对"urlComponents"的访问重叠，但修改需要排他访问

本文介绍了对"urlComponents"的访问重叠，但修改需要排他访问的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试在iOS 11和Swift 4上使用Lyft API，并且在第二行收到错误

I am trying to use the Lyft API with iOS 11 and Swift 4, and am receiving an error on the second line, which is

我不确定这意味着什么，以及如何解决它.感谢您的任何帮助，谢谢！

I am unsure what this means, and how I can get around it. Any help is appreciated, thanks!

let queryItems = parameters
    .sorted { $0.0 < $1.0 }
    .flatMap { components(forKey: $0, value: $1) }
var urlComponents = URLComponents(url: mutableURLRequest.url!, resolvingAgainstBaseURL: false)
urlComponents?.queryItems = (urlComponents?.queryItems ?? []) + queryItems //error here

推荐答案

我想您需要先将其设置为局部变量，然后再对其进行更改，请尝试以下操作:

I guess you need to set first to a local variable and then change it , try this:

var urlComponents = URLComponents(url: mutableURLRequest.url!, resolvingAgainstBaseURL: false)
var localVariable = urlComponents
urlComponents?.queryItems = (localVariable?.queryItems ?? []) + queryItems

这篇关于对"urlComponents"的访问重叠，但修改需要排他访问的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！