ios - Swift Bridging-Header Objective-C presentViewController

Question

我正在尝试使用仅在 Objective-C 中可用的 View Controller 。我已经设置了我的 Bridging-Header，但是当我运行我的方法时，它不包含 presentViewController 并给出错误 No visible @interface for 'AlertSelector' declares the selector 'presentViewController. ..'

.m

#import "AlertSelector.h"

@implementation AlertSelector : NSObject

- (void) someMethod {
    NSLog(@"SomeMethod Ran");
    UIAlertController * view=   [UIAlertController
                             alertControllerWithTitle:@"My Title"
                             message:@"Select you Choice"
                             preferredStyle:UIAlertControllerStyleActionSheet];

    UIAlertAction* ok = [UIAlertAction
                     actionWithTitle:@"OK"
                     style:UIAlertActionStyleDefault
                     handler:^(UIAlertAction * action)
                     {
                         //Do some thing here
                         [view dismissViewControllerAnimated:YES completion:nil];

                     }];
    UIAlertAction* cancel = [UIAlertAction
                         actionWithTitle:@"Cancel"
                         style:UIAlertActionStyleDefault
                         handler:^(UIAlertAction * action)
                         {
                             [view dismissViewControllerAnimated:YES completion:nil];

                         }];

[view addAction:ok];
[view addAction:cancel];
[self presentViewController:view animated:YES completion:nil];
}

.h

@interface AlertSelector : NSObject

@property (strong, nonatomic) id someProperty;

- (void) someMethod;

@end

来自 swift

var instanceOfCustomObject: AlertSelector = AlertSelector()
    instanceOfCustomObject.someProperty = "Hello World"
    print(instanceOfCustomObject.someProperty)
    instanceOfCustomObject.someMethod()

Answer 1

您的 AlertSelector 类不是 UIViewController 的子类。这就是为什么您不能从 AlertSelector 的实例调用 [self presentViewController:view animated:YES completion:nil]; 的原因。

将 View Controller 参数添加到您的 someMethod 方法并从中呈现而不是自身。