Swift - 从peoplePickerNavigationController访问名称

Question

我试图使用peoplePicker访问姓名，电话等数据，我有以下功能：

func peoplePickerNavigationController(peoplePicker: ABPeoplePickerNavigationController, didSelectPerson person: ABRecordRef) {
    let phone: ABMultiValueRef? = ABRecordCopyValue(person, kABPersonPhoneProperty)?.takeRetainedValue()
    let name: ABMultiValueRef? = ABRecordCopyValue(person, kABPersonFirstNameProperty)?.takeRetainedValue()

    if (ABMultiValueGetCount(name) > 0) {
        let indexName = 0 as CFIndex
        let name = ABMultiValueCopyValueAtIndex(name, indexName).takeRetainedValue() as! String

        print("name of selected contact = \(name)")
    } else {
        print("No name")
    }

    if (ABMultiValueGetCount(phone) > 0) {
        let indexPhone = 0 as CFIndex
        let phone = ABMultiValueCopyValueAtIndex(phone, indexPhone).takeRetainedValue() as! String

        print("phone for selected contact = \(phone)")
    } else {
        print("No phone")
    }
}

它适用于手机，但它给我一个联系人姓名为Thread 1: EXC_BAD_ACCESS (code=EXC_I386_GPFLT)的错误，为什么？

编辑：屏幕截图

SOLUTION：

let name = ABRecordCopyValue(person, kABPersonFirstNameProperty)?.takeRetainedValue()

    if (name as! String != "") {

        print("name of selected contact = \(name)")
    } else {
        print("No name")
    }

Answer 1

只是一个假设。

ABMultiValueGetCount确实接受ABMultiValueRef!类型的参数，同时传递name类型的ABMultiValueRef?。

在Swift中这不是问题，但是这些功能被桥接到C，所以让我们尝试修复这种不一致。

请在这一行

let name: ABMultiValueRef? = ABRecordCopyValue(person, kABPersonFirstNameProperty)?.takeRetainedValue()

将此?替换为!，如下所示：

let name: ABMultiValueRef! = ABRecordCopyValue(person, kABPersonFirstNameProperty)?.takeRetainedValue()

让我知道它是否有效。