iOS网络3—UIWebView与WKWebView使用详解

时间:2022-09-11 21:40:44

一、整体介绍

UIWebView自iOS2就有,WKWebView从iOS8才有,毫无疑问WKWebView将逐步取代笨重的UIWebView。通过简单的测试即可发现UIWebView占用过多内存,且内存峰值更是夸张。WKWebView网页加载速度也有提升,但是并不像内存那样提升那么多。下面列举一些其它的优势:

  • 更多的支持HTML5的特性
  • 官方宣称的高达60fps的滚动刷新率以及内置手势
  • Safari相同的JavaScript引擎
  • 将UIWebViewDelegate与UIWebView拆分成了14类与3个协议(官方文档说明)
  • 另外用的比较多的,增加加载进度属性:estimatedProgress

二、UIWebView使用说明

1 举例:简单的使用

UIWebView使用非常简单,可以分为三步,也是最简单的用法,显示网页

- (void)simpleExampleTest {
// 1.创建webview,并设置大小,"20"为状态栏高度
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height - )];
// 2.创建请求
NSMutableURLRequest *request =[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.cnblogs.com/mddblog/"]];
// 3.加载网页
[webView loadRequest:request]; // 最后将webView添加到界面
[self.view addSubview:webView];
}

2 一些实用函数

  • 加载函数。
- (void)loadRequest:(NSURLRequest *)request;
- (void)loadHTMLString:(NSString *)string baseURL:(nullable NSURL *)baseURL;
- (void)loadData:(NSData *)data MIMEType:(NSString *)MIMEType textEncodingName:(NSString *)textEncodingName baseURL:(NSURL *)baseURL;

UIWebView不仅可以加载HTML页面,还支持pdf、word、txt、各种图片等等的显示。下面以加载mac桌面上的png图片:/Users/coohua/Desktop/bigIcon.png为例

// 1.获取url
NSURL *url = [NSURL fileURLWithPath:@"/Users/coohua/Desktop/bigIcon.png"];
// 2.创建请求
NSURLRequest *request=[NSURLRequest requestWithURL:url];
// 3.加载请求
[self.webView loadRequest:request];
  • 网页导航刷新有关函数
// 刷新
- (void)reload;
// 停止加载
- (void)stopLoading;
// 后退函数
- (void)goBack;
// 前进函数
- (void)goForward;
// 是否可以后退
@property (nonatomic, readonly, getter=canGoBack) BOOL canGoBack;
// 是否可以向前
@property (nonatomic, readonly, getter=canGoForward) BOOL canGoForward;
// 是否正在加载
@property (nonatomic, readonly, getter=isLoading) BOOL loading;

3 代理协议使用:UIWebViewDelegate

一共有四个方法

/// 是否允许加载网页,也可获取js要打开的url,通过截取此url可与js交互
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType { NSString *urlString = [[request URL] absoluteString];
urlString = [urlString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSArray *urlComps = [urlString componentsSeparatedByString:@"://"];
NSLog(@"urlString=%@---urlComps=%@",urlString,urlComps);
return YES;
}
/// 开始加载网页
- (void)webViewDidStartLoad:(UIWebView *)webView {
NSURLRequest *request = webView.request;
NSLog(@"webViewDidStartLoad-url=%@--%@",[request URL],[request HTTPBody]);
}
/// 网页加载完成
- (void)webViewDidFinishLoad:(UIWebView *)webView {
NSURLRequest *request = webView.request;
NSURL *url = [request URL];
if ([url.path isEqualToString:@"/normal.html"]) {
NSLog(@"isEqualToString");
}
NSLog(@"webViewDidFinishLoad-url=%@--%@",[request URL],[request HTTPBody]);
NSLog(@"%@",[self.webView stringByEvaluatingJavaScriptFromString:@"document.title"]);
}
/// 网页加载错误
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
NSURLRequest *request = webView.request;
NSLog(@"didFailLoadWithError-url=%@--%@",[request URL],[request HTTPBody]); }

4 与js交互

主要有两方面:js执行OC代码、oc调取写好的js代码

  • js执行OC代码:js是不能执行oc代码的,但是可以变相的执行,js可以将要执行的操作封装到网络请求里面,然后oc拦截这个请求,获取url里面的字符串解析即可,这里用到代理协议的- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType函数。
  • oc调取写好的js代码:这里用到UIwebview的一个方法。示例代码一个是网页定位,一个是获取网页title:
// 实现自动定位js代码, htmlLocationID为定位的位置(由js开发人员给出),实现自动定位代码,应该在网页加载完成之后再调用
NSString *javascriptStr = [NSString stringWithFormat:@"window.location.href = '#%@'",htmlLocationID];
// webview执行代码
[self.webView stringByEvaluatingJavaScriptFromString:javascriptStr]; // 获取网页的title
NSString *title = [self.webView stringByEvaluatingJavaScriptFromString:@"document.title"];
  • 与js交互的实例

