ios - Swift 不从 Objective-C header 导入 typedef

Question

似乎 Swift 无法识别 Objective-C-Header 中的 typedef，因为我收到以下错误:

无法从类型“MMDrawerControllerDrawerVisualStateBlock!”中找到用户定义的转换!输入“(MMDrawerController!, MMDrawerSide, CGFloat) -> Void”

我使用 MMDrawerController这是用 Objective-C 编写的，但我自己的代码是用 Swift 编写的。

typedef 看起来像这样:

typedef void (^MMDrawerControllerDrawerVisualStateBlock)(MMDrawerController * drawerController, MMDrawerSide drawerSide, CGFloat percentVisible);

为了清晰起见，这里有更多代码片段:

AppDelegate.swift

func initDrawerController() {
    drawerController = MMDrawerController(centerViewController: centerController, leftDrawerViewController: leftDrawerController, rightDrawerViewController: rightDrawerController)
    drawerController?.setDrawerVisualStateBlock(MMDrawerVisualState.parallaxVisualStateBlockWithParallaxFactor(2.0))
}

MMDrawerController.h

typedef void (^MMDrawerControllerDrawerVisualStateBlock)(MMDrawerController * drawerController, MMDrawerSide drawerSide, CGFloat percentVisible);

@interface MMDrawerController : UIViewController
-(void)setDrawerVisualStateBlock:(void(^)(MMDrawerController * drawerController, MMDrawerSide drawerSide, CGFloat percentVisible))drawerVisualStateBlock;
@end

MMDrawerVisualState.h

@interface MMDrawerVisualState : NSObject
+(MMDrawerControllerDrawerVisualStateBlock)parallaxVisualStateBlockWithParallaxFactor:(CGFloat)parallaxFactor;
@end

Module-Bridging-Header.h

#import "MMDrawerController.h"
#import "MMDrawerVisualState.h"

在构建它时，我的 AppDelegate 中出现错误，因为 setDrawerVisualStateBlock 的表达式，尽管 MMDrawerController.h 中有一个 typedef:

这是一个错误吗(因为在 Objective-C 上，它工作正常)？或者有没有人知道/知道如何处理它？非常感谢您的帮助，谢谢!

Answer 1

Objective-C typedef 声明(例如在 MMDrawerController.h 中):

typedef NS_ENUM(NSInteger, MMDrawerOpenCenterInteractionMode) {
    MMDrawerOpenCenterInteractionModeNone,
    MMDrawerOpenCenterInteractionModeFull,
    MMDrawerOpenCenterInteractionModeNavigationBarOnly,
};

在 Swift 中，它是这样导入的:

enum MMDrawerOpenCenterInteractionMode: NSInteger {
    case None
    case Full
    case Only
}

所以你可以在 Swift 中使用这个语法:

var mmDrawerViewController:MMDrawerController! = ....... ;
mmDrawerViewController.centerHiddenInteractionMode = MMDrawerOpenCenterInteractionMode.Full;

使用mmDrawerViewController.setDrawerVisualStateBlock()尝试

mmDrawerViewController.setDrawerVisualStateBlock{ (drawerController:MMDrawerController!, drawerSlide:MMDrawerSide!, cgFloat:CGFloat!) -> Void in
    println("setDrawerVisualStateBlock");
    ...
}