IOS UIWebView (API+JS交互)、WKWebView
javascriptCore.framework
使用如下代码可以等比缩放webview的网页大小，以便适配手机大小，0.5表示缩小为原网页1/2大小：
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
[webView stringByEvaluatingJavaScriptFromString:@"document.body.style.zoom=0.5"];
}
webView上下文
JSContext *context = [self.webview valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
（1）获取页面title
NSString *title = [webview stringByEvaluatingJavaScriptFromString:@"document.title"];
（2）获取当前的URL
NSString *url = [webview stringByEvaluatingJavaScriptFromString:@"document.location.href"];WebView Post 请求 H5
NSURL *url = [NSURL URLWithString:self.url];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL: url];
[request setHTTPMethod: @"POST"];
[request setHTTPBody: [self.body dataUsingEncoding: NSUTF8StringEncoding]];
[self.webView loadRequest: request];WebView使用
webView = [[UIWebView alloc]initWithFrame:CGRectMake(0, 100, CGRectGetWidth(self.view.frame), 500)];
webView.delegate = self;
[self.view addSubview:webView];
//设置URL请求
NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//请求事件
[webView loadRequest:request];
//@property (nonatomic) BOOL scalesPageToFit;
//自动适配屏幕
webView.scalesPageToFit = YES;
//禁止反弹
[(UIScrollView *)[[webView subviews] objectAtIndex:0] setBounces:NO];
//@property (nonatomic) UIDataDetectorTypes dataDetectorTypes NS_AVAILABLE_IOS(3_0);
/*
typedef NS_OPTIONS(NSUInteger, UIDataDetectorTypes) {
UIDataDetectorTypePhoneNumber = 1 << 0, // 默认 电话号码
UIDataDetectorTypeLink = 1 << 1, // URL
#if __IPHONE_4_0 <= __IPHONE_OS_VERSION_MAX_ALLOWED
UIDataDetectorTypeAddress = 1 << 2, // Email地址
UIDataDetectorTypeCalendarEvent = 1 << 3, // 日历 打开 ActionSheet
UIDataDetectorTypeNone = 0, // 无超链
UIDataDetectorTypeAll = NSUIntegerMax // All types
};
*/
webView.dataDetectorTypes = UIDataDetectorTypeAll;
//@property (nonatomic) BOOL allowsInlineMediaPlayback NS_AVAILABLE_IOS(4_0); // iPhone Safari defaults to NO. iPad Safari defaults to YES
//这个值决定了用内嵌HTML5播放视频还是用本地的全屏控制。（iPhone 默认关闭，iPad 默认打开）
webView.allowsInlineMediaPlayback = YES;
//@property (nonatomic) BOOL mediaPlaybackRequiresUserAction NS_AVAILABLE_IOS(4_0); // iPhone and iPad Safari both default to YES
//在iPhone和iPad上默认使YES。这个值决定了HTML5视频可以自动播放还是需要用户去启动播放
webView.mediaPlaybackRequiresUserAction = NO;
//@property (nonatomic) BOOL mediaPlaybackAllowsAirPlay NS_AVAILABLE_IOS(5_0); // iPhone and iPad Safari both default to YES
//这个值决定了从这个页面是否可以Air Play(蓝牙)。 在iPhone和iPad上默认使YES。
webView.mediaPlaybackAllowsAirPlay = YES;
//@property (nonatomic) BOOL suppressesIncrementalRendering NS_AVAILABLE_IOS(6_0); // iPhone and iPad Safari both default to NO
//是否网页内容下载完毕才开始渲染web视图，默认为NO
