Ios 线程1:致命错误：for循环中的索引超出范围

在我的sampllat和sampllong中，数组包含40个双值，reflat long数组包含9个双值

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您的问题在内部循环中，特别是在以下方面：

for testing1 in (0...refLat.count).reversed()

这将比refLat中的值多迭代一次，您需要的是：

for testing1 in (0..<refLat.count).reversed()

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}

计数器从不重置0…refLat.count错误。应该是0..，这正是我建议人们永远不要写0..@Alexander的原因，值得一提的是，并非每个集合都必须从0索引开始和/或一直到count-1。ArraySlice还符合RandomAccessCollection

for testing1 in (0..<refLat.count).reversed()

// counterS will be generated and managed by the for loop
for counterS in (0..<sampLat.count) {

    let coordinates = CLLocation(latitude:sampLat[counterS], longitude:sampLong[counterS])

    // same for counterR
    for counterR in (0..<refLat.count).reversed()
    {

        let coordinates2 = CLLocation(latitude:refLat[counterR], longitude:refLong[counterR])

        let distanceInMeters = coordinates.distance(from: coordinates2)

        // I will use string interpolation
        print("distance found - \(distanceInMeters)")

        print("Counter Reference - \(counterR)")

        if distanceInMeters <= 50 {
            print("crossed check point for - \(counterR)")
        } else {
            print("out of range")
        }
        print("---------------------------------------")
    }

    print("Counter Sample \(testing)")
    print("******************************************")