完成塊AFNetworking在Swift

Question

我正在研究iOS應用程序，其基礎是Objective-C與AFNetworking與API進行通信。現在我在Swift中編寫新的ViewControllers，並且在Swift文件中的CompletionBlock中遇到了一些問題。

原來的Objective-C代碼：

- (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"); 
     } 
    }]; 
} 

這是我認爲它應該是在斯威夫特：

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") 
      } 
     } 
    } 
} 

主要錯誤是在第二行代碼中發現：

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

Answer 1

更換

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

隨着

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

同時添加的第一行下面的代碼到你的代碼。

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

Answer 2

您正試圖將NSArray強制轉換爲Anyobject。你可以試試這個代碼：

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") 
      } 
     } 
    } 
}