Issue with ScrollableGraphicView Swift Library in Objective C project

Question

Hello everyone for my chart in my app I'm using the MIT ScrollableGraphView library written entirely in Swift Language.

This is the link of Ghitub https://github.com/philackm/ScrollableGraphView

To use this library in my ObjectiveC project, I imported this into my view controller file:

#import "TargetName-Swift.h"

Then to work with the library we need to include <ScrollableGraphViewDataSource>

At this point the documentation says to allocate the class in this way

ScrollableGraphView * graphView = [[ScrollableGraphView alloc] initWithFrame: self.view.frame dataSource: self];

This is my complete ViewController.m

#import "TargetName-Swift.h"

@interface Dashboard () <ScrollableGraphViewDataSource>
@end

@implementation Dashboard

- (void)viewDidLoad {
    [super viewDidLoad];

    ScrollableGraphView *graphView = [[ScrollableGraphView alloc] initWithFrame: self.view.frame dataSource: self];
    [self.view addSubview: graphView];
}

My problem is that xCode returns this error to me

No visible @interface for 'ScrollableGraphView' declares the selector 'initWithFrame: dataSource:'

I think I have followed all the necessary instructions to use this library but I do not understand why I can not find the class allocation with datasource

In the ScrollableGraphView.swift file, the class allocation also includes the datasource

public init (frame: CGRect, dataSource: ScrollableGraphViewDataSource) {
        self.dataSource = dataSource
        super.init (frame: frame)
    }

so I do not understand why I can not allocate the class in objective C ..

Where am I doing wrong? has anyone ever used this library? do you know how to solve the problem?

Answer 1

It seems that in my case the class allocation in the swift source file did not have the extension @objc

As soon as I added this before initialization, everything worked perfectly for me ...

This was the change:

Old source

public init(frame: CGRect, dataSource: ScrollableGraphViewDataSource) {
        self.dataSource = dataSource
        super.init(frame: frame)
    }

Source with the addition of @ objc

@objc public init(frame: CGRect, dataSource: ScrollableGraphViewDataSource) {
        self.dataSource = dataSource
        super.init(frame: frame)
    }

Now everything works ... I also thank OOPer for his suggestion that in this case it was correct!