UIWebView 操作

1 #import <UIKit/UIKit.h>
2 
3 @interface ViewController : UITableViewController
4 @property (copy, nonatomic) NSArray *arrSampleName;
5 
6 - (instancetype)initWithSampleNameArray:(NSArray *)arrSampleName;
7 
8 @end 

 1 #import "ViewController.h"
 2 #import "SimpleBrowserViewController.h"
 3 #import "PageInteractionViewController.h"
 4 #import "PageCallOCFunctionViewController.h"
 5 
 6 @interface ViewController ()
 7 - (void)layoutUI;
 8 @end
 9 
10 @implementation ViewController
11 - (void)viewDidLoad {
12     [super viewDidLoad];
13     
14     [self layoutUI];
15 }
16 
17 - (void)didReceiveMemoryWarning {
18     [super didReceiveMemoryWarning];
19     // Dispose of any resources that can be recreated.
20 }
21 
22 - (instancetype)initWithSampleNameArray:(NSArray *)arrSampleName {
23     if (self = [super initWithStyle:UITableViewStyleGrouped]) {
24         self.navigationItem.title = @"UIWebView 操作";
25         self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:nil action:nil];
26         
27         _arrSampleName = arrSampleName;
28     }
29     return self;
30 }
31 
32 - (void)layoutUI {
33     
34 }
35 
36 #pragma mark - UITableViewController相关方法重写
37 - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
38     return 0.1;
39 }
40 
41 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
42     return 1;
43 }
44 
45 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
46     return [_arrSampleName count];
47 }
48 
49 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
50     static NSString *cellIdentifier = @"cell";
51     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
52     if (!cell) {
53         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
54     }
55     cell.textLabel.text = _arrSampleName[indexPath.row];
56     return cell;
57 }
58 
59 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
60     switch (indexPath.row) {
61         case 0: {
62             SimpleBrowserViewController *simpleBrowserVC = [SimpleBrowserViewController new];
63             [self.navigationController pushViewController:simpleBrowserVC animated:YES];
64             break;
65         }
66         case 1: {
67             PageInteractionViewController *pageInteractionVC = [PageInteractionViewController new];
68             [self.navigationController pushViewController:pageInteractionVC animated:YES];
69             break;
70         }
71         case 2: {
72             PageCallOCFunctionViewController *pageCallOCFunctionVC = [PageCallOCFunctionViewController new];
73             [self.navigationController pushViewController:pageCallOCFunctionVC animated:YES];
74             break;
75         }
76         default:
77             break;
78     }
79 }
80 
81 @end 

1 #define kTitleOfSimpleBrowser @"简单浏览器"
2 #define kTitleOfPageInteraction @"页面交互"
3 #define kTitleOfPageCallOCFunction @"页面调用 OC 方法"
4 
5 #define kApplication [UIApplication sharedApplication] 

 1 #import <UIKit/UIKit.h>
 2 
 3 @interface SimpleBrowserViewController : UIViewController <UISearchBarDelegate, UIWebViewDelegate>
 4 @property (strong, nonatomic) UISearchBar *searchBar;
 5 @property (strong, nonatomic) UIWebView *webView;
 6 @property (strong, nonatomic) UIToolbar *toolbar;
 7 @property (strong, nonatomic) UIBarButtonItem *barBtnBack;
 8 @property (strong, nonatomic) UIBarButtonItem *barBtnForward;
 9 
10 @end 

