QZWebView
WebView的简单封装 - 适用于原生App与h5交互
GitHub:https://github.com/quzhongyeluo/QZWebView
现在的新项目基本上都是最低适配iOS 8了，毕竟现在中国的社交巨无霸QQ和微信都是最低适配iOS 8，除非...老板特别要求的要适配iOS 7...无奈.，兼容iOS 7真的要花很多时间。最近在重构项目，现在简单说一下WebView的封装！适用于原生App与h5交互
iOS 7使用UIWebView
iOS 8及以上系统使用WKWebView（好处不说了，坑也不说了，网上一大把）
使用方法：
导入QZWebView.m QZWebView.h
如果需要控制器还需导入QZWebViewViewController.m QZWebViewViewController.h
QZWebView *webView = [[QZWebView alloc] initWithFrame:self.view.bounds url:yoururl];
[self.view addSubview:webView];
或者
QZWebView *webView = [[QZWebView alloc] initWithFrame:self.view.bounds filePath:self.filePath];
[self.view addSubview:webView];
使用控制器例子：
QZWebViewViewController *vc = [[QZWebViewViewController alloc] initWithURL:@"https://www.baidu.com"];
[self.navigationController pushViewController:vc animated:true];
本地初始化就不写例子了，涉及到公司的项目的信息
如果iOS 9及以上系统访问失败，请检查是否开启了http访问的权限。
自定义需要修改的地方：
1、本地html文件所在的文件位置
baseURL:本地html文件所在的文件夹
2、自定义的需要拦截的链接，进行与h5交互
WKWebView改：
/*
在发送请求之前，决定是否跳转
decisionHandler必须调用，来决定是否跳转，
WKNavigationActionPolicyCancel取消跳转
WKNavigationActionPolicyAllow 允许跳转
*/
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
// 如果 targetFrame 的 mainFrame 属性为NO，表明这个 WKNavigationAction 将会新开一个页面。
if (!navigationAction.targetFrame.isMainFrame) {
[webView evaluateJavaScript:@"var a = document.getElementsByTagName('a');for(var i=0;i<a.length;i++){a[i].setAttribute('target','');}" completionHandler:nil];
}
// 对截获的URL进行自定义操作
// 获取URL
NSString *urlString = [[navigationAction.request URL] absoluteString];
// 把URL转成UTF8编码
NSString *UTF8URL = [NSString stringWithString:[urlString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
if ([UTF8URL rangeOfString:@"自定义"].length != 0) {
// 被拦截，不允许跳转（进行自定义操作）
decisionHandler(WKNavigationActionPolicyCancel);
}else{
// 允许跳转
decisionHandler(WKNavigationActionPolicyAllow);
}
}
UIWebView改：
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
// 获取URL
NSString *urlString = [[request URL] absoluteString];
// 把URL转成UTF8编码
NSString *UTF8URL = [NSString stringWithString:[urlString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
if ([UTF8URL rangeOfString:@"自定义"].length != 0) {
// 被拦截，不允许跳转（进行自定义操作）
return NO;
}else{
// 允许跳转
return YES;
}
}
Github：https://github.com/quzhongyeluo/QZWebView
直接看代码吧！代码有详细的注释
QZWebView.h
//
// QZWebView.h
// QZWebView
//
// Created by 曲终叶落 on 2017/7/13.
// Copyright © 2017年 曲终叶落. All rights reserved.
//
#import <UIKit/UIKit.h>
@protocol QZWebViewDelegate <NSObject>
@optional
/**
页面开始加载时调用
*/
- (void)didStartProvisional;
/**
开始获取到网页内容时返回
*/
- (void)didCommit;
/**
加载完成
*/
- (void)didFinish;
/**
加载失败
*/
- (void)didFailProvisional;
- (void)scrollViewDidScroll:(UIScrollView *)scrollView;
- (void)scrollViewWillEndDragging;
- (void)webViewTitle:(NSString *)title;
@end
/**
WebView封装：
iOS7 : UIWebView
iOS8 : WKWebView
*/
@interface QZWebView : UIView
@property (nonatomic,weak) id<QZWebViewDelegate>deleget;
/**
通过网页链接初始化
@param frame frame
@param url 网页链接
@return webView
*/
- (instancetype)initWithFrame:(CGRect)frame url:(NSString *)url;
/**
通过本地链接初始化
@param frame frame
@param filePath 本地链接
@return webView
*/
- (instancetype)initWithFrame:(CGRect)frame filePath:(NSString *)filePath;
/**
加载JSON数据(需要在webView加载完成后使用)
@param json json数据
*/
- (void)loadingWithJSON:(NSString *)json;
@end
QZWebView.m
//
// QZWebView.m
// QZWebView
//
// Created by 曲终叶落 on 2017/7/13.
