我试图使用与iOS 11和Swift 4的Lyft API,并在第二行收到错误,这是
重叠访问'urlComponents',但修改需要独占访问; 考虑复制到局部变量.
我不确定这意味着什么,以及如何绕过它.任何帮助表示赞赏,谢谢!
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
我有一个C#方法,其中使用params关键字声明了一个可变长度参数列表:
public void VariableLengthParameterFunction (object firstParam,
params object[] secondParam)
调用方法时有没有办法使用命名参数？
我是autolayout的新手.有人可以解释为什么这不起作用？MAFeedbackCell是两个标签的容器.有在容器等标签,但是这两个:0xaa3aca0和0x14395240是有冲突的.
2014-09-28 08:38:26.056 beats[1052:60b] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSLayoutConstraint:0xaa3aea0 UILabel:0xaa3aca0.width …