  1 #import "SimpleBrowserViewController.h"
  2 
  3 @interface SimpleBrowserViewController ()
  4 - (void)webViewBack;
  5 - (void)webViewForward;
  6 - (void)layoutUI;
  7 - (void)sendRequest:(NSString *)requestURLStr;
  8 - (void)changeBarButtonStatus;
  9 @end
 10 
 11 @implementation SimpleBrowserViewController
 12 
 13 - (void)viewDidLoad {
 14     [super viewDidLoad];
 15     
 16     [self layoutUI];
 17 }
 18 
 19 - (void)didReceiveMemoryWarning {
 20     [super didReceiveMemoryWarning];
 21     // Dispose of any resources that can be recreated.
 22 }
 23 
 24 - (void)webViewBack {
 25     [_webView goBack];
 26 }
 27 
 28 - (void)webViewForward {
 29     [_webView goForward];
 30 }
 31 
 32 - (void)layoutUI {
 33     self.navigationItem.title = kTitleOfSimpleBrowser;
 34     self.automaticallyAdjustsScrollViewInsets = NO; //是否自动适应滚动视图的内嵌入；默认为YES，这里设置为NO，避免网页控件中_UIWebViewScrollView的UIWebBrowserView位置偏移
 35     
 36     CGRect rect = [[UIScreen mainScreen] bounds];
 37     static const CGFloat heightOfStatusBarAndNavigationBar = 64.0;
 38     CGFloat widthOfScreen = rect.size.width;
 39     CGFloat heightOfScreen  = rect.size.height;
 40     
 41     //添加搜索栏
 42     _searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0.0, heightOfStatusBarAndNavigationBar, widthOfScreen, 44.0)];
 43     _searchBar.delegate = self;
 44     _searchBar.placeholder = @"请输入以file://或http开头的地址";
 45     [self.view addSubview:_searchBar];
 46     
 47     //添加工具栏和左右按钮（回退和前进）
 48     _toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0.0, heightOfScreen - 44.0,
 49                                                            widthOfScreen, 44.0)];
 50     rect = CGRectMake(0.0, 0.0, 32.0, 32.0);
 51     UIButton *btnBack = [UIButton buttonWithType:UIButtonTypeCustom];
 52     btnBack.frame = rect;
 53     [btnBack setImage:[UIImage imageNamed:@"LastPageNormal"] forState:UIControlStateNormal];
 54     [btnBack setImage:[UIImage imageNamed:@"LastPageDisabled"] forState:UIControlStateDisabled];
 55     [btnBack addTarget:self
 56                 action:@selector(webViewBack)
 57       forControlEvents:UIControlEventTouchUpInside];
 58     _barBtnBack = [[UIBarButtonItem alloc] initWithCustomView:btnBack];
 59     _barBtnBack.enabled = NO;
 60     
 61     UIBarButtonItem *barBtnSpacing=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
 62     
 63     UIButton *btnForward = [UIButton buttonWithType:UIButtonTypeCustom];
 64     btnForward.frame = rect;
 65     [btnForward setImage:[UIImage imageNamed:@"NextPageNormal"] forState:UIControlStateNormal];
 66     [btnForward setImage:[UIImage imageNamed:@"NextPageDisabled"] forState:UIControlStateDisabled];
 67     [btnForward addTarget:self
 68                    action:@selector(webViewForward)
 69          forControlEvents:UIControlEventTouchUpInside];
 70     _barBtnForward = [[UIBarButtonItem alloc] initWithCustomView:btnForward];
 71     _barBtnForward.enabled = NO;
 72     
 73     _toolbar.items = @[ _barBtnBack, barBtnSpacing, _barBtnForward ];
 74     [self.view addSubview:_toolbar];
 75     
 76     //添加网页控件
 77     CGFloat heightOfWebView = heightOfScreen - _searchBar.frame.origin.y - _searchBar.frame.size.height - _toolbar.frame.size.height;
 78     _webView = [[UIWebView alloc] initWithFrame:CGRectMake(0.0, heightOfStatusBarAndNavigationBar + _searchBar.frame.size.height,
 79                                                            widthOfScreen, heightOfWebView)];
 80     _webView.dataDetectorTypes = UIDataDetectorTypeAll;
 81     _webView.delegate = self;
 82     [self.view addSubview:_webView];
 83 }
 84 
 85 - (void)sendRequest:(NSString *)requestURLStr {
 86     if (requestURLStr.length > 0) {
 87         NSURL *requestURL;
 88         
 89         //加载bundle中的文件；网页控件打开本地pdf、word文件依靠的并不是他自身解析，而是依靠MIME Type识别文件类型并调用对应应用打开
 90         if ([requestURLStr hasPrefix:@"file://"]) {
 91             NSRange range = [requestURLStr rangeOfString:@"file://"];
 92             NSString *fileName = [requestURLStr substringFromIndex:range.length];
 93             requestURL = [[NSBundle mainBundle] URLForResource:fileName
 94                                                  withExtension:nil];
 95         } else {
 96             //加载百度搜索网站的内容
 97             if (![requestURLStr hasPrefix:@"http"]) {
 98                 requestURLStr = [NSString stringWithFormat:@"https://www.baidu.com/s?wd=%@", requestURLStr];
 99             }
100             //最终加载的还是HTTP或者HTTPS协议的网站内容，进行编码操作
101             requestURLStr = [requestURLStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
102             requestURL = [NSURL URLWithString:requestURLStr];
103         }
104         
105         //加载请求地址内容
106         [_webView loadRequest:[NSURLRequest requestWithURL:requestURL]];
107     }
108 }
109 
110 - (void)changeBarButtonStatus {
111     _barBtnBack.enabled = _webView.canGoBack;
112     _barBtnForward.enabled = _webView.canGoForward;
113 }
114 
115 #pragma mark - UIWebViewDelegate
116 - (void)webViewDidStartLoad:(UIWebView *)webView {
117     kApplication.networkActivityIndicatorVisible = YES;
118 }
119 
120 - (void)webViewDidFinishLoad:(UIWebView *)webView {
121     kApplication.networkActivityIndicatorVisible = NO;
122     [self changeBarButtonStatus];
123 }
124 
125 - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
126     NSLog(@"Error: %@", error);
127     kApplication.networkActivityIndicatorVisible = NO;
128     UIAlertView *alertVCustom = [[UIAlertView alloc] initWithTitle:@"提示信息"
129                                                            message:@"网络连接错误"
130                                                           delegate:nil
131                                                  cancelButtonTitle:@"确定"
132                                                  otherButtonTitles:nil, nil];
133     [alertVCustom show];
134 }
135 
136 #pragma mark - UISearchBarDelegate
137 - (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
138     [self sendRequest:searchBar.text];
139     [_searchBar resignFirstResponder];
140 }
141 
142 @end 