// Copyright © 2017年 曲终叶落. All rights reserved.
//
#import "QZWebView.h"
#import <WebKit/WebKit.h>
/*-------------------- 系统版本 --------------------*/
/**
iOS 7
*/
#define TARGET_iOS7 [[UIDevice currentDevice].systemVersion doubleValue] < 8.0 && [[UIDevice currentDevice].systemVersion doubleValue] >= 7.0
/**
iOS 8
*/
#define TARGET_iOS8 [[UIDevice currentDevice].systemVersion doubleValue] < 9.0 && [[UIDevice currentDevice].systemVersion doubleValue] >= 8.0
/**
iOS 8及iOS 8以后的系统
*/
#define TARGET_iOS8Later [[UIDevice currentDevice].systemVersion doubleValue] >= 8.0
/**
iOS 9及iOS9以后的系统
*/
#define TARGET_iOS9Later [[UIDevice currentDevice].systemVersion doubleValue] >= 9.0
// 加载模式
typedef enum{
// 在线
LoadRequest,
// 本地HTML
LoadHTML
}QZWebViewLoadType;
@interface QZWebView () <UIWebViewDelegate,UIActionSheetDelegate,WKNavigationDelegate,UIScrollViewDelegate,WKScriptMessageHandler,WKUIDelegate>
@property (nonatomic,strong) UIWebView *uiWebView;
@property (nonatomic,strong) WKWebView *wkWebView;
/**
加载模式
*/
@property (nonatomic, assign) QZWebViewLoadType loadType;
/**
URL：可能是本地链接、在线链接
*/
@property (nonatomic, copy ) NSURL *url;
@end
@implementation QZWebView
#pragma mark - 初始化
- (instancetype)initWithFrame:(CGRect)frame url:(NSString *)url{
if (self = [super initWithFrame:frame]) {
_url = [NSURL URLWithString:url];
_loadType = LoadRequest;
[self loadData];
}
return self;
}
- (instancetype)initWithFrame:(CGRect)frame filePath:(NSString *)filePath{
if (self = [super initWithFrame:frame]) {
_url = [NSURL fileURLWithPath:filePath];
_loadType = LoadHTML;
[self loadData];
}
return self;
}
/**
开始加载在线数据或者加载本地html文件
*/
- (void)loadData{
switch (_loadType) {
case LoadRequest:{
// 在线链接
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:_url];
if (TARGET_iOS8Later) {
[self.wkWebView loadRequest:request];
}else{
[self.uiWebView loadRequest:request];
}
}
break;
default:{
// 加载本地文件 ()
// 本地文件所在的文件夹位置
// NSString *baseURL = [[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:@"web"];
NSString *baseURL = @"";
// 获取本地html的信息
NSString *html = [NSString stringWithContentsOfURL:_url encoding:NSUTF8StringEncoding error:nil];
if (TARGET_iOS7) {
[self.uiWebView loadHTMLString:html baseURL:[NSURL fileURLWithPath:baseURL]];
}else if (TARGET_iOS9Later){
[self.wkWebView loadHTMLString:html baseURL:[NSURL fileURLWithPath:baseURL]];
}else{
/*
在iOS8系统中，WKWebView使用loadHTMLString会出现不加载CSS和JS的问题
应使用loadRequest加载
另外WKWebView在iOS 8是不能加载NSBundle、NSHomeDirectory等位置的文件，只能加载NSTemporaryDirectory的文件，所以需要把本地文件复制到NSTemporaryDirectory里面
*/
// [self copyWebToTemp];
// NSString *webpath = [NSTemporaryDirectory() stringByAppendingString:@"web"];
NSString *webpath = @"";
NSString *path = [NSString stringWithFormat:@"%@/%@",webpath,_url.lastPathComponent];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]];
[self.wkWebView loadRequest:request];
}
}
break;
}
}
#pragma mark - 处理json数据
/**
加载JSON数据(需要在webView加载完成后使用)
@param json json数据
*/
- (void)loadingWithJSON:(NSString *)json{
if (TARGET_iOS8Later) {
[self.wkWebView evaluateJavaScript:json completionHandler:^(id item, NSError * _Nullable error) {
// Block中处理是否通过了或者执行JS错误的代码
NSLog(@"%@",item);
NSLog(@"%@",error);
}];
}else{
[self.uiWebView stringByEvaluatingJavaScriptFromString:json];
}
}
#pragma mark - WKWebView代理
// 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigatio{
if ([self.deleget respondsToSelector:@selector(didStartProvisional)]) {
[self.deleget didStartProvisional];
}
}
// 开始获取到网页内容时返回
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation{
if ([self.deleget respondsToSelector:@selector(didCommit)]) {
[self.deleget didCommit];
}
}
// 页面加载完成
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
if ([self.deleget respondsToSelector:@selector(didFinish)]) {
[self.deleget didFinish];
}
}
// 页面加载失败
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error{
if ([self.deleget respondsToSelector:@selector(didFailProvisional)]) {
[self.deleget didFailProvisional];
}
}