很多时候,我们要对网页做一些编辑,比如加载一个网页后,个别原因,我们不想显示新闻的来源,如下图的新闻来源“新华网”,网页的链接如下:http://op.inews.qq.com/mcms/h5/default/detail?id=NEW2016103101306200&refer=100000050(可能已经失效)

iOS网络3—UIWebView与WKWebView使用详解

那我们就可以使用js代码将这个标签去掉,且只留下时间。js代码的编写,根据火狐浏览器查看它的标签名称,然后做处理,如上图,具体代码如下:

- (void)deleteNewsSource {
// 1.去掉页面标题
NSMutableString *str = [NSMutableString string];
// 去掉导航页,如果想把“腾讯新闻”导航栏一并去掉,就打开注释
// [str appendString:@"document.getElementsByClassName('g-header')[0].style.display = 'none';"];
// 来源
[str appendString:@"if(document.getElementsByClassName('g-wrapper-author')[0].innerHTML.indexOf(' ') == -1){document.getElementsByClassName('g-wrapper-author')[0].innerHTML = document.getElementsByClassName('g-wrapper-author')[0].innerHTML}else{document.getElementsByClassName('g-wrapper-author')[0].innerHTML = document.getElementsByClassName('g-wrapper-author')[0].innerHTML.split(' ')[1];}"];
// 执行js代码
[_webView stringByEvaluatingJavaScriptFromString:str];
}

代码执行的时机,一般情况下是等待网页加载完成- (void)webViewDidFinishLoad:(UIWebView *)webView里面执行,比较合理,但是有延迟,我们会发现刚开始有来源,然后突然又没有了,即js代码执行有延迟。

这样的话,我们可以在- (void)webViewDidStartLoad:(UIWebView *)webView网页开始加载里面开启一个定时器,比如定时0.2秒(根据需要自己设定),在定时器里面不停的调用- (void)deleteNewsSource方法即可解决。然后在- (void)webViewDidFinishLoad:(UIWebView *)webView里面关掉定时器。另外定时器容易引起循环引用,一定要注意释放。比如可以在viewDidDisappear方法里释放定时器。。。

- (void)webViewDidStartLoad:(UIWebView *)webView {
// 1.去掉页面来源标签,时间根据需要自己设置,定时器在这里开启具有一定危险性
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(deleteNewsSource) userInfo:nil repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
self.timer = timer;
}

三、WKWebView使用说明

1 简单使用

与UIWebview一样,仅需三步:

- (void)simpleExampleTest {
// 1.创建webview,并设置大小,"20"为状态栏高度
WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height - )];
// 2.创建请求
NSMutableURLRequest *request =[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.cnblogs.com/mddblog/"]];
// 3.加载网页
[webView loadRequest:request]; // 最后将webView添加到界面
[self.view addSubview:webView];
}