1 #import <UIKit/UIKit.h>
2 
3 @interface PageInteractionViewController : UIViewController<UIWebViewDelegate>
4 @property (strong, nonatomic) UIWebView *webView;
5 
6 @end 

 1 #import "PageInteractionViewController.h"
 2 
 3 @interface PageInteractionViewController ()
 4 - (void)layoutUI;
 5 - (void)sendRequest;
 6 @end
 7 
 8 @implementation PageInteractionViewController
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     
13     [self layoutUI];
14     
15     [self sendRequest];
16 }
17 
18 - (void)didReceiveMemoryWarning {
19     [super didReceiveMemoryWarning];
20     // Dispose of any resources that can be recreated.
21 }
22 
23 - (void)layoutUI {
24     self.navigationItem.title = kTitleOfPageInteraction;
25     self.automaticallyAdjustsScrollViewInsets = NO; //是否自动适应滚动视图的内嵌入；默认为YES，这里设置为NO，避免网页控件中_UIWebViewScrollView的UIWebBrowserView位置偏移
26     
27     CGRect rect = [[UIScreen mainScreen] bounds];
28     static const CGFloat heightOfStatusBarAndNavigationBar = 64.0;
29     //添加网页控件
30     _webView = [[UIWebView alloc] initWithFrame:CGRectMake(0.0, heightOfStatusBarAndNavigationBar,
31                                                            rect.size.width, rect.size.height - heightOfStatusBarAndNavigationBar)];
32     _webView.dataDetectorTypes = UIDataDetectorTypeAll;
33     _webView.delegate = self;
34     self.automaticallyAdjustsScrollViewInsets = NO;
35     [self.view addSubview:_webView];
36 }
37 
38 - (void)sendRequest {
39     NSString *htmlStr=@"<html>40                             <head><title>KenmuHuang‘s Blog</title></head>41                             <body style=\"color:#0044AA;\">\
42                                 <h3 id=\"header\">I‘m KenmuHuang</h3>\
43                                 <p>More coding, more thinking. Stay hungry, stay foolish.</p>44                                 <span>http://www.cnblogs.com/huangjianwu/</span>\
45                             </body>46                         </html>";
47     [_webView loadHTMLString:htmlStr baseURL:nil];
48 }
49 
50 #pragma mark - UIWebViewDelegate
51 - (void)webViewDidStartLoad:(UIWebView *)webView {
52     kApplication.networkActivityIndicatorVisible = YES;
53 }
54 
55 - (void)webViewDidFinishLoad:(UIWebView *)webView {
56     kApplication.networkActivityIndicatorVisible = NO;
57     NSLog(@"%@",[_webView stringByEvaluatingJavaScriptFromString:@"document.title"]); //打印内容为html的title标签内容：KenmuHuang‘s Blog
58     NSLog(@"%@",[_webView stringByEvaluatingJavaScriptFromString:@"document.getElementById(‘header‘).innerHTML=‘KenmuHuang\\‘s Blog‘;"]); //必须使用双反斜杆来转译单引号
59 }
60 
61 - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
62     NSLog(@"Error: %@", error);
63     kApplication.networkActivityIndicatorVisible = NO;
64     UIAlertView *alertVCustom = [[UIAlertView alloc] initWithTitle:@"提示信息"
65                                                            message:@"网络连接错误"
66                                                           delegate:nil
67                                                  cancelButtonTitle:@"确定"
68                                                  otherButtonTitles:nil, nil];
69     [alertVCustom show];
70 }
71 
72 @end 

