Unable to access Swift 4 class from Objective-C: “Property not found on object of type”

Question

Using the latest Xcode 9 beta, I\'m seemingly completely unable to access properties on Swift classes. Even odder, I can access the class itself to instantiate it or whateve

Answer 1

1. When you add a swift file in your Objective-C project, Xcode will prompt to add Objective-C bridging header file, so allow the header file to be created.
2. In your Objective-C implementation file where you want to access the TestViewController property foobar. Use the following import syntax and replace the ProjectName with your project.

#import "ProjectName-Swift.h"

Objective-C implementation file:

#import "ViewController.h"
#import "ProjectName-Swift.h"

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    TestViewController *testViewController = [[TestViewController alloc] init]; // success
    BOOL prop = testViewController.foobar;
    NSLog(@"Property: %d", prop);
}

@end

For more details go through the Apple Documents