js调用oc和oc调用js

一、js调用oc

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    NSURL *url=[[NSBundle mainBundle]URLForResource:@"test" withExtension:@"html"];
    NSURLRequest *request=[[NSURLRequest alloc]initWithURL:url];
    self.webview.delegate=self;
    [self.webview loadRequest:request];
    
}
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    NSLog(@"%@",request.URL.absoluteString);
    NSString *str=request.URL.absoluteString;
    NSRange range=[str rangeOfString:@"dswq:///"];
    NSUInteger location=range.location;
    if (location != NSNotFound) {
        NSString *method=[str substringFromIndex:location+range.length];
        SEL sel=NSSelectorFromString(method);
        [self performSelector:sel];
    }
    return YES;
}
-(void)openCamera{
    UIImagePickerController *pickerVC=[[UIImagePickerController alloc]init];
    pickerVC.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
    [self presentViewController:pickerVC animated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

　二、oc调用js

- (void)viewDidLoad {
    [superviewDidLoad];
    
   self.webView.scrollView.hidden =YES;
   self.webView.backgroundColor = [UIColorgrayColor];
    
   // 加载一个网页
   NSURL *url = [NSURLURLWithString:@"http://www.xianhua.cn/m/"];
   NSURLRequest *request = [NSURLRequestrequestWithURL:url];
    [self.webViewloadRequest:request];
}
#pragma mark - <UIWebViewDelegate>
-(void)webViewDidFinishLoad:(UIWebView *)webView{
   // 删除底部的广告
   NSString *str = @" document.getElementsByClassName('detail_btns2')[0].remove();";
    [webViewstringByEvaluatingJavaScriptFromString:str];
    
   // 修改标题
   NSString *str2 = @"document.getElementsByTagName('h1')[0].innerText = '－－鲜花网－－';";
    [webViewstringByEvaluatingJavaScriptFromString:str2];
    
   // 修改底部的标题
   NSString *str3 = @"document.getElementById('xiazaiapp').getElementsByTagName('a')[0].innerText = '－－下载鲜花网APP－－';";
    [webViewstringByEvaluatingJavaScriptFromString:str3];
}



转载：http://blog.csdn.net/wzios/article/details/61202082