Swift 中的完成块 AFNetworking

Question

我正在开发一个 iOS 应用程序，它的基础是带有 AFNetworking 的 Objective-C，用于与 API 通信。现在我正在用 Swift 编写新的 ViewController，但在 Swift 文件中的 CompletionBlock 存在一些问题。

Objective-C 原代码：

- (void)downloadJson {
    [[ODDWebService sharedInstance] getParkingSpacesWithCompletionBlock:^(NSArray *result, BOOL succes) {
        if(succes) {
            [self.parkings removeAllObjects];

            for(NSDictionary *dict in result) {
                Parking *parking = [[Parking alloc] init];
                parking.name = [dict objectForKey:@"name"];
                parking.freespace = [[dict objectForKey:@"freespace"] integerValue];
                [self.parkings addObject:parking];
            }
            [self updateParkings];
        } else {
            NSLog(@"ERROR RETRIEVING PARKING SPACES");
        }
    }];
}

这就是我认为在 Swift 中应该是的：

func downloadJson() {
    ODDWebService.sharedInstance().getParkingSpacesWithCompletionBlock { (result: AnyObject, succes: Bool) -> Void in
        if(succes) {
            self.parkings.removeAllObjects()

            for dict: NSDictionary in result {
                var parking: Parking = Parking
                parking.name = dict["name"]
                parking.freespace = dict["freespace"].integerValue()
                parkings.addObject(parking)
            } else {
                NSLog("ERROR RETRIEVING PARKING SPACES")
            }
        }
    }
}

主要错误在第二行代码中：

'(AnyObject, Bool) -> Void' is not convertible to '(([AnyObject]!, Bool) -> Void)!'

Answer 1

您正在尝试将 NSArray 转换为 Anyobject。你能试试这个代码吗：

func downloadJson() {
    ODDWebService.sharedInstance().getParkingSpacesWithCompletionBlock { (result: [AnyObject]!, success: Bool) -> Void in
        if(succes) {
            self.parkings.removeAllObjects()

            for dict in result as NSArray {
                var parking: Parking = Parking
                parking.name = dict["name"]
                parking.freespace = dict["freespace"].integerValue()
                parkings.addObject(parking)
            } else {
                NSLog("ERROR RETRIEVING PARKING SPACES")
            }
        }
    }
}

Answer 2

替换

func downloadJson() {
ODDWebService.sharedInstance().getParkingSpacesWithCompletionBlock { (result: AnyObject, succes: Bool) -> Void in
    if(succes) {

有

func downloadJson() {
ODDWebService.sharedInstance().getParkingSpacesWithCompletionBlock {
result, success  in
    if(succes) {

还将以下代码中的第一行添加到您的代码中。

if let dicts = result as? NSDictionary<String, AnyObject> {
for dict: NSDictionary in dicts {
            var parking: Parking = Parking
            parking.name = dict["name"]