Swift iOS API controller stopped working

问题

I am using a file to handle my calls to my APIs which looks like this:

import UIKit

protocol APIControllerProtocol {
    func JSONAPIResults(results: NSArray)

}

class APIController: NSObject {
    var delegate:APIControllerProtocol?

    func GetAPIResultsAsync(urlString:String, elementName:String) {

        //The Url that will be called
        var url = NSURL.URLWithString(urlString)
        //Create a request
        var request: NSURLRequest = NSURLRequest(URL: url)
        //Create a queue to hold the call
        var queue: NSOperationQueue = NSOperationQueue()

        // Sending Asynchronous request using NSURLConnection
        NSURLConnection.sendAsynchronousRequest(request, queue: queue, completionHandler:{(response:NSURLResponse!, responseData:NSData!, error: NSError!) ->Void in
            var error: AutoreleasingUnsafeMutablePointer<NSError?> = nil
            //Serialize the JSON result into a dictionary
            let jsonResult: NSDictionary! = NSJSONSerialization.JSONObjectWithData(responseData, options:NSJSONReadingOptions.MutableContainers, error: error) as? NSDictionary

            //If there is a result add the data into an array
            if jsonResult.count>0 && jsonResult["\(elementName)"]?.count > 0 {

                var results: NSArray = jsonResult["\(elementName)"] as NSArray
                //Use the completion handler to pass the results
                self.delegate?.JSONAPIResults(results)

            } else {

                println(error)
            }
        })
    }
}

I am calling it using something similar to this:

var APIBaseUrl: String = "http://***.se/**/**.php"
        var urlString:String = "\(APIBaseUrl)"

        self.api.delegate = self
        api.GetAPIResultsAsync(urlString, elementName:"groupActivities")

This have recently worked great but now my app crashes and i get this row in the APIController highlighted:

let jsonResult: NSDictionary! = NSJSONSerialization.JSONObjectWithData(responseData, options:NSJSONReadingOptions.MutableContainers, error: error) as? NSDictionary

The only thing that i can think of that have changed is that i switched from mobile 4G internet to my WiFi.

In the log i get: fatal error: unexpectedly found nil while unwrapping an Optional value

The highlight says: Thread 5: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)

This occurs regardless of what API i'm calling. I'm running Xcode 6.0.1 and have not done any recent updates.

Cheers!

回答1:

Lots of People are reporting a bug with Xcode 6.0 GM and Wifi connection.

In order to resolve this issue try these steps

Close your Simulator
Close your Xcode
Go to your DerviedData folder and remove all folders underneath it. (~/Library/Developer/Xcode/DerivedData) Don't worry the folders will be created again when you open your project in Xcode.

来源：https://stackoverflow.com/questions/25994608/swift-ios-api-controller-stopped-working

标签

ios

json

swift

nsjsonserialization