iOS 本地加载js文件

 #import "RootViewController.h"

 @interface RootViewController ()<UIWebViewDelegate>

 @property (nonatomic, strong)UIWebView *webView;

 @end

 @implementation RootViewController

 - (void)dealloc
 {
     self.webView = nil;
 }
 - (void)viewDidLoad {
     [super viewDidLoad];
     self.view.backgroundColor = [UIColor redColor];
     self.webView = [[UIWebView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
     [self.view addSubview:self.webView];
     // cli_dwr.html文件名
     [self loadDocument:@"cli_dwr.html"];
 }
 // 加载本地使用说明文件
 - (void)loadDocument:(NSString *)docName
 {
     NSString *mainBundleDirectory = [[NSBundle mainBundle] bundlePath];
     NSString *path = [mainBundleDirectory stringByAppendingPathComponent:docName];

     NSURL *url = [NSURL fileURLWithPath:path];
     NSURLRequest *request = [NSURLRequest requestWithURL:url];
     self.webView.scalesPageToFit = YES;
     [self.webView loadRequest:request];
 }

 @end