我刚刚将Facebook iOS SDK集成到我的应用程序中，登录功能运行良好。然而，SDK似乎没有提供自定义登录按钮的选项（它为我提供了那个丑陋的默认按钮位于屏幕中央）。我正在使用我的应用程序故事板 - 我该如何将我的自己的按钮与他们提供的代码连接起来？我看到一些早期的答案发布在Stack上，但FB文档已经改变了 :/
Viewcontroller.m
FBSDKLoginButton *loginButton = [[FBSDKLoginButton alloc] init];
loginButton.center = self.view.center;
[self.view addSubview:loginButton];
在故事板中制作自定义按钮。将操作连接到myButtonPressed。
- (void)viewDidLoad {
[super viewDidLoad];
self.loginButton = [[FBSDKLoginButton alloc] init];
self.loginButton.hidden = YES;
}
- (void)myButtonPressed {
[self.loginButton sendActionsForControlEvents: UIControlEventTouchUpInside];
}
已更新至 Swift 3 版本
@IBAction func fblogin(_ sender: Any) {
let loginManager = LoginManager()
UIApplication.shared.statusBarStyle = .default // remove this line if not required
loginManager.logIn([ .publicProfile,.email ], viewController: self) { loginResult in
print(loginResult)
//use picture.type(large) for large size profile picture
let request = GraphRequest(graphPath: "me", parameters: ["fields":"email,name,gender,picture"], accessToken: AccessToken.current, httpMethod: .GET, apiVersion: FacebookCore.GraphAPIVersion.defaultVersion)
request.start { (response, result) in
switch result {
case .success(let value):
print(value.dictionaryValue)
case .failed(let error):
print(error)
}
}
}
}
对于Objective-C
您可以在UIButton的点击事件中调用此方法。
-(void)fblogin{
FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
if ([UIApplication.sharedApplication canOpenURL:[NSURL URLWithString:@"fb://"]])
{
login.loginBehavior = FBSDKLoginBehaviorSystemAccount;
}
[login logInWithReadPermissions:@[@"public_profile", @"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
if (error)
{
NSLog(@"Unexpected login error: %@", error);
NSString *alertMessage = error.userInfo[FBSDKErrorLocalizedDescriptionKey] ?: @"There was a problem logging in. Please try again later.";
NSString *alertTitle = error.userInfo[FBSDKErrorLocalizedTitleKey] ?: @"Oops";
[[[UIAlertView alloc] initWithTitle:alertTitle
message:alertMessage
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil] show];
}
else
{
if(result.token) // This means if There is current access token.
{
[[[FBSDKGraphRequest alloc] initWithGraphPath:@"me"
parameters:@{@"fields": @"picture, name, email"}]
startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id userinfo, NSError *error) {
if (!error) {
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
dispatch_async(queue, ^(void) {
dispatch_async(dispatch_get_main_queue(), ^{
// you are authorised and can access user data from user info object
});
});
}
else{
NSLog(@"%@", [error localizedDescription]);
}
}];
}
NSLog(@"Login Cancel");
}
}];
}
关于自定义按钮的新文档URL：
https://developers.facebook.com/docs/facebook-login/ios/advanced
或者如果您只想知道在认证按钮被点击时该做什么，请在“按钮点击”方法中执行以下操作（不要忘记将该方法与您的按钮链接）：
#import <FBSDKLoginKit/FBSDKLoginKit.h>
#import <FBSDKCoreKit/FBSDKCoreKit.h>
那么
- (IBAction)facebookAuthButtonTapped:(id)sender {
FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
[login
logInWithReadPermissions: @[@"public_profile"]
fromViewController:self
handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
if (error) {
NSLog(@"Process error");
} else if (result.isCancelled) {
NSLog(@"Cancelled");
} else {
NSLog(@"Logged in");
}
}];
}
SwiftUI解决方案
import SwiftUI
import FBSDKLoginKit
import Firebase
struct FaceBookLoginButton: UIViewRepresentable {
func makeCoordinator() -> FBSignInCoordinator {
return FBSignInCoordinator()
}
func makeUIView(context: UIViewRepresentableContext<FaceBookLoginButton>) -> FBLoginButton {
let view = FBLoginButton()
view.permissions = ["email"]
view.delegate = context.coordinator
// normal
view.setTitleColor(.clear, for: .normal)
view.setImage(nil, for: .normal)
view.setBackgroundImage(nil, for: .normal)
// tapped
view.setTitleColor(.clear, for: .highlighted)
view.setImage(nil, for: .highlighted)
view.setBackgroundImage(nil, for: .highlighted)
return view
}
func updateUIView(_ uiView: FBLoginButton, context: UIViewRepresentableContext<FaceBookLoginButton>) {}
}
import FacebookCore
import FacebookLogin
func viewDidLoad() {
// Add a custom login button to your app
let myLoginButton = UIButton(type: .Custom)]
myLoginButton.backgroundColor = UIColor.darkGrayColor()
myLoginButton.frame = CGRect(0, 0, 180, 40);
myLoginButton.center = view.center;
myLoginTitle.setTitle("My Login Button" forState: .Normal)
// Handle clicks on the button
myLoginButton.addTarget(self, action: @selector(self.loginButtonClicked) forControlEvents: .TouchUpInside)
// Add the button to the view
view.addSubview(myLoginButton)
}
// Once the button is clicked, show the login dialog
@objc func loginButtonClicked() {
let loginManager = LoginManager()
loginManager.logIn([ .PublicProfile ], viewController: self) { loginResult in
switch loginResult {
case .Failed(let error):
print(error)
case .Cancelled:
print("User cancelled login.")
case .Success(let grantedPermissions, let declinedPermissions, let accessToken):
print("Logged in!")
}
}
Swift 4.0 设置按钮的操作。
func loginButtonClicked() {
let loginManager = LoginManager()
loginManager.logIn(readPermissions: [.publicProfile], viewController: self) { (loginResult) in
switch loginResult {
case .failed(let error):
print(error)
case .cancelled:
print("User cancelled login.")
case .success(let grantedPermissions, let declinedPermissions, let accessToken):
print("Logged in! \(grantedPermissions) \(declinedPermissions) \(accessToken)")
self.getFBUserData()
}
}
}
Swift 5.0 设置按钮的动作
let loginManager = LoginManager()
loginManager.logIn(permissions: [.publicProfile], viewController: self) { (loginResult) in
switch loginResult {
case .failed(let error):
print(error)
case .cancelled:
print("User cancelled login.")
case .success(let grantedPermissions, let declinedPermissions, let accessToken):
print("Logged in! \(grantedPermissions) \(declinedPermissions) \(accessToken)")
// self.getFBUserData()
}
}
这对我来说很有效的 Swift
import FacebookLogin
import FBSDKCoreKit
func connectFacebook() {
let loginManager = LoginManager()
loginManager.logIn(permissions: ["user_hometown"],
from: nil) { (result, error) in
if let result = result {
print("Token: \(result.token?.tokenString ?? "")")
}
}
}