2 一些实用函数

  • 加载网页函数
    相比UIWebview,WKWebView也支持各种文件格式,并新增了loadFileURL函数,顾名思义加载本地文件,不要用loadRequest来加载本地HTML,另外,加载网页显示属于UI,所以应在主线程里面执行加载网页函数,不过即使在其它线程执行了加载网页函数,也没关系,苹果已做了处理,保证UI在主线程更新。
/// 模拟器调试加载mac本地文件
- (void)loadLocalFile {
// 1.创建webview,并设置大小,"20"为状态栏高度
WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height - )];
// 2.创建url userName:电脑用户名
NSURL *url = [NSURL fileURLWithPath:@"/Users/userName/Desktop/bigIcon.png"];
// 3.加载文件
[webView loadFileURL:url allowingReadAccessToURL:url];
// 最后将webView添加到界面
[self.view addSubview:webView];
} /// 其它三个加载函数
- (WKNavigation *)loadRequest:(NSURLRequest *)request;
- (WKNavigation *)loadHTMLString:(NSString *)string baseURL:(nullable NSURL *)baseURL;
- (WKNavigation *)loadData:(NSData *)data MIMEType:(NSString *)MIMEType characterEncodingName:(NSString *)characterEncodingName baseURL:(NSURL *)baseURL;
  • 网页导航刷新相关函数
    和UIWebview几乎一样,不同的是有返回值,WKNavigation(已更新),另外增加了函数reloadFromOrigingoToBackForwardListItem
    • reloadFromOrigin会比较网络数据是否有变化,没有变化则使用缓存,否则从新请求。
    • goToBackForwardListItem:比向前向后更强大,可以跳转到某个指定历史页面
@property (nonatomic, readonly) BOOL canGoBack;
@property (nonatomic, readonly) BOOL canGoForward;
- (WKNavigation *)goBack;
- (WKNavigation *)goForward;
- (WKNavigation *)reload;
- (WKNavigation *)reloadFromOrigin; // 增加的函数
- (WKNavigation *)goToBackForwardListItem:(WKBackForwardListItem *)item; // 增加的函数
- (void)stopLoading;
  • 一些常用属性
    • allowsBackForwardNavigationGestures:BOOL类型,是否允许左右划手势导航,默认不允许
    • estimatedProgress:加载进度,取值范围0~1
    • title:页面title
    • .scrollView.scrollEnabled:是否允许上下滚动,默认允许
    • backForwardList:WKBackForwardList类型,访问历史列表,可以通过前进后退按钮访问,或者通过goToBackForwardListItem函数跳到指定页面
  • 执行js代码

/// jsStr为要执行的js代码,字符串形式
[webView evaluateJavaScript:jsStr completionHandler:^(id item, NSError * _Nullable error) {
// 执行结果回调
}];

3 代理协议使用

一共有三个代理协议:

  • WKNavigationDelegate:最常用,和UIWebViewDelegate功能类似,追踪加载过程,有是否允许加载、开始加载、加载完成、加载失败。下面会对函数做简单的说明,并用数字标出调用的先后次序:1-2-3-4-5

三个是否允许加载函数:

/// 接收到服务器跳转请求之后调用 (服务器端redirect),不一定调用
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation;
/// 3 在收到服务器的响应头,根据response相关信息,决定是否跳转。decisionHandler必须调用,来决定是否跳转,参数WKNavigationActionPolicyCancel取消跳转,WKNavigationActionPolicyAllow允许跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler;
/// 1 在发送请求之前,决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler;

追踪加载过程函数:

/// 2 页面开始加载
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation;
/// 4 开始获取到网页内容时返回
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation;
/// 5 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation;
/// 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation;
  • WKScriptMessageHandler:必须实现的函数,是APP与js交互,提供从网页中收消息的回调方法,即js可以调用app的方法

当然需要对webview做一些特殊处理,创建的时候调用initWithFrame:configuration:做一些配置,configurationWKWebViewConfiguration类型,具体不再详述,代理方法如下:

/// message: 收到的脚本信息.
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message;
当然,app也可以执行js代码,如下:
/// jsStr为要执行的js代码,字符串形式
[webView evaluateJavaScript:jsStr completionHandler:^(id item, NSError * _Nullable error) {
// 执行结果回调
}];
  • WKUIDelegate:UI界面相关,原生控件支持,三种提示框:输入、确认、警告。首先将web提示框拦截然后再做处理。
/// 创建一个新的WebView
- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures;
/// 输入框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler;
/// 确认框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler;
/// 警告框
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler;

四、示例代码

  • 代码可以实现一般网络显示,加载本地文件(pdf、word、txt、图片等等)
  • 搜索框搜索界面,搜索框输入file://则加载本地文件,http://则加载网络内容,如果两者都不是则搜索输入的关键字。
  • 下部网络导航,后退、前进、刷新、用Safari打开链接四个按钮

