[英]Swift equivalent of my Objective-C block
我似乎无法弄清楚如何从 Swift 调用 Objective-C 块!
我有以下 Objective-C 方法:
- (void)myMethod:(NSDictionary *)selection success:(MyBlock)success;
MyBlock在哪里:
typedef void(^MyBlock)(BOOL success, NSDictionary* options);
它要么抱怨它无法投射:
"Cannot convert value of type '(Bool, Dictionary<AnyHashable, Any>) -> ()' to expected argument type 'MyBlock!' (aka 'ImplicitlyUnwrappedOptional<(Bool, Optional<Dictionary<AnyHashable, Any>>) -> ()>')"
或者当我尝试使用以下任一方法从 Swift 调用该方法时收到 SIGABRT:
myInstance.myMethod(myOptions) { (success, options) in
...
}
myInstance.myMethod(myOptions) { (success: Bool, options: Dictionary<AnyHashable, Any>?) in
...
}
myInstance.myMethod(myOptions) { (success: Bool!, options: [AnyHashable: Any]?) in
...
}
myInstance.myMethod(myOptions, success: { (success, options) in
...
})
myInstance.myMethod(myOptions, success: { (success, options) in
...
} as MyBlock)
myInstance.myMethod(myOptions, success: { (success: Bool, options: Dictionary<AnyHashable, Any>?) in
...
})
myInstance.myMethod(myOptions, success: { (success: Bool!, options: Dictionary<AnyHashable, Any>?) in
...
})
myInstance.myMethod(myOptions, success: { (success: Bool!, options: Dictionary<AnyHashable, Any>?) in
...
} as MyBlock)
myInstance.myMethod(myOptions, success: { (success: Bool!, options: [AnyHashable: Any]?) in
...
})
myInstance.myMethod(myOptions, success: { (success: Bool, options: [AnyHashable: Any]?) in
...
})
我该怎么办?
您的MyBlock的等效 swift 代码:
typedef void(^MyBlock)(BOOL success, NSDictionary* options)
- (void)myMethod:(NSDictionary *)selection success:(MyBlock)success;
如下:
public typealias MyBlock = (Bool, [String : Any]) -> (Void)
func myMethod(selection: [String : Any], success: MyBlock)
所以当你使用myMethod例如时:
self.myMethod(selection: yourDictionary) { (success, options) -> (Void) in
//handle here
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.