oc与js交互

第一个blog

1.js注入

  [webView stringByEvaluatingJavaScriptFromString:@"alertMessage(\"tgw\")"];

2.oc调用js

[self.webView stringByEvaluatingJavaScriptFromString:@"document.title"]

 self.context[@"rnd"] = ^(){        return @2;//        [myself caWithNumber:@2];//        [self caWithNumber:@2];    };

- (IBAction)sendToJS:(id)sender {    NSNumber *inputNumber = [NSNumber numberWithInteger:[self.textField.text integerValue]];    JSValue *function = [self.context objectForKeyedSubscript:@"factorial"];    JSValue *result = [function callWithArguments:@[inputNumber]];    self.showLable.text = [NSString stringWithFormat:@"%@", [result toNumber]];}