iOS-工程中添加HTML代码，SSZipArchive库的使用

• 一.使用.bundle存放HTML代码

• 1、新建一个www文件夹，将HTML文件拷贝到www文件夹下面，然后将文件夹的名字改成www.bundle，如下图
  www文件夹.png
• 2、将www.bundle拖到工程里
  工程列表.png
• 3、上代码，web view加载HTML，此方法会加载www.bundle中的index.html页面

-(void)createCustomUI
{
    self.view.backgroundColor = [UIColor whiteColor];
    self.automaticallyAdjustsScrollViewInsets = NO;
   
    _webView = [[UIWebView alloc] init];
    _webView.frame = CGRectMake(0, 20, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height-20);
    _webView.delegate = self;
    [self.view addSubview:_webView];
//首先获取到www.bundle
    NSString *bundleString = [[NSBundle mainBundle].resourcePath stringByAppendingPathComponent:@"www.bundle"];
    NSBundle *bundle = [NSBundle bundleWithPath:bundleString];
//其次，获取到www.bundle下的index.html的路径
    NSString *urlString = [bundle pathForResource:@"index" ofType:@"html"];
//加载webview
    [_webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]]];
}

• 二、使用SSZipArchive解压zip压缩包，获取HTML代码(SSZipArchive github地址 https://github.com/ZipArchive/ZipArchive)

• 1、新建一个www文件夹，将HTML文件拷贝到www文件夹下面，压缩成www.zip文件，将www.zip压缩包拖到工程里

• 2、添加SSZipArchive第三方库，依赖于libz.tdb

  
  依赖库libz.tbd.png
• 3、上代码，通过用SSZipArchive第三方库，将www.zip解压成www文件夹存放到沙盒里，然后加载HTML

@property (nonatomic, strong) UIWebView *webView; //webview
@property(copy , nonatomic)NSString *documentPath;//沙盒里documents文件夹路径

-(void)viewDidLoad {
      [super viewDidLoad];
      //加载页面
      [self createCustomUI];
      //SSZipArchive解压www.zip
      [self performSelectorInBackground:@selector(unzip) withObject:nil];
}

-(void)createCustomUI
{
    self.view.backgroundColor = [UIColor whiteColor];
    self.automaticallyAdjustsScrollViewInsets = NO;
   
    _webView = [[UIWebView alloc] init];
    _webView.frame = CGRectMake(0, 20, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height-20);
    _webView.delegate = self;
    [self.view addSubview:_webView];
}
//通过比较不同的版本号，来判断是否进行解压操作
-(void)unzip
{
    NSDictionary *dict = [[NSBundle mainBundle] infoDictionary];
    if ([dict[@"CFBundleShortVersionString"] isEqual:[[NSUserDefaults standardUserDefaults] objectForKey:@"VersionString"]]) {
//无操作
    }
    else {
         NSString *zipPath = [[NSBundle mainBundle] pathForResource:@"www" ofType:@"zip"];
    NSString *destinationPath = self.documentPath;
    //将www.zip解压到沙盒里
    [SSZipArchive unzipFileAtPath:zipPath toDestination:destinationPath];
    //保存当前版本号
    [[NSUserDefaults standardUserDefaults] setObject:dict[@"CFBundleShortVersionString"] forKey:@"VersionString"];
    }
    //加载index.html
    [self performSelectorOnMainThread:@selector(showHtml) withObject:nil waitUntilDone:NO];
}

//懒加载，取得documents
-(NSString *)documentPath
{
    if (_documentPath == nil) {
        _documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    }
    return _documentPath;
}
//加载沙盒中documents/www/index.html页面
-(void)showHtml
{
    [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[self.documentPath stringByAppendingString:@"/www/index.html"]]]];
}