LAContext更改UIAlertController按钮标题

Question

我将TouchID与LAContext合并到我的应用程序中，如下所示：

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但是，我希望将按钮标题的名称从“输入密码”更改为“输入安全代码”(或类似的内容)，如下所示：

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我该怎么改变那个按钮的标题呢？

这是LAContext 文档，这是我的代码：

var touchIDContext = LAContext()

if touchIDContext.canEvaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, error: &msgError) {
   touchIDContext.evaluatePolicy(.DeviceOwnerAuthenticationWithBiometrics, localizedReason: touchIDMessage) {
        (success: Bool, error: NSError!) -> Void in

        if success {
            println("Success")
        } else {
            println("Error: \(error)")
        }
    }
}

Answer 1

设置localizedFallbackTitle属性：

目标-C：

LAContext *context = [[LAContext alloc] init];
context.localizedFallbackTitle = @"YOUR TEXT HERE";

斯威夫特

var touchIDContext = LAContext()
context.localizedFallbackTitle = "YOUR TEXT HERE"

Answer 2

从苹果文档中，localizedCancelTitle可用于iOS 10

// Fallback button title.
// @discussion 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.
@property (nonatomic, nullable, copy) NSString *localizedFallbackTitle;

// Cancel button title.
// @discussion Allows cancel button title customization. A default title "Cancel" is used when
//             this property is left nil or is set to empty string.
@property (nonatomic, nullable, copy) NSString *localizedCancelTitle NS_AVAILABLE(10_12, 10_0);