“[String : String]”类型的值没有成员 'major'

Question

当我想在我的字典中添加 String(beacons[index].major.stringValue) 时，出现以下错误：

Value of type "[String : String]" has no member 'major'

if(beacons.count > 0) {
    let nearestBeacon:CLBeacon = beacons[0]
    for var index = 0; index < beacons.count; index++ {
        let uuidString = "00000000-0000-0000-0000-000000000000"
        var beacons: [Dictionary<String, String>] = []
        beacons.append(["uuid": uuidString, "major": String(beacons[index].major.stringValue), "minor": beacons[index].minor.stringValue, "accurency": String(beacons[index].accuracy)])
        Server.beaconsSend(beacons) { // success, data in
            print(data)
        }
    }
}

Answer 1

可能是因为您在信标数组上处于某个条件（如果有）时创建了信标字典。你创建的beacons现在隐藏了beacon数组，你只引用字典

Answer 2

这一行

var beacons: [Dictionary<String, String>] = []

正在隐藏您原来的 beacons 阵列。这意味着在它定义的范围内（for 循环的主体），编译器认为 beacons 总是引用字典数组。简单的答案就是重命名它：

for var index = 0; index < beacons.count; index++ {
    let uuidString = "00000000-0000-0000-0000-000000000000"
    var myBeacons: [Dictionary<String, String>] = []
    myBeacons.append(["uuid": uuidString, "major": String(beacons[index].major.stringValue), "minor": beacons[index].minor.stringValue, "accurency": String(beacons[index].accuracy)])
    Server.beaconsSend(myBeacons) { // success, data in
        print(data)
    }
}

“[String : String]”类型的值没有成员 'major'

Value of type "[String : String]" has no member 'major'

string

iphone

types

ibeacon

swift