// 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{
}
/*
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，
WKNavigationResponsePolicyCancel取消跳转
WKNavigationResponsePolicyAllow 允许跳转
*/
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
decisionHandler(WKNavigationResponsePolicyAllow);
}
/*
在发送请求之前，决定是否跳转
decisionHandler必须调用，来决定是否跳转，
WKNavigationActionPolicyCancel取消跳转
WKNavigationActionPolicyAllow 允许跳转
*/
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
// 如果 targetFrame 的 mainFrame 属性为NO，表明这个 WKNavigationAction 将会新开一个页面。
if (!navigationAction.targetFrame.isMainFrame) {
[webView evaluateJavaScript:@"var a = document.getElementsByTagName('a');for(var i=0;i<a.length;i++){a[i].setAttribute('target','');}" completionHandler:nil];
}
// 对截获的URL进行自定义操作
// 获取URL
NSString *urlString = [[navigationAction.request URL] absoluteString];
// 把URL转成UTF8编码
NSString *UTF8URL = [NSString stringWithString:[urlString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
if ([UTF8URL rangeOfString:@"自定义"].length != 0) {
// 被拦截，不允许跳转（进行自定义操作）
decisionHandler(WKNavigationActionPolicyCancel);
}else{
// 允许跳转
decisionHandler(WKNavigationActionPolicyAllow);
}
}
// web界面中有弹出警告框时调用
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
NSLog(@"%@",message);
}
-(void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:([UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
completionHandler(NO);
}])];
[alertController addAction:([UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler(YES);
}])];
[[[[UIApplication sharedApplication] keyWindow] rootViewController] presentViewController:alertController animated:YES completion:nil];
}
// 从web界面中接收到一个脚本时调用
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
}
#pragma mark - UIWebView代理
// 开始加载
- (void)webViewDidStartLoad:(UIWebView *)webView{
if ([self.deleget respondsToSelector:@selector(didStartProvisional)]) {
[self.deleget didStartProvisional];
}
}
// 加载完成
- (void)webViewDidFinishLoad:(UIWebView *)webView{
if ([self.deleget respondsToSelector:@selector(didFinish)]) {
[self.deleget didFinish];
}
// 获取title
if ([self.deleget respondsToSelector:@selector(webViewTitle:)]) {
NSString *title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
[self.deleget webViewTitle:title];
}
}
// 加载失败
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{
if ([self.deleget respondsToSelector:@selector(didFailProvisional)]) {
[self.deleget didFailProvisional];
}
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
// 获取URL
NSString *urlString = [[request URL] absoluteString];
// 把URL转成UTF8编码
NSString *UTF8URL = [NSString stringWithString:[urlString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
if ([UTF8URL rangeOfString:@"自定义"].length != 0) {
// 被拦截，不允许跳转（进行自定义操作）
return NO;
}else{
// 允许跳转
return YES;
}
}
#pragma mark - scrollView代理
/**
* 解决iOS9系统bug
*
* 在iOS9系统中使用WKWebView时，滚动的时候缺少惯性，滚动幅度小，使用此方法可解决
*/
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
if ([[UIDevice currentDevice].systemVersion doubleValue] >= 9.0 && [[UIDevice currentDevice].systemVersion doubleValue] < 10.0) {
scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
}
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
if ([self.deleget respondsToSelector:@selector(scrollViewDidScroll:)]) {
[self.deleget scrollViewDidScroll:scrollView];
}
}
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset{
if ([self.deleget respondsToSelector:@selector(scrollViewWillEndDragging)]) {
[self.deleget scrollViewWillEndDragging];
}
}
#pragma mark - dealloc
- (void)dealloc{
if (TARGET_iOS8Later) {
// 不把wkWebView.scrollView.delegate 置为空在模拟器上会出现奔溃现象
self.wkWebView.scrollView.delegate = nil;
[self.wkWebView removeObserver:self forKeyPath:@"title"];
}else{
self.uiWebView.scrollView.delegate = nil;
}
[[NSNotificationCenter defaultCenter] removeObserver:self];
NSLog(@"webView已被释放");
}
#pragma mark - KVO
// 设置iOS 8及以上的标题
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if ([keyPath isEqualToString:@"title"])
{
