我设置了 touchID 并在我的应用程序中正常工作。
但是我想更改“输入密码”的功能。
创建身份验证时，我遵循以下教程： http: //www.appcoda.com/touch-id-api-ios8/
但是，他们为“输入密码”选项使用了 alertView。
我想关闭 touchID alertview 并使我的 passwordTextField 成为 firstResponder。
我自然尝试过：
self.passwordTextField.becomeFirstResponder()
但这会导致错误：
2015-04-09 10:48:42.309 Formula Stocks[3933:964941] *** Assertion failure in void _UIPerformResizeOfTextViewForTextContainer(NSLayoutManager *, UIView<NSTextContainerView> *, NSTextContainer *, NSUInteger)(), /SourceCache/UIFoundation/UIFoundation-371.13/UIFoundation/TextSystem/NSLayoutManager_Private.m:1547
2015-04-09 10:48:42.312 Formula Stocks[3933:964941] <NSXPCConnection: 0x1701061e0> connection to service named com.apple.CoreAuthentication.daemon: Warning: Exception caught during decoding of received reply to message 'evaluatePolicy:options:reply:', dropping incoming message and calling failure block.
Exception: Only run on the main thread!
这是我的身份验证功能：
func requestFingerprintAuthentication() {
// Get the local authentication context.
let context = LAContext()
// Declare a NSError variable.
var error: NSError?
// Set the reason string that will appear on the authentication alert.
var reasonString = "Sign In."
// Check if the device can evaluate the policy.
if context.canEvaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, error: &error) {
[context .evaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, localizedReason: reasonString, reply: { (success: Bool, evalPolicyError: NSError?) -> Void in
if success {
NSOperationQueue.mainQueue().addOperationWithBlock({ () -> Void in
println("successfull signin with touchID")
self.emailTextField.text = emailID as! String
self.passwordTextField.text = passwordID as! String
self.signIn(self.signInButton)
})
}
else{
// If authentication failed then show a message to the console with a short description.
// In case that the error is a user fallback, then show the password alert view.
println(evalPolicyError?.localizedDescription)
switch evalPolicyError!.code {
case LAError.SystemCancel.rawValue:
println("Authentication was cancelled by the system")
case LAError.UserCancel.rawValue:
println("Authentication was cancelled by the user")
case LAError.UserFallback.rawValue:
println("User selected to enter custom password")
self.passwordTextField.becomeFirstResponder()
default:
println("Authentication failed")
self.passwordTextField.becomeFirstResponder()
}
}
})]
}
else{
// If the security policy cannot be evaluated then show a short message depending on the error.
switch error!.code{
case LAError.TouchIDNotEnrolled.rawValue:
println("TouchID is not enrolled")
case LAError.PasscodeNotSet.rawValue:
println("A passcode has not been set")
default:
// The LAError.TouchIDNotAvailable case.
println("TouchID not available")
}
// Optionally the error description can be displayed on the console.
println(error?.localizedDescription)
// Show the custom alert view to allow users to enter the password.
//self.showPasswordAlert()
self.passwordTextField.becomeFirstResponder()
}
}
它确实打印出来
Optional("Fallback authentication mechanism selected.")
User selected to enter custom password
所以我知道它调用了正确的 .case
任何帮助它选择我UITextField将不胜感激！