无法在带有参数列表的Swift 2中调用'sendAsynchronousRequest' [英] Cannot invoke 'sendAsynchronousRequest' in Swift 2 with an argument list

问题描述

我目前正在重写我的Swift 1.2代码的一部分，以与Swift 2.0兼容.实际上，我无法弄清楚对"sendAsynchronousRequest"进行了哪些更改-当前我的所有请求均失败

I'm currently rewriting parts of my Swift 1.2 code for compatibility with Swift 2.0. Actually I cannot figure out what changes are made to "sendAsynchronousRequest" - currently all my requests fail

NSURLConnection.sendAsynchronousRequest(request, queue: queue, completionHandler:{ (response: NSURLResponse!, data: NSData!, error: NSError!) -> Void in})

无法使用类型为参数的列表调用'sendAsynchronousRequest' '(NSURLRequest，队列:NSOperationQueue，complementHandler: (NSURLResponse !, NSData !, NSError！)->无效)'

Cannot invoke 'sendAsynchronousRequest' with an argument list of type '(NSURLRequest, queue: NSOperationQueue, completionHandler: (NSURLResponse!, NSData!, NSError!) -> Void)'

你有什么主意吗?

推荐答案

在Swift 1.2和Xcode 6.3中，sendAsynchronousRequest:queue:completionHandler:的签名为:

With Swift 1.2 and Xcode 6.3, the signature of sendAsynchronousRequest:queue:completionHandler: is:

class func sendAsynchronousRequest(request: NSURLRequest,
    queue: NSOperationQueue!,
    completionHandler handler: (NSURLResponse!, NSData!, NSError!) -> Void)

但是，在Swift 2和Xcode 7 beta中，sendAsynchronousRequest:queue:completionHandler:的签名已更改，现在为:

With Swift 2 and Xcode 7 beta, however, the signature of sendAsynchronousRequest:queue:completionHandler: has changed and is now:

// Note the non optionals, optionals and implicitly unwrapped optionals differences
class func sendAsynchronousRequest(request: NSURLRequest,
    queue: NSOperationQueue,
    completionHandler handler: (NSURLResponse?, NSData?, NSError?) -> Void)

因此，转到Swift 2和Xcode 7 beta，您将不得不更改completionHandler参数的实现，并确保queue参数是非可选的.

As a consequence, turning to Swift 2 and Xcode 7 beta, you will have to change your completionHandler parameter implementation and ensure that your queue parameter is a non optional.

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