我目前在App上工作,我需要更改Facebook SDK提供的Facebook按钮的默认设计。 我成功地让提供的按钮透明并将其粘贴在设计视图上方,并且效果很好(现在设计匹配并且Facebook SDK按钮的功能运行良好)。 在我这样做之后我的问题出现了,因为按钮失去了它的Ui效果(点击时没有突出显示)。 如果有人可以帮助我,我需要为这个设计按钮添加突出效果。 让我们澄清一下: 我将UIView设计为按钮,我在其上方放置了一个透明的Facebook SDK按钮,结果是我的设计形状和Facebook按钮的功能同时失去了:点击时没有突出显示效果。 / p>
答案 0 :(得分:10)
我尝试了以下代码,它以正确的方式提供了功能。但是,在点击它时,我没有给按钮突出显示效果。 这是代码:
{
if (FBSDKAccessToken.currentAccessToken() != nil)
{
// if user logged in then handleTap func will run instead of button functionality
let tap = UITapGestureRecognizer(target: self, action: "handleTap:")
self.btnSignUpwithFaceBook.addGestureRecognizer(tap)
}
else
{
let loginView : FBSDKLoginButton = FBSDKLoginButton()
self.view.addSubview(loginView)
loginView.center = self.btnSignUpwithFaceBook.center
loginView.frame.size.width = self.btnSignUpwithFaceBook.frame.width
loginView.frame.size.height = self.btnSignUpwithFaceBook.frame.height
loginView.frame.origin.x = self.btnSignUpwithFaceBook.frame.origin.x
loginView.frame.origin.y = self.btnSignUpwithFaceBook.frame.origin.y
for subView in loginView.subviews
{
subView.removeFromSuperview()
}
loginView.layer.shadowColor = UIColor.clearColor().CGColor
loginView.setBackgroundImage(nil, forState: UIControlState.Normal)
loginView.setBackgroundImage(nil, forState: UIControlState.Application)
loginView.setBackgroundImage(nil, forState: UIControlState.allZeros)
loginView.setBackgroundImage(nil, forState: UIControlState.Highlighted)
loginView.setBackgroundImage(nil, forState: UIControlState.Reserved)
loginView.setBackgroundImage(nil, forState: UIControlState.Selected)
loginView.setImage(nil, forState: UIControlState.Normal)
loginView.setImage(nil, forState: UIControlState.Application)
loginView.setImage(nil, forState: UIControlState.allZeros)
loginView.setImage(nil, forState: UIControlState.Highlighted)
loginView.setImage(nil, forState: UIControlState.Reserved)
loginView.setImage(nil, forState: UIControlState.Selected)
loginView.backgroundColor = UIColor.clearColor()
// just for test
self.btnSignUpwithFaceBook.layer.borderWidth = 1
self.btnSignUpwithFaceBook.layer.borderColor = UIColor.whiteColor().CGColor
loginView.layer.backgroundColor = UIColor.clearColor().CGColor
loginView.readPermissions = ["public_profile", "email", "user_friends"]
loginView.delegate = self
loginView.setTranslatesAutoresizingMaskIntoConstraints(false)
var constX = NSLayoutConstraint(item: loginView, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: self.btnSignUpwithFaceBook, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0)
view.addConstraint(constX)
var constY = NSLayoutConstraint(item: loginView, attribute: NSLayoutAttribute.CenterY, relatedBy: NSLayoutRelation.Equal, toItem: self.btnSignUpwithFaceBook, attribute: NSLayoutAttribute.CenterY, multiplier: 1, constant: 0)
view.addConstraint(constY)
let views = ["loginView": loginView]
var constH = NSLayoutConstraint.constraintsWithVisualFormat("H:[loginView(57)]", options: NSLayoutFormatOptions(0), metrics: nil, views: views)
view.addConstraints(constH)
var constW = NSLayoutConstraint.constraintsWithVisualFormat("V:[loginView(281)]", options: NSLayoutFormatOptions(0), metrics: nil, views: views)
view.addConstraints(constW)
}
实际上主要问题是facebookLogInButton是FBSDK的自定义类,而swift并不认为它是uiButton,这就是为什么没有突出显示属性出现的原因。 因此,我的目标是帮助你找到它的方法是找到一种方法,让facebookLoginButton在swift中被视为uiButton。
答案 1 :(得分:7)
您可以使用默认的UIButton,并使用FBSDKManager而不是使用Facebook SDK / FBSDKLoginButton登录。您可以在UIButton上设置突出显示的状态颜色等。
从自定义FB按钮的IBAction调用方法fbLoginInitiate
。
func fbLoginInitiate() {
let loginManager = FBSDKLoginManager()
loginManager.logInWithReadPermissions(["public_profile", "email"], handler: {(result:FBSDKLoginManagerLoginResult!, error:NSError!) -> Void in
if (error != nil) {
// Process error
self.removeFbData()
} else if result.isCancelled {
// User Cancellation
self.removeFbData()
} else {
//Success
if result.grantedPermissions.contains("email") && result.grantedPermissions.contains("public_profile") {
//Do work
self.fetchFacebookProfile()
} else {
//Handle error
}
}
})
}
func removeFbData() {
//Remove FB Data
let fbManager = FBSDKLoginManager()
fbManager.logOut()
FBSDKAccessToken.setCurrentAccessToken(nil)
}
func fetchFacebookProfile()
{
if FBSDKAccessToken.currentAccessToken() != nil {
let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: nil)
graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in
if ((error) != nil) {
//Handle error
} else {
//Handle Profile Photo URL String
let userId = result["id"] as! String
let profilePictureUrl = "https://graph.facebook.com/\(id)/picture?type=large"
let accessToken = FBSDKAccessToken.currentAccessToken().tokenString
let fbUser = ["accessToken": accessToken, "user": result]
}
})
}
}