 1 function showSheet(title, cancelButtonTitle, destructiveButtonTitle, otherButtonTitle) {
 2     var url = ‘KMActionSheet://?‘;
 3     var paramas = title + ‘&‘ + cancelButtonTitle + ‘&‘ + destructiveButtonTitle;
 4     if(otherButtonTitle) {
 5         paramas += ‘&‘ + otherButtonTitle;
 6     }
 7     window.location.href = url + encodeURIComponent(paramas);
 8 }
 9 
10 var header = document.getElementById(‘header‘);
11 if(header) {
12     header.onclick = function(){
13         showSheet(‘系统提示‘, ‘取消‘, ‘确定‘, null);
14     };
15 } 

1 #import <UIKit/UIKit.h>
2 
3 @interface PageCallOCFunctionViewController : UIViewController<UIWebViewDelegate>
4 @property (strong, nonatomic) UIWebView *webView;
5 
6 @end 

  1 #import "PageCallOCFunctionViewController.h"
  2 
  3 @interface PageCallOCFunctionViewController ()
  4 - (void)layoutUI;
  5 - (void)sendRequest;
  6 - (void)showActionSheetWithTitle:(NSString *)title cancelButtonTitle:(NSString *)cancelButtonTitle destructiveButtonTitle:(NSString *)destructiveButtonTitle otherButtonTitle:(NSString *)otherButtonTitle;
  7 @end
  8 
  9 @implementation PageCallOCFunctionViewController
 10 
 11 - (void)viewDidLoad {
 12     [super viewDidLoad];
 13     
 14     [self layoutUI];
 15     
 16     [self sendRequest];
 17 }
 18 
 19 - (void)didReceiveMemoryWarning {
 20     [super didReceiveMemoryWarning];
 21     // Dispose of any resources that can be recreated.
 22 }
 23 
 24 - (void)layoutUI {
 25     self.navigationItem.title = kTitleOfPageCallOCFunction;
 26     self.automaticallyAdjustsScrollViewInsets = NO; //是否自动适应滚动视图的内嵌入；默认为YES，这里设置为NO，避免网页控件中_UIWebViewScrollView的UIWebBrowserView位置偏移
 27     
 28     CGRect rect = [[UIScreen mainScreen] bounds];
 29     static const CGFloat heightOfStatusBarAndNavigationBar = 64.0;
 30     //添加网页控件
 31     _webView = [[UIWebView alloc] initWithFrame:CGRectMake(0.0, heightOfStatusBarAndNavigationBar,
 32                                                            rect.size.width, rect.size.height - heightOfStatusBarAndNavigationBar)];
 33     _webView.dataDetectorTypes = UIDataDetectorTypeAll;
 34     _webView.delegate = self;
 35     self.automaticallyAdjustsScrollViewInsets = NO;
 36     [self.view addSubview:_webView];
 37 }
 38 
 39 - (void)sendRequest {
 40     NSString *htmlStr=@"<html> 41     <head><title>KenmuHuang‘s Blog</title></head> 42     <body style=\"color:#0044AA;\">\
 43     <h3 id=\"header\">I‘m KenmuHuang, click me to show action sheet.</h3>\
 44     <p>More coding, more thinking. Stay hungry, stay foolish.</p> 45     <span>http://www.cnblogs.com/huangjianwu/</span>\
 46     </body> 47     </html>";
 48     [_webView loadHTMLString:htmlStr baseURL:nil];
 49 }
 50 
 51 - (void)showActionSheetWithTitle:(NSString *)title cancelButtonTitle:(NSString *)cancelButtonTitle destructiveButtonTitle:(NSString *)destructiveButtonTitle otherButtonTitle:(NSString *)otherButtonTitle{
 52     UIActionSheet *actionSheet=[[UIActionSheet alloc] initWithTitle:title
 53                                                            delegate:nil
 54                                                   cancelButtonTitle:cancelButtonTitle
 55                                              destructiveButtonTitle:destructiveButtonTitle
 56                                                   otherButtonTitles:otherButtonTitle, nil];
 57     [actionSheet showInView:self.view];
 58 }
 59 
 60 #pragma mark - UIWebViewDelegate
 61 - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
 62     BOOL isStartLoad = YES;