webView.suppressesIncrementalRendering = NO;
//@property (nonatomic) BOOL keyboardDisplayRequiresUserAction NS_AVAILABLE_IOS(6_0); // default is YES
//是否在web页面响应用户输入弹出键盘，默认为YES
webView.keyboardDisplayRequiresUserAction = YES;
//===================以下是io7新特性======================
//@property (nonatomic) UIWebPaginationMode paginationMode NS_AVAILABLE_IOS(7_0);
//设置此项属性网页会压缩展示,当网页的大小超出view时，以翻页的效果展示
/**
typedef NS_ENUM(NSInteger, UIWebPaginationMode) {
UIWebPaginationModeUnpaginated,//不使用翻页效果
UIWebPaginationModeLeftToRight,//将网页超出部分分页，从左向右进行翻页
UIWebPaginationModeTopToBottom,//将网页超出部分分页，从上向下进行翻页
UIWebPaginationModeBottomToTop,//将网页超出部分分页，从下向上进行翻页
UIWebPaginationModeRightToLeft//将网页超出部分分页，从右向左进行翻页
};
*/
webView.paginationMode = UIWebPaginationModeTopToBottom;
//@property (nonatomic) UIWebPaginationBreakingMode paginationBreakingMode NS_AVAILABLE_IOS(7_0);
//webView加载页面具有CSS属性时是使用页的样式还是以列的样式。
/**
typedef NS_ENUM(NSInteger, UIWebPaginationBreakingMode) {
UIWebPaginationBreakingModePage,
UIWebPaginationBreakingModeColumn
};
*/
webView.paginationBreakingMode = UIWebPaginationBreakingModeColumn;
//@property (nonatomic) CGFloat pageLength NS_AVAILABLE_IOS(7_0);
//分页的长度
webView.pageLength = 50;
//@property (nonatomic) CGFloat gapBetweenPages NS_AVAILABLE_IOS(7_0);
//页面之间间距
webView.gapBetweenPages = 1;
//@property (nonatomic, readonly) NSUInteger pageCount NS_AVAILABLE_IOS(7_0);
//分页数
NSUInteger count = webView.pageCount;取消侧边和底部滚动条
UIWebView * d_intro = [[UIWebView alloc] init];
d_intro.delegate = self;
d_intro.dataDetectorTypes = UIDataDetectorTypeLink;
//取消右侧，下侧滚动条，去处上下滚动边界的黑色背景
d_intro.backgroundColor=[UIColor clearColor];
for (UIView *_aView in [d_intro subviews]) {
if ([_aView isKindOfClass:[UIScrollView class]]) {
[(UIScrollView *)_aView setShowsVerticalScrollIndicator:NO]; //右侧的滚动条 [(UIScrollView *)_aView setShowsHorizontalScrollIndicator:NO]; //下侧的滚动条 for (UIView *_inScrollview in _aView.subviews)
{
if ([_inScrollview isKindOfClass:[UIImageView class]])
{
_inScrollview.hidden = YES; //上下滚动出边界时的黑色的图片
}
}
}
} [self.view addSubview:d_intro];
JS调用OC方法
转自:http://www.2cto.com/kf/201503/383795.html
一、以前使用js调用object-c的方法
关于如何使用javascript调用object-c中的函数和方法，我搜索了好久
网上所有的方法，基本都指明了一个方向，那就是在UIWebview中载入的js代码中
通过改变document.locations=“”,然后回调UIWebview的
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
函数，在上面这个函数中，通过截取NSURLRequest解析js中传递过来的参数，再根据参数
来选择早已定义好的方法。
有没有别的方法呢？ 我找了几个月，没找到！但是有一个转机。
我偶然知道了 javascriptCore.framework 这个库
于是事情有了转机。
二、在js中直接调用oc的方法
废话不多说，现在看看如何在UIWebView的javascript中调用oc的方法
首先在建立一个UIWebView，代码如下：
//
// webview.m
// login
//
// Created by wangdan on 15-3-19.
// Copyright (c) 2015年 wangdan. All rights reserved.
