swift - swift/如何在if语句中设置全局变量

我有下面的代码，它正在工作。

if passedValue == "location1" {
        var initialLocation = CLLocation(latitude: 48.8618, longitude: 2.1539)
        centerMapOnLocation(initialLocation)
        loadInitialData()
        }
if passedValue == "location2" {
        var initialLocation = CLLocation(latitude: 52.2398, longitude: 3.3579)
        centerMapOnLocation(initialLocation)
        loadInitialData()
        }

但为了更简洁，我写了这个，但我得到了以下错误消息：“使用未解析的标识符‘初始位置’”。知道吗？

if passedValue == "location1" {
        var initialLocation = CLLocation(latitude: 48.8618, longitude: 2.1539)
        }
if passedValue == "location2" {
        var initialLocation = CLLocation(latitude: 52.2398, longitude: 3.3579)
        }

centerMapOnLocation(initialLocation)
        loadInitialData()

最佳答案

声明var initialLocation: CLLocation!外部并使用initialLocation内部。
您可能还想在使用initialLocation之前检查centerMapOnLocation()是否为nil，以防万一。

if initialLocation != nil {
    centerMapOnLocation(initialLocation)
}

说明：centerMapOnLocation()无法看到initialLocation，因为它只存在于if语句的内部。
完整代码：

var initialLocation: CLLocation!
if passedValue == "location1" {
    initialLocation = CLLocation(latitude: 48.8618, longitude: 2.1539)
}
else if passedValue == "location2" {
    initialLocation = CLLocation(latitude: 52.2398, longitude: 3.3579)
}

if initialLocation != nil {
    centerMapOnLocation(initialLocation)
    loadInitialData()
}