ios - 在 Objective C 中看不到 Swift 变量/方法

Question

我无法从Objective C中看到要设置的方法/变量，myVar即使true我已经添加了@objcandpublic修饰符并且方法签名Bool中没有。setMyVarTrue()

Bool这可能是由 Swift和 Objective C之间的差异造成的BOOL。

其他类方法/变量是可见的，只是这个特定的不是。

如何Bool从 Objective C 设置 Swift？

SWIFT代码：

public class MyViewController : UIViewController {
    public var myVar:Bool = false

    @objc public func setMyVarTrue() {
        self.myVar = true
    }
}

目标C代码：

MyViewController* myViewController = [MyViewController new];
myViewController.myVar = true // Variable not found
myViewController.setMyVarTrue() // Method not found
[self presentViewController:myViewController animated:NO completion:nil];

Answer 1

你应该做

1. 将@objc 添加到您的班级声明中

2. 添加一个名为“yourName-swift.h”的文件，该文件应包含@class yourClass;

3. 在要调用的目标 C 文件中导入“yourName-swift.h”

你的快速课程

Answer 2

解决方案是清理并重建项目。Xcode 自动生成 swift 桥接头，在我的情况下，它在重新生成桥接头之前以（未找到变量/方法）错误停止构建过程。

SWIFT_CLASS("_TtC11MyProject25MyViewController")
@interface MyViewController : UIViewController
@property (nonatomic, strong) MBProgressHUD * _Nonnull progressIndicator;
- (nonnull instancetype)initWithNibName:(NSString * _Nullable)nibNameOrNil bundle:(NSBundle * _Nullable)nibBundleOrNil OBJC_DESIGNATED_INITIALIZER;
- (nullable instancetype)initWithCoder:(NSCoder * _Nonnull)aDecoder OBJC_DESIGNATED_INITIALIZER;
- (void)viewDidLoad;
- (void)viewWillAppear:(BOOL)animated;
- (void)submitProgressHandler:(NSNotification * _Nonnull)notification;
- (void)submitSuccessHandler;
- (void)submitFailureHandler:(NSNotification * _Nonnull)notification;
- (void)subscribe;
- (void)unsubscribe;
@end

现在它工作正常：

SWIFT_CLASS("_TtC11MyProject25MyViewController")
@interface MyViewController : UIViewController
@property (nonatomic, strong) MBProgressHUD * _Nonnull progressIndicator;
@property (nonatomic) BOOL closing;
- (nonnull instancetype)initWithNibName:(NSString * _Nullable)nibNameOrNil bundle:(NSBundle * _Nullable)nibBundleOrNil OBJC_DESIGNATED_INITIALIZER;
- (nullable instancetype)initWithCoder:(NSCoder * _Nonnull)aDecoder OBJC_DESIGNATED_INITIALIZER;
- (void)viewDidLoad;
- (void)viewWillAppear:(BOOL)animated;
- (void)setClosingTrue;
- (void)submitProgressHandler:(NSNotification * _Nonnull)notification;
- (void)submitSuccessHandler;
- (void)submitFailureHandler:(NSNotification * _Nonnull)notification;
- (void)subscribe;
- (void)unsubscribe;
@end