Question

我有以下Objective-C代码：

NSMutableDictionary *options = // some values

options[kCRToastInteractionRespondersKey] = 
   @[[CRToastInteractionResponder interactionResponderWithInteractionType:CRToastInteractionTypeTap                                                                                                          
              automaticallyDismiss:YES                                                                                                                              
              block:^(CRToastInteractionType interactionType){                                                                                                                              
                  NSLog(@"Dismissed with %@ interaction", 
                  NSStringFromCRToastInteractionType(interactionType));                                                                                                                          
              }]];

我想在Swift中创建等价物：

var options:[NSObject:AnyObject] = [:]
options[kCRToastInteractionRespondersKey] = CRToastInteractionResponder(interactionType: CRToastInteractionType.Tap, automaticallyDismiss: true) { (r:CRToastInteractionType) -> Void in }

当我运行代码时，我收到错误：

ERROR given <CRToastInteractionResponder: 0x7b9e2cd0> for key kCRToastInteractionRespondersKey was expecting Class NSArray but got Class CRToastInteractionResponder, passing default on instead

如何在Swift中将CRToastInteractionResponder正确添加到NSDictionary中？

修改

我也试过

var options:NSDictionary = [:]

但是当我使用以下命令调用它时，我必须将选项投射到[NSObject : AnyObject]

CRToastManager.showNotificationWithOptions(options as [NSObject : AnyObject], completionBlock: { () -> Void in
  println("done!")
})

错误仍然相同。

Answer 1

我认为这是解决方案：

var options:[NSObject:AnyObject] = [:]
options[kCRToastInteractionRespondersKey] = [CRToastInteractionResponder(interactionType: CRToastInteractionType.Tap, automaticallyDismiss: true) { (r:CRToastInteractionType) -> Void in }]

Answer 2

NSDictionary在初始化时可以有对象，因此在初始化后无法添加对象。

所以你需要NSMutableDictionary。

你可以写

var options:NSMutableDictionary = NSMutableDictionary()
options .setObject("your object to store", forKey: kCRToastInteractionRespondersKey)

或者您可以将块的结果存储在 var 中，然后将其添加到字典中。

希望这会对你有所帮助。

在Swift中向NSDictionary添加一个Object

2 个答案: