iOS开发——JS网页交互——javaScript

JS中调用OC

 #import "ViewController.h"

 @interface ViewController () <UIWebViewDelegate>
 @end

 @implementation ViewController

 - (void)viewDidLoad
 {
     [super viewDidLoad];
     // 1.webView
     UIWebView *webView = [[UIWebView alloc] init];
     webView.frame = self.view.bounds;
     webView.delegate = self;
     [self.view addSubview:webView];

     // 2.加载网页
     NSURL *url = [[NSBundle mainBundle] URLForResource:@"test" withExtension:@"html"];
     NSURLRequest *request = [NSURLRequest requestWithURL:url];
     [webView loadRequest:request];
 }

 #pragma mark - UIWebViewDelegate
 - (void)webViewDidFinishLoad:(UIWebView *)webView
 {

 }

 /**
  *  webView每当发送一个请求之前，都会先调用这个方法（能拦截所有请求）
  */
 - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
 {
     NSString *url = request.URL.absoluteString;
     NSRange range = [url rangeOfString:@"hm://"];
     NSUInteger loc = range.location;
     if (loc != NSNotFound) { // url的协议头是hm，也可以随便起
         // 方法名
         NSString *method = [url substringFromIndex:loc + range.length];

         // 转成SEL
 //        SEL sel = NSSelectorFromString(method);
 //        [self performSelector:sel withObject:nil];
         [self performSelector:NSSelectorFromString(method) withObject:nil];
     }
     return YES;
 }

 /**
  *  打电话
  */
 - (void)call
 {
     NSLog(@"call----");
 }

 /**
  *  打开照相机
  */
 - (void)openCamera
 {
     NSLog(@"openCamera----");
 }

 @end

HTML网页代码图