通过iOS中的按钮来触发html文件中按钮所触发的函数

html文件的代码

 1 <!DOCTYPE html>
 2 <html>
 3     <head>
 4         <title>标题</title>
 5     </head>
 6     
 7     <body>
 8         <input type="button" class="inputBut" name="test" value="send massage"
 9             onClick="myFunction()">
10     </body>
11     
12     <script type="text/javascript">
13         function myFunction()
14         {
15             alert("Hello World!");
16         }
17     </script>
18 </html>

iOS 工程的代码

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;


@end

 1 #import "AppDelegate.h"
 2 #import "RootViewController.h"
 3 @interface AppDelegate ()
 4 
 5 @end
 6 
 7 @implementation AppDelegate
 8 
 9 
10 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
11     self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
12     // Override point for customization after application launch.
13     self.window.backgroundColor = [UIColor whiteColor];
14     
15     self.window.rootViewController = [[RootViewController alloc] init];
16     
17     [self.window makeKeyAndVisible];
18     return YES;
19 }
20 
21 @end

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@end

 1 #import "RootViewController.h"
 2 
 3 @interface RootViewController ()
 4 
 5 @property (nonatomic, strong)UIWebView *webView;
 6 
 7 @end
 8 
 9 @implementation RootViewController
10 
11 - (void)viewDidLoad {
12     [super viewDidLoad];
13     self.webView = [[UIWebView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
14     [self.view addSubview:self.webView];
15 //    self.webView.hidden = YES;
16     
17     // 加载本地HTML文件
18     NSString *path = [[NSBundle mainBundle] pathForResource:@"button" ofType:@"html"];
19     NSURL *url = [NSURL URLWithString:path];
20     NSURLRequest *request = [NSURLRequest requestWithURL:url];
21     [self.webView loadRequest:request];
22     
23     // 添加按钮
24     UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
25     btn.frame = CGRectMake(100, 100, 80, 50);
26     btn.backgroundColor = [UIColor redColor];
27     [btn setTitle:@"触发js按钮" forState:0];
28     [btn addTarget:self action:@selector(callJavaScriptFunction:) forControlEvents:UIControlEventTouchUpInside];
29     [self.view addSubview:btn];
30     
31     
32 }
33 
34 - (void)callJavaScriptFunction:(UIButton *)sender
35 {
36     NSString *aString =  [self.webView stringByEvaluatingJavaScriptFromString:@"myFunction();"];
37     NSLog(@"=== %@",aString);
38 }
39 
40 @end