//
#import "webview.h"
#import
@implementation webview
-(id)initWithFrame:(CGRect)frame
{
self=[super initWithFrame:frame];
if( self ){
self.webview=[[UIWebView alloc]initWithFrame:CGRectMake(0, 310, self.bounds.size.width, 300)];
self.webview.backgroundColor=[UIColor lightGrayColor];
NSString *htmlPath=[[NSBundle mainBundle] resourcePath];
htmlPath=[htmlPath stringByAppendingPathComponent:@"html/index.html"];
NSURL *localURL=[[NSURL alloc]initFileURLWithPath:htmlPath];
[self.webview loadRequest:[NSURLRequest requestWithURL:localURL]];
[self addSubview:self.webview];
JSContext *context = [self.webview valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
context[@"log"] = ^() {
NSLog(@"+++++++Begin Log+++++++");
NSArray *args = [JSContext currentArguments];
for (JSValue *jsVal in args) {
NSLog(@"%@", jsVal);
}
JSValue *this = [JSContext currentThis];
NSLog(@"this: %@",this);
NSLog(@"-------End Log-------");
};
// [context evaluateScript:@"log('ider', [7, 21], { hello:'world', js:100 });"];
}
return self;
}
@end
(1)在上述代码中，使用javascriptCore.framework，首先使用UIWebview加载一个静态网页，并
使用
JSContext *context = [self.webview valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
获取该UIWebview的javascript执行环境。
(2)在该javascript执行环境中，定义一个js函数，注意关键点来了
这个函数的执行体完全是 objective-c代码写的，也就是下面：
context[@"jakilllog"] = ^() {
NSLog(@"Begin Log");
NSArray *args = [JSContext currentArguments];
for (JSValue *jsVal in args) {
NSLog(@"%@", jsVal);
}
JSValue *this = [JSContext currentThis];
NSLog(@"-------End Log-------");
};
（3）试想一下，在定义的webview中，如果使用js执行log这个函数，那么会不会调用上面oc中block段代码呢，答案是肯定的！
下面看看UIWebView 中所加载的 html及其js代码是如何写的
（4）index.html代码
点击button
上面html定义了一个button，然后引用index.js，点击button的响应函数为buttonClick()该函数在index.js中定义，如下function buttonClick()
{
jakilllog("hello world");
}
意思是点击这个button，就调用jakilllog()函数，jakilllog()函数显然是我们在oc中实现的一个block段，
就是上述绿色部分的block段。
点击button会执行么？答案是肯定的。
下面上图
下图是执行的结果
UIWebView登陆需要记住用户名和密码下次自动登陆。(iOS UIWebView 通过 cookie 完成自动登录。)
现在我有个APP是嵌入的webView 登陆需要记住用户名和密码下次自动登陆，求大神看看如何实现？谢谢
目前这个问题我已经解决了，希望有用到的朋友来这里看http://www.jianshu.com/p/7b7fb2c9c780：给颗心
另我把代码写到这里一份也：
1、在UIWebView的代理方法中实现获取cookies并将cookies放到NSUserDefaults保存起来
-
(void)webViewDidFinishLoad:(UIWebView*)webView{
NSArray*nCookies = [[NSHTTPCookieStoragesharedHTTPCookieStorage]cookies];
NSHTTPCookie*cookie;
for(idcinnCookies)
{
if([cisKindOfClass:[NSHTTPCookieclass]])
{
cookie=(NSHTTPCookie*)c;
if([cookie.nameisEqualToString:@"PHPSESSID"]) {
NSNumber*sessionOnly = [NSNumbernumberWithBool:cookie.sessionOnly];
NSNumber*isSecure = [NSNumbernumberWithBool:cookie.isSecure];
NSArray*cookies = [NSArrayarrayWithObjects:cookie.name, cookie.value, sessionOnly, cookie.domain, cookie.path, isSecure,nil];
[[NSUserDefaultsstandardUserDefaults]setObject:cookiesforKey:@"cookies"];
break;
}
}
}
}
2、获取cookies：运行之后，UIWebview加载url之前获取保存好的cookies，并设置cookies，
NSArray*cookies =[[NSUserDefaultsstandardUserDefaults]objectForKey:@"cookies"];
NSMutableDictionary*cookieProperties = [NSMutableDictionarydictionary];
[cookiePropertiessetObject:[cookiesobjectAtIndex:0]forKey:NSHTTPCookieName];
[cookiePropertiessetObject:[cookiesobjectAtIndex:1]forKey:NSHTTPCookieValue];
[cookiePropertiessetObject:[cookiesobjectAtIndex:3]forKey:NSHTTPCookieDomain];
[cookiePropertiessetObject:[cookiesobjectAtIndex:4]forKey:NSHTTPCookiePath];
