How to call JavaScript Function in objective C

Question

I am new programmer to objective C. I added some html file to Objective C. In this html file contains simple javascript function. I need to call that Function through thw ob

Answer 1

FileName.js :

function greet() {
    hello(“This is Javascript function!”);
}

Copy this file into Bundle resources.

Now #import in header file

 @property (nonatomic,strong) JSContext *context; // Declare this in header file

       // This code block goes into main file
        NSString *scriptPath = [[NSBundle mainBundle] pathForResource:@"FileName" ofType:@"js"];
        NSString *scriptString = [NSString stringWithContentsOfFile:scriptPath encoding:NSUTF8StringEncoding error:nil];

        self.context = [[JSContext alloc] init];
        [self.context evaluateScript:scriptString];

        self.context[@"hello"] = ^(NSString text) {
            NSLog(@"JS : %@",text);
        }

        JSValue *function = self.context[@"greet"];
        [function callWithArguments:@[]];

This code block worked for me. It displays "This is Javascript function!" in console. Hope this works!