最近学习swift3.0， 不忙的时候开始用 Swift 重写现有的项目，有些地方的写法变得让人不知道怎么写了，今天就分享一下我在重写 指纹解锁工具类的时候遇到的一些问题吧。
先展示一下成果
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
TouchIdManager.touchIdWithHand(fallBackTitle: "", succeed: {
print("解锁成功")
}) { (error) in
print(error.localizedDescription)
}
print(TouchIdManager.IsSupportTouchID)
}
}
import LocalAuthentication
class TouchIdManager {
/// 指纹解锁
///
/// - Parameters:
/// - fallBackTitle: Allows fallback button title customization. A default title "Enter Password" is used when
/// this property is left nil. If set to empty string, the button will be hidden
/// - succeed: 解锁成功的回调
/// - failed: 解锁失败的回调
class func touchIdWithHand(fallBackTitle: String?, succeed: @escaping () -> (), failed: @escaping (_ error: LAError) -> ()) {
guard self.IsSupportTouchID else {
print("设备不支持TouchID 或未开启TouchID ")
return
}
let context = LAContext()
context.localizedFallbackTitle = fallBackTitle
let reason = "验证指纹，完成支付"
context.evaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason, reply: { (isSuccess, err) in
OperationQueue.main.addOperation({
guard isSuccess == true, err == nil else {
let laerror = err as! LAError
failed(laerror)
// switch laerror.code {
// case LAError.authenticationFailed:
// print("连续三次输入错误，身份验证失败。")
// case LAError.userCancel:
// print("用户点击取消按钮。")
// case LAError.userFallback:
// print("用户点击输入密码。")
// case LAError.systemCancel:
// print("系统取消")
// case LAError.passcodeNotSet:
// print("用户未设置密码")
// case LAError.touchIDNotAvailable:
// print("touchID不可用")
// case LAError.touchIDNotEnrolled:
// print("touchID未设置指纹")
// default: break
// }
return
}
succeed()
})
})
}
/// 检查手机 TouchID 功能是否开启或可以使用
class var IsSupportTouchID: Bool {
get {
let context = LAContext()
var error :NSError?
let isSupport = context.canEvaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, error: &error)
return isSupport
}
}
}
