专门的静态崩溃ios应用程序

Question

import Foundation
import K

@objc class KU: NSObject {

static func setUpConfigs() {
    let productId = TNYEnvironment.sharedInstance().kProductID
    let url = TNYEnvironment.sharedInstance().kUrl
    K.sharedInstance.configureK(productId,
                                               url: NSURL(string: url)!)
}

static func trackEvent(eventName: String) {
    let formattedEventName = eventName.lowercaseString.stringByReplacingOccurrencesOfString(" ", withString: "_")
    self.trackEvent(formattedEventName, properties:[:])
}

static func trackEvent(eventName: String, properties: [String: NSObject]) {
    let instance = K.sharedInstance
    instance.track(eventName, params:properties)
    instance.uploadEvents({})
 }
}

它崩溃在ipa构建上，但在调试器上工作正常。我想swift到objc代码有些问题。有人有同样的问题吗？