如何在Swift中调用Objective-C块的属性

我正在重写Swift中的一些Objective-C代码。 它是一个名为ActionSheetPicker的开放库的子类。 所以这里是我的Objective-C代码：

#import "XXActionSheetStringPicker.h" @implementation XXActionSheetStringPicker + (instancetype)pickerWithTitle:(NSString *)title rows:(NSArray *)strings initialSelection:(NSInteger)index doneBlock:(ActionStringDoneBlock)doneBlock cancelBlock:(ActionStringCancelBlock)cancelBlockOrNil origin:(id)origin { XXActionSheetStringPicker *picker = [[self alloc] initWithTitle:title rows:strings initialSelection:index doneBlock:doneBlock cancelBlock:cancelBlockOrNil origin:origin]; //do something specific stuff UIBarButtonItem *cancelBarButton = [self itemWithtitle:NSLocalizedString(@"GLOBAL_CANCEL", nil) action:@selector(cancelAction) target:picker]; [picker setCancelButton:cancelBarButton]; UIBarButtonItem *doneBarButton = [self itemWithtitle:NSLocalizedString(@"GLOBAL_OK", nil) action:@selector(doneAction) target:picker]; [picker setDoneButton:doneBarButton]; return picker; } + (UIBarButtonItem *)itemWithtitle:(NSString *)title action:(SEL)action target:(id)target { UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeSystem]; //do something specific stuff [cancelButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside]; UIBarButtonItem *cancelBarButton = [[UIBarButtonItem alloc] initWithCustomView:cancelButton]; return cancelBarButton; } - (void)cancelAction { [self onActionSheetCancel]; } - (void)doneAction { [self onActionSheetDone]; } @end 

这就是我在Swift中如何做同样的事情：

 import ActionSheetPicker_3_0 class XXActionSheetStringPicker: ActionSheetStringPicker { override init!(title: String!, rows strings: [Any]!, initialSelection index: Int, doneBlock: ActionSheetPicker_3_0.ActionStringDoneBlock!, cancel cancelBlockOrNil: ActionSheetPicker_3_0.ActionStringCancelBlock!, origin: Any!) { super.init(title: title, rows: strings, initialSelection: index, doneBlock: doneBlock, cancel: cancelBlockOrNil, origin: origin) //do somet specific stuff let cancelBarButton = self.itemWithtitle(NSLocalizedString("GLOBAL_CANCEL", comment: ""), action: #selector(self.cancelAction), target: self) self.setCancelButton(cancelBarButton) let doneBarButton = self.itemWithtitle(NSLocalizedString("GLOBAL_OK", comment: ""), action: #selector(self.doneAction), target: self) self.setDoneButton(doneBarButton) } func itemWithtitle(_ title: String, action: Selector, target: Any) -> UIBarButtonItem { let cancelButton = UIButton(type: .system) //do somet specific stuff cancelButton.addTarget(target, action: action, for: .touchUpInside) let cancelBarButton = UIBarButtonItem(customView: cancelButton) return cancelBarButton } func cancelAction() { self.onActionSheetCancel() } func doneAction() { self.onActionSheetDone() } } 

但我不能做self.onActionSheetCancel() ，因为'不能调用非函数types的ActionStringCancelBlock ！ （DoneBlock）错误。

块是：

 typedef void(^ActionStringDoneBlock)(ActionSheetStringPicker *picker, NSInteger selectedIndex, id selectedValue); typedef void(^ActionStringCancelBlock)(ActionSheetStringPicker *picker); @property (nonatomic, copy) ActionStringDoneBlock onActionSheetDone; @property (nonatomic, copy) ActionStringCancelBlock onActionSheetCancel; 

有没有修复/解决方法？ 感谢帮助。