在webview上从javascript调用Objective-c函数

最近我做了这个互动，当我在寻找信息的时候，我看到网上没有那么多信息，所以，现在我解决了这个问题，我想与大家分享

应用程序中的第一个

On.h

进口

#import <JavaScriptCore/JavaScriptCore.h>

On.m

现在，在你的网页上

函数FuncWithParams（param1）{
Delegate.FuncWithParams（param1）；
}
函数FuncWithoutParams（）{
Delegate.FuncWithoutParams（）；
}

@property (nonatomic, readwrite, strong) JSContext *js;

- (void)viewDidLoad{

     NSString *address = @"http://yourpage.com";

     // Build the url and loadRequest
     NSString *urlString = [NSString stringWithFormat:@"%@",address];
     [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]]];

     //Get JSContext from webview
     self.js = [self.webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];

     //Set Delegate to JS object
     self.js[@"Delegate"] = self;

     //Set Handlers to events on JS
     self.js[@"Delegate"][@"FuncWithParams"] = ^(NSString *param1) {
         [self FuncWithParams:param1];
     };

     self.js[@"Delegate"][@"FuncWithoutParams"] = ^{
         [self FuncWithoutParams];
     };

}

//Handlers
- (void)FuncWithParams:(NSString *)param1 {
     NSLog(@"Param =%@", param1);
     //Do what you want
}

- (void)FuncWithoutParams {
    NSLog(@"FuncWithoutParams");
    //Do what you want
}