iOS WebView与h5

@interface BasicWebViewController ()
{
NSString *_requestUrl;
NSURLRequest *_lastRequest;

JSContext *_jsContext;NSMutableArray *_requestArray;//依次请求的requestNSInteger _ViewCounts;//当前H5加载页数NSDictionary *_navigationParam;//从H5请求来的导航栏信息UIActivityIndicatorView *_activityIndicator;BOOL _specialJumpJs;

}

@end

@implementation BasicWebViewController

-(void)loadView
{
_webView = [[UIWebView alloc]initWithFrame:[UIScreen mainScreen].applicationFrame];
_webView.backgroundColor = [UIColor colorWithRed:0.92 green:0.92 blue:0.92 alpha:1];
_webView.scrollView.showsHorizontalScrollIndicator = NO;
_webView.scrollView.showsVerticalScrollIndicator = NO;
_webView.delegate = self;
self.view = _webView;
}

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view.
  // self.navigationController.navigationBarHidden = NO;
  [self navigationConfig];

  NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];
  NSString *str = [[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding];
  NSString *url1 = [NSString stringWithFormat:@”%@%@?data=%@”,AppServer,_urlStr,str];
  if([_specialParameter length] != 0)
  {
  url1 = [NSString stringWithFormat:@”%@%@?%@”,AppServer_Address2,_urlStr,_specialParameter];
  }
  NSString *url = [url1 stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
  _requestUrl = url;

  NSURLRequest *webRequset = [NSURLRequest requestWithURL:[NSURL URLWithString:_requestUrl]];
  [self addHeaderRequest:webRequset];

}

//导航栏样式
- (void)navigationConfig
{
if(_isHideLeftItem)
{
_backButton.hidden = YES;
}
else
{
_backButton.hidden = NO;
}
self.navigationController.navigationBarHidden = NO;

_requestArray = [NSMutableArray array];

}

-(void)backViewController
{
if(_ViewCounts > 1)
{
_ViewCounts–;
[_requestArray removeLastObject];
[self addHeaderRequest:_requestArray.lastObject];
_ViewCounts–;
[_requestArray removeLastObject];
}
else
{
[super backViewController];
}
}

-(void)cancelAction
{
[self.navigationController popViewControllerAnimated:YES];
}

-(void)addHeaderRequest:(NSURLRequest *)request
{
NSMutableURLRequest *mutableRequest = [request mutableCopy];
request = [mutableRequest copy];

_lastRequest = request;if(_requestArray.count > 0){    for (int i = 0; i < _requestArray.count-1; i++) {        if([_lastRequest.URL isEqual:[_requestArray[i] URL]])        {            _ViewCounts = i;            [_requestArray removeObjectsInRange:NSMakeRange(i, _requestArray.count - i)];            break;        }    }}[_requestArray addObject:request];_ViewCounts++;[_webView loadRequest:request];

}

-(BOOL)webView:(UIWebView )webView shouldStartLoadWithRequest:(NSURLRequest )request navigationType:(UIWebViewNavigationType)navigationType
{
if(![request.URL isEqual:_lastRequest.URL])
{
[self addHeaderRequest:request];
}

return YES;

}

• (void) webViewDidStartLoad:(UIWebView *)webView
  {
  //创建UIActivityIndicatorView背底半透明View
  UIView *view = [[UIView alloc] initWithFrame:self.view.bounds];
  [view setTag:108];
  [view setBackgroundColor:[UIColor lightGrayColor]];
  [view setAlpha:0.8];
  [self.view addSubview:view];

  _activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 32.0f, 32.0f)];
  [_activityIndicator setCenter:self.view.center];
  [_activityIndicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhite];
  [view addSubview:_activityIndicator];

  [_activityIndicator startAnimating];
  }

• (void)removeActivity
  {
  [_activityIndicator stopAnimating];
  UIView view = (UIView)[self.view viewWithTag:108];
  [view removeFromSuperview];
  }

• (void)webView:(UIWebView )webView didFailLoadWithError:(nullable NSError )error
  {
  [self removeActivity];
  NSString *urlString = [[error userInfo] objectForKey:@”NSErrorFailingURLStringKey”];
  //在这里处理异常信息,例如需要登录,则需设置viewcounts =1
  }
  }

-(void)webViewDidFinishLoad:(UIWebView *)webView
{

[self removeActivity];if(_jsContext == nil){    // 1.    _jsContext = [webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];    BFLOG(@"_jsContext = %@",_jsContext);}// 2. 关联打印异常_jsContext.exceptionHandler = ^(JSContext *context, JSValue *exceptionValue) {    context.exception = exceptionValue;};__weak typeof(self) weakSelf = self;_jsContext[@"callAppFunc"] = ^(id param) {    [weakSelf navigationType:param]; };// Mozilla/5.0 (iPhone; CPU iPhone OS 10_10 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Mobile/12B411id userAgent = [webView stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];    //js方法名＋参数NSString* jsCode = @"sendDatatoApp()";//调用html页面的js方法[webView stringByEvaluatingJavaScriptFromString:jsCode];if(_isHideLeftItem && _ViewCounts == 1){    _backButton.hidden = YES;}else{    _backButton.hidden = NO;}

}

• (void)navigationType:(id)param
  {
  _navigationParam = [NSJSONSerialization JSONObjectWithData:[param dataUsingEncoding:NSUTF8StringEncoding]
  options:NSJSONReadingMutableContainers
  error:nil];
  if([_navigationParam[@”rightBtn”][@”text”] length] > 0)//文字类 右Item
  {
  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:_navigationParam[@”rightBtn”][@”text”] style:UIBarButtonItemStylePlain target:self action:@selector(toNext)];
  }
  if([_navigationParam[@”rightBtn”][@”img”] length] > 0)//图片类 右Item
  {
  if([_navigationParam[@”rightBtn”][@”img”] isEqualToString:@”search-lcon”])
  {
  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@”search”] style:UIBarButtonItemStylePlain target:self action:@selector(toNext)];
  }
  else
  {
  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:_navigationParam[@”rightBtn”][@”img”]] style:UIBarButtonItemStylePlain target:self action:@selector(toNext)];
  }
  }
  if([_navigationParam[@”rightBtn”][@”text”] length] == 0 && [_navigationParam[@”rightBtn”][@”img”] length] == 0)
  {
  self.navigationItem.rightBarButtonItem = nil;
  }
  // 加一个刷新按钮
  if([_navigationParam[@”title”] isEqualToString:@”—”])
  {
  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(refreshAction)];
  }
  if([_navigationParam[@”jump”] length] > 0)
  {
  if([_navigationParam[@”jump”] isEqualToString:@”dock”])
  {
  [_webView reload];
  self.tabBarController.selectedIndex = 0;
  }
  }
  }

• (void)toNext
  {
  NSURLRequest *request;
  if([_navigationParam[@”rightBtn”][@”url”] length] > 0)
  {
  request = [NSURLRequest requestWithURL:[NSURL URLWithString:_navigationParam[@”rightBtn”][@”url”]]];
  [self addHeaderRequest:request];
  }
  if([_navigationParam[@”rightBtn”][@”js”] length] > 0)
  {
  _specialJumpJs = YES;
  //js方法名＋参数
  NSString* jsCode = [NSString stringWithFormat:@”%@”,_navigationParam[@”rightBtn”][@”js”]];
  //调用html页面的js方法
  [_webView stringByEvaluatingJavaScriptFromString:jsCode];
  }
  }

• (void)refreshAction
  {
  [self addHeaderRequest:_requestArray.lastObject];
  }