 63     if ([request.URL.scheme isEqualToString:@"kmactionsheet"]) { //request.URL.scheme 返回全小写的内容
 64         NSString *paramContent = request.URL.query;
 65         NSArray *arrParam = [[paramContent stringByRemovingPercentEncoding] componentsSeparatedByString:@"&"];
 66         NSString *otherButtonTitle = nil;
 67         if (arrParam.count > 3) {
 68             otherButtonTitle = arrParam[3];
 69         }
 70         
 71         [self showActionSheetWithTitle:arrParam[0]
 72                      cancelButtonTitle:arrParam[1]
 73                 destructiveButtonTitle:arrParam[2]
 74                       otherButtonTitle:otherButtonTitle];
 75         isStartLoad = NO;
 76     }
 77     return isStartLoad;
 78 }
 79 
 80 - (void)webViewDidStartLoad:(UIWebView *)webView {
 81     kApplication.networkActivityIndicatorVisible = YES;
 82 }
 83 
 84 - (void)webViewDidFinishLoad:(UIWebView *)webView {
 85     kApplication.networkActivityIndicatorVisible = NO;
 86     
 87     //加载用于重定向地址的JavaScript内容
 88     NSString *jsPath = [[NSBundle mainBundle] pathForResource:@"RedirectURL.js" ofType:nil];
 89     NSString *jsContent = [NSString stringWithContentsOfFile:jsPath
 90                                                     encoding:NSUTF8StringEncoding
 91                                                        error:nil];
 92     [_webView stringByEvaluatingJavaScriptFromString:jsContent];
 93 }
 94 
 95 - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
 96     NSLog(@"Error: %@", error);
 97     kApplication.networkActivityIndicatorVisible = NO;
 98     UIAlertView *alertVCustom = [[UIAlertView alloc] initWithTitle:@"提示信息"
 99                                                            message:@"网络连接错误"
100                                                           delegate:nil
101                                                  cancelButtonTitle:@"确定"
102                                                  otherButtonTitles:nil, nil];
103     [alertVCustom show];
104 }
105 
106 @end 

1 #import <UIKit/UIKit.h>
2 
3 @interface AppDelegate : UIResponder <UIApplicationDelegate>
4 
5 @property (strong, nonatomic) UIWindow *window;
6 @property (strong, nonatomic) UINavigationController *navigationController;
7 
8 @end 

 1 #import "AppDelegate.h"
 2 #import "ViewController.h"
 3 
 4 @interface AppDelegate ()
 5 
 6 @end
 7 
 8 @implementation AppDelegate
 9 
10 
11 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
12     _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
13     ViewController *viewController = [[ViewController alloc]
14                                       initWithSampleNameArray:@[ kTitleOfSimpleBrowser,
15                                                                  kTitleOfPageInteraction,
16                                                                  kTitleOfPageCallOCFunction ]];
17     _navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
18     _window.rootViewController = _navigationController;
19     //[_window addSubview:_navigationController.view]; //当_window.rootViewController关联时，这一句可有可无
20     [_window makeKeyAndVisible];
21     return YES;
22 }
23 
24 - (void)applicationWillResignActive:(UIApplication *)application {
25 }
26 
27 - (void)applicationDidEnterBackground:(UIApplication *)application {
28 }
29 
30 - (void)applicationWillEnterForeground:(UIApplication *)application {
31 }
32 
33 - (void)applicationDidBecomeActive:(UIApplication *)application {
34 }
35 
36 - (void)applicationWillTerminate:(UIApplication *)application {
37 }
38 
39 @end