iOS网络3—UIWebView与WKWebView使用详解

iOS网络3—UIWebView与WKWebView使用详解

/// 控件高度
#define kSearchBarH 44
#define kBottomViewH 44 /// 屏幕大小尺寸
#define kScreenWidth [UIScreen mainScreen].bounds.size.width
#define kScreenHeight [UIScreen mainScreen].bounds.size.height #import "ViewController.h"
#import <WebKit/WebKit.h> @interface ViewController () <UISearchBarDelegate, WKNavigationDelegate> @property (nonatomic, strong) UISearchBar *searchBar;
/// 网页控制导航栏
@property (weak, nonatomic) UIView *bottomView; @property (nonatomic, strong) WKWebView *wkWebView; @property (weak, nonatomic) UIButton *backBtn;
@property (weak, nonatomic) UIButton *forwardBtn;
@property (weak, nonatomic) UIButton *reloadBtn;
@property (weak, nonatomic) UIButton *browserBtn; @property (weak, nonatomic) NSString *baseURLString; @end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad];
// [self simpleExampleTest]; [self addSubViews];
[self refreshBottomButtonState]; [self.wkWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.cnblogs.com/mddblog/"]]]; }
- (void)simpleExampleTest {
// 1.创建webview,并设置大小,"20"为状态栏高度
WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height - )];
// 2.创建请求
NSMutableURLRequest *request =[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.cnblogs.com/mddblog/"]];
// // 3.加载网页
[webView loadRequest:request];
// [webView loadFileURL:[NSURL fileURLWithPath:@"/Users/userName/Desktop/bigIcon.png"] allowingReadAccessToURL:[NSURL fileURLWithPath:@"/Users/userName/Desktop/bigIcon.png"]];
// 最后将webView添加到界面
[self.view addSubview:webView];
}
/// 模拟器加载mac本地文件
- (void)loadLocalFile {
// 1.创建webview,并设置大小,"20"为状态栏高度
WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height - )];
// 2.创建url userName:电脑用户名
NSURL *url = [NSURL fileURLWithPath:@"/Users/userName/Desktop/bigIcon.png"];
// 3.加载文件
[webView loadFileURL:url allowingReadAccessToURL:url];
// 最后将webView添加到界面
[self.view addSubview:webView];
}
- (void)addSubViews {
[self addBottomViewButtons]; [self.view addSubview:self.searchBar]; [self.view addSubview:self.wkWebView];
} - (void)addBottomViewButtons {
// 记录按钮个数
int count = ;
// 添加按钮
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:@"后退" forState:UIControlStateNormal];
[button setTitleColor:[UIColor colorWithRed: / 255.0 green: / 255.0 blue: / 255.0 alpha:1.0] forState:UIControlStateNormal];
[button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateHighlighted];
[button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateDisabled];
[button.titleLabel setFont:[UIFont systemFontOfSize:]];
button.tag = ++count; // 标记按钮
[button addTarget:self action:@selector(onBottomButtonsClicled:) forControlEvents:UIControlEventTouchUpInside];
[self.bottomView addSubview:button];
self.backBtn = button; button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:@"前进" forState:UIControlStateNormal];
[button setTitleColor:[UIColor colorWithRed: / 255.0 green: / 255.0 blue: / 255.0 alpha:1.0] forState:UIControlStateNormal];
[button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateHighlighted];
[button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateDisabled];
[button.titleLabel setFont:[UIFont systemFontOfSize:]];
button.tag = ++count;
[button addTarget:self action:@selector(onBottomButtonsClicled:) forControlEvents:UIControlEventTouchUpInside];
[self.bottomView addSubview:button];
self.forwardBtn = button; button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:@"重新加载" forState:UIControlStateNormal];
[button setTitleColor:[UIColor colorWithRed: / 255.0 green: / 255.0 blue: / 255.0 alpha:1.0] forState:UIControlStateNormal];
[button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateHighlighted];
[button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateDisabled];
[button.titleLabel setFont:[UIFont systemFontOfSize:]];
button.tag = ++count;
[button addTarget:self action:@selector(onBottomButtonsClicled:) forControlEvents:UIControlEventTouchUpInside];
[self.bottomView addSubview:button];
self.reloadBtn = button; button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:@"Safari" forState:UIControlStateNormal];
[button setTitleColor:[UIColor colorWithRed: / 255.0 green: / 255.0 blue: / 255.0 alpha:1.0] forState:UIControlStateNormal];
[button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateHighlighted];