NSHTTPCookie*cookieuser = [NSHTTPCookiecookieWithProperties:cookieProperties];
[[NSHTTPCookieStoragesharedHTTPCookieStorage]setCookie:cookieuser];
注意：要在[self.webView loadRequest:req];之前设置获取cookies！
webview=[[UIWebView alloc]init];
webview.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
webview.scalesPageToFit=YES;
webview.multipleTouchEnabled=YES;
webview.userInteractionEnabled=YES;
uiwebview设置超时的问题
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:URL]
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
timeoutInterval:60];
[webview loadRequest:request];
-(void)refresh:(id)sender{
NSLog(@"in refresh");
if (self.webView.loading) {
[self.webView stopLoading];
}
//发生错误时则重新加载主页
if (hasError) {
[self.webView loadRequest:mainRequest];
}else{
[self.webView reload];
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
[self activeBtns];
mainRequest.URL = request.URL;
}
}
用NSURLCache解决UIWebView请求远程资源慢的问题
WebView 如何通过js获取网页中所有图片并加入点击事件，实现浏览图片的功能
转自:http://blog.csdn.net/u014544904/article/details/50479083
在网页加载完成时，通过js获取图片和添加点击的识别方式
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[IDProgressHUD IDPlaceViewHideDirect:self.view];
//这里是js，主要目的实现对url的获取
static NSString * const jsGetImages =
@"function getImages(){\
var objs = document.getElementsByTagName(\"img\");\
var imgScr = '';\
for(var i=0;i imgScr = imgScr + objs[i].src + '+';\ };\ return imgScr;\ };"; [webView stringByEvaluatingJavaScriptFromString:jsGetImages];//注入js方法 NSString *urlResurlt = [webView stringByEvaluatingJavaScriptFromString:@"getImages()"]; mUrlArray = [NSMutableArray arrayWithArray:[urlResurlt componentsSeparatedByString:@"+"]]; if (mUrlArray.count >= 2) { [mUrlArray removeLastObject]; } //urlResurlt 就是获取到得所有图片的url的拼接；mUrlArray就是所有Url的数组 //添加图片可点击js [mWebView stringByEvaluatingJavaScriptFromString:@"function registerImageClickAction(){\ var imgs=document.getElementsByTagName('img');\ var length=imgs.length;\ for(var i=0;i img=imgs[i];\ img.οnclick=function(){\ window.location.href='image-preview:'+this.src}\ }\ }"]; [mWebView stringByEvaluatingJavaScriptFromString:@"registerImageClickAction();"]; } //在这个方法中捕获到图片的点击事件和被点击图片的url - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType { //预览图片 if ([request.URL.scheme isEqualToString:@"image-preview"]) { NSString* path = [request.URL.absoluteString substringFromIndex:[@"image-preview:" length]]; path = [path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; //path 就是被点击图片的url return NO; } return YES; } Cookies 通常添加Token给Web、UIWebView和WKWebView的添加方法(第一种用PHP测试和本地不成功，最后只能Request时候修改) 参考:http://blog.csdn.net/qq_30513483/article/details/51798692
+(void)userAgent
{
//修改app默认UA
@autoreleasepool {
UIWebView* tempWebView = [[UIWebView alloc] initWithFrame:CGRectZero];
NSString* userAgent = [tempWebView stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];
// NSLog(@"------%@",userAgent);
NSString *executableFile =@"mplay";
NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString *)kCFBundleVersionKey];
NSString *ua = [NSString stringWithFormat:@"%@ %@/%@",
userAgent,
executableFile,version];
// NSLog(@"------%@",ua);
[[NSUserDefaults standardUserDefaults] registerDefaults:@{@"UserAgent" : ua, @"User-Agent" : ua}];
#if !__has_feature(objc_arc)
[tempWebView release];
#endif
}
}