDelegate:self];
}
-(void)fbDidNotLogin:(BOOL)cancelled{
// Keep this for testing purposes.
//NSLog(@"Did not login");
UIAlertView *al = [[UIAlertView alloc] initWithTitle:@"My test app" message:@"Login cancelled." delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
[al show];
}
-(void)fbDidLogout{
// Keep this for testing purposes.
//NSLog(@"Logged out");
// Hide the publish button.
[btnPublish setHidden:YES];
}
- (IBAction)LoginOrLogout {
// If the user is not connected (logged in) then connect.
// Otherwise logout.
if (!isConnected) {
[facebook authorize:permissions];
// Change the lblUser label's message.
[lblUser setText:@"Please wait..."];
}
else {
[facebook logout:self];
[lblUser setText:@"Tap on the Login to connect to Facebook"];
}
isConnected = !isConnected;
[self setLoginButtonImage];
}
- (IBAction)Publish {
// Show the activity indicator.
[self showActivityView];
// Create the parameters dictionary that will keep the data that will be posted.
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
@"My test app", @"name",
@"http://www.google.com", @"link",
@"FBTestApp app for iPhone!", @"caption",
@"This is a description of my app", @"description",
@"Hello!\n\nThis is a test message\nfrom my test iPhone app!", @"message",
nil];
// Publish.
// This is the most important method that you call. It does the actual job, the message posting.
[facebook requestWithGraphPath:@"me/feed" andParams:params andHttpMethod:@"POST" andDelegate:self];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// Set the permissions.
// Without specifying permissions the access to Facebook is imposibble.
permissions = [[NSArray arrayWithObjects:@"read_stream", @"publish_stream", nil] retain];
// Set the Facebook object we declared. We’ll use the declared object from the application
// delegate.
facebook = [[Facebook alloc] initWithAppId:@"236058923xxxxxx" andDelegate:self];
// Check if there is a stored access token.
[self checkForPreviouslySavedAccessTokenInfo];
// Depending on the access token existence set the appropriate image to the login button.
[self setLoginButtonImage];
// Specify the lblUser label's message depending on the isConnected value.
// If the access token not found and the user is not connected then prompt him/her to login.
if (!isConnected) {
[lblUser setText:@"Tap on the Login to connect to Facebook"];
}
else {
// Get the user's name from the Facebook account. The message will be set later.
[facebook requestWithGraphPath:@"me" andDelegate:self];
}
// Initially hide the publish button.
[btnPublish setHidden:YES];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (void)dealloc {
[btnLogin release];
[lblUser release];
[btnPublish release];
[actView release];
[facebook release];
[permissions release];
[super dealloc];
}
@end
viewcontroller.h 文件中的代码是
#import <UIKit/UIKit.h>
#import "FBConnect.h"
#import "Facebook.h"
@interface ViewController : UIViewController <FBSessionDelegate, FBRequestDelegate, FBDialogDelegate>{
UIButton *btnLogin;
UIButton *btnPublish;
UILabel *lblUser;
UIActivityIndicatorView *actView;
Facebook *facebook;
NSArray *permissions;
BOOL isConnected;
}
@property (retain, nonatomic) IBOutlet UIButton *btnLogin;
@property (retain, nonatomic) IBOutlet UIButton *btnPublish;
@property (retain, nonatomic) IBOutlet UILabel *lblUser;
@property (retain, nonatomic) UIActivityIndicatorView *actView;
@property (retain, nonatomic) Facebook *facebook;
@property (retain, nonatomic) NSArray *permissions;
@property (nonatomic) BOOL isConnected;
- (IBAction)登录或注销；
(IBAction)发布；
@结尾
谁能说我收到这些错误。