[button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateDisabled];
[button.titleLabel setFont:[UIFont systemFontOfSize:]];
button.tag = ++count;
[button addTarget:self action:@selector(onBottomButtonsClicled:) forControlEvents:UIControlEventTouchUpInside];
[self.bottomView addSubview:button];
self.browserBtn = button;
// 统一设置frame
[self setupBottomViewLayout];
}
- (void)setupBottomViewLayout
{
int count = ;
CGFloat btnW = ;
CGFloat btnH = ; CGFloat btnY = (self.bottomView.bounds.size.height - btnH) / ;
// 按钮间间隙
CGFloat margin = (self.bottomView.bounds.size.width - btnW * count) / count; CGFloat btnX = margin * 0.5;
self.backBtn.frame = CGRectMake(btnX, btnY, btnW, btnH); btnX = self.backBtn.frame.origin.x + btnW + margin;
self.forwardBtn.frame = CGRectMake(btnX, btnY, btnW, btnH); btnX = self.forwardBtn.frame.origin.x + btnW + margin;
self.reloadBtn.frame = CGRectMake(btnX, btnY, btnW, btnH); btnX = self.reloadBtn.frame.origin.x + btnW + margin;
self.browserBtn.frame = CGRectMake(btnX, btnY, btnW, btnH);
}
/// 刷新按钮是否允许点击
- (void)refreshBottomButtonState {
if ([self.wkWebView canGoBack]) {
self.backBtn.enabled = YES;
} else {
self.backBtn.enabled = NO;
} if ([self.wkWebView canGoForward]) {
self.forwardBtn.enabled = YES;
} else {
self.forwardBtn.enabled = NO;
}
}
/// 按钮点击事件
- (void)onBottomButtonsClicled:(UIButton *)sender {
switch (sender.tag) {
case :
{
[self.wkWebView goBack];
[self refreshBottomButtonState];
}
break;
case :
{
[self.wkWebView goForward];
[self refreshBottomButtonState];
}
break;
case :
[self.wkWebView reload];
break;
case :
[[UIApplication sharedApplication] openURL:self.wkWebView.URL];
break;
default:
break;
}
} #pragma mark - WKWebView WKNavigationDelegate 相关
/// 是否允许加载网页 在发送请求之前,决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler { NSString *urlString = [[navigationAction.request URL] absoluteString]; urlString = [urlString stringByRemovingPercentEncoding];
// NSLog(@"urlString=%@",urlString);
// 用://截取字符串
NSArray *urlComps = [urlString componentsSeparatedByString:@"://"];
if ([urlComps count]) {
// 获取协议头
NSString *protocolHead = [urlComps objectAtIndex:];
NSLog(@"protocolHead=%@",protocolHead);
}
decisionHandler(WKNavigationActionPolicyAllow);
} #pragma mark - searchBar代理方法
/// 点击搜索按钮
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
// 创建url
NSURL *url = nil;
NSString *urlStr = searchBar.text; // 如果file://则为打开bundle本地文件,http则为网站,否则只是一般搜索关键字
if([urlStr hasPrefix:@"file://"]){
NSRange range = [urlStr rangeOfString:@"file://"];
NSString *fileName = [urlStr substringFromIndex:range.length];
url = [[NSBundle mainBundle] URLForResource:fileName withExtension:nil];
// 如果是模拟器加载电脑上的文件,则用下面的代码
// url = [NSURL fileURLWithPath:fileName];
}else if(urlStr.length>){
if ([urlStr hasPrefix:@"http://"]) {
url=[NSURL URLWithString:urlStr];
} else {
urlStr=[NSString stringWithFormat:@"http://www.baidu.com/s?wd=%@",urlStr];
}
urlStr = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
url=[NSURL URLWithString:urlStr]; }
NSURLRequest *request=[NSURLRequest requestWithURL:url]; // 加载请求页面
[self.wkWebView loadRequest:request];
}
#pragma mark - 懒加载
- (UIView *)bottomView {
if (_bottomView == nil) {
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(, kScreenHeight - kBottomViewH, kScreenWidth, kBottomViewH)];
view.backgroundColor = [UIColor colorWithRed:/255.0 green:/255.0 blue:/255.0 alpha:];
[self.view addSubview:view];
_bottomView = view;
}
return _bottomView;
}
- (UISearchBar *)searchBar {
if (_searchBar == nil) {
UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(, , kScreenWidth, kSearchBarH)];
searchBar.delegate = self;
searchBar.text = @"http://www.cnblogs.com/mddblog/";
_searchBar = searchBar; }
return _searchBar;
} - (WKWebView *)wkWebView {
if (_wkWebView == nil) {
WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectMake(, + kSearchBarH, kScreenWidth, kScreenHeight - - kSearchBarH - kBottomViewH)];
webView.navigationDelegate = self;
// webView.scrollView.scrollEnabled = NO; // webView.backgroundColor = [UIColor colorWithPatternImage:self.image];
// 允许左右划手势导航,默认允许
webView.allowsBackForwardNavigationGestures = YES;
_wkWebView = webView;
} return _wkWebView;
} @end

五、github代码下载

UIWebView下载

WKWebView下载