if (object == self.wkWebView) {
// 此处可以获取到标题信息
NSLog(@"%@",self.wkWebView.title);
if ([self.deleget respondsToSelector:@selector(webViewTitle:)]) {
[self.deleget webViewTitle:self.wkWebView.title];
}
}else{
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
}
}else {
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
}
}
#pragma mark - get and set
- (UIWebView *)uiWebView{
if (!_uiWebView) {
UIWebView *web = [[UIWebView alloc] initWithFrame:self.bounds];
web.delegate = self;
// YES 加载网页中的电话号码，单击可以拨打
web.dataDetectorTypes = NO;
// 适应屏幕
web.scalesPageToFit = YES;
web.backgroundColor = [UIColor whiteColor];
web.multipleTouchEnabled = true;
web.scrollView.delegate = self;
web.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
[self addSubview:web];
_uiWebView = web;
}
return _uiWebView;
}
- (WKWebView *)wkWebView{
if (!_wkWebView) {
WKWebView *wkWebView = [[WKWebView alloc] initWithFrame:self.bounds];
wkWebView.UIDelegate = self;
wkWebView.navigationDelegate = self;
wkWebView.backgroundColor = [UIColor whiteColor];
/*! 解决iOS9.2以上黑边问题 */
wkWebView.opaque = false;
wkWebView.multipleTouchEnabled = true;
wkWebView.scrollView.delegate = self;
wkWebView.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
[wkWebView addObserver:self forKeyPath:@"title" options:NSKeyValueObservingOptionNew context:NULL];
[self addSubview:wkWebView];
_wkWebView = wkWebView;
}
return _wkWebView;
}
@end
WebView封装就完了，根据使用需求选择初始化方法。
为了方便使用顺便封装一个QZWebViewViewController：
QZWebViewViewController.h
//
// QZWebViewViewController.h
// QZWebView
//
// Created by 曲终叶落 on 2017/7/13.
// Copyright © 2017年 曲终叶落. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface QZWebViewViewController : UIViewController
/**
通过网页链接初始化
@param url 链接
@return return value description
*/
- (instancetype)initWithURL:(NSString *)url;
/**
通过本地文件初始化
@param filePath 本地文件位置
@return return value description
*/
- (instancetype)initWithFilePath:(NSString *)filePath;
@end
QZWebViewViewController.m
//
// QZWebViewViewController.m
// QZWebView
//
// Created by 曲终叶落 on 2017/7/13.
// Copyright © 2017年 曲终叶落. All rights reserved.
//
#import "QZWebViewViewController.h"
#import "QZWebView.h"
@interface QZWebViewViewController () <QZWebViewDelegate>
@property (nonatomic, copy ) NSString *url;
@property (nonatomic, strong) QZWebView *webView;
@property (nonatomic, copy ) NSString *filePath;
@property (nonatomic, strong) UIActivityIndicatorView *activityIndicatorView;
@end
@implementation QZWebViewViewController
#pragma mark - 初始化
- (instancetype)initWithURL:(NSString *)url{
if (self = [super init]) {
self.url = url;
}
return self;
}
- (instancetype)initWithFilePath:(NSString *)filePath{
if (self = [super init]) {
self.filePath = filePath;
}
return self;
}
#pragma mark -
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self webView];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - QZWebView代理
- (void)webViewTitle:(NSString *)title{
self.title = title;
}
/**
网页开始加载
*/
- (void)didStartProvisional{
[self.activityIndicatorView startAnimating];
}
/**
加载完成
*/
- (void)didFinish{
[self.activityIndicatorView stopAnimating];
}
#pragma mark - get and set
- (QZWebView *)webView{
if (!_webView) {
if (self.url) {
_webView = [[QZWebView alloc] initWithFrame:self.view.bounds url:self.url];
[self.view addSubview:_webView];
}else{
_webView = [[QZWebView alloc] initWithFrame:self.view.bounds filePath:self.filePath];
[self.view addSubview:_webView];
}
_webView.deleget = self;
}
return _webView;
}
- (UIActivityIndicatorView *)activityIndicatorView{
if (!_activityIndicatorView) {
_activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:(UIActivityIndicatorViewStyleWhiteLarge)];
_activityIndicatorView.frame = CGRectMake(0, 0, 100, 100);
_activityIndicatorView.center = CGPointMake(self.view.frame.size.width / 2, self.view.frame.size.height / 2);
_activityIndicatorView.color = [UIColor grayColor];
[self.view addSubview:_activityIndicatorView];
}
return _activityIndicatorView;
}
@end
