iOS UIWebView实现JS/html交互
2019-08-20 本文已影响0人
纵昂
一、导入JS头文件
#import <JavaScriptCore/JavaScriptCore.h>
二、设置代理
<UIWebViewDelegate>
#UIWebView所有的代理方法
# - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType API_DEPRECATED("No longer supported.", ios(2.0, 12.0));
# - (void)webViewDidStartLoad:(UIWebView *)webView API_DEPRECATED("No longer supported.", ios(2.0, 12.0));
# - (void)webViewDidFinishLoad:(UIWebView *)webView API_DEPRECATED("No longer supported.", ios(2.0, 12.0));
# - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error API_DEPRECATED("No longer supported.", ios(2.0, 12.0));
三、定义变量并初始化
@property (nonatomic,strong) UIWebView *webView;
- (void)viewDidLoad {
[super viewDidLoad];
// self.webView = [[WKWebView alloc] initWithFrame:self.view.bounds];
// NSURL *url = [NSURL URLWithString:self.url];
// self.webView.UIDelegate = self;
// self.webView.navigationDelegate = self;
// NSString *body = self.body;
// NSLog(@">>>%@",self.url);
//
//// NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL: url];
//// [request setHTTPMethod: @"POST"];
//// [request setHTTPBody: [body dataUsingEncoding: NSUTF8StringEncoding]];
// _originRequest= [[NSMutableURLRequest alloc]initWithURL:url];
// [self.webView loadRequest: _originRequest];
// Do any additional setup after loading the view.
[SVProgressHUD load];
self.webView = [[UIWebView alloc] initWithFrame:self.view.bounds];
NSURL *url = [NSURL URLWithString:self.url]; // @"https://www.baidu.com"
self.webView.delegate = self; //代理
_originRequest= [[NSMutableURLRequest alloc]initWithURL:url];
[self.webView loadRequest: _originRequest];
[self.view addSubview:self.webView];
}
四、实现代理方法
#pragma mark - UIWebViewDelegate
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {
NSLog(@"Did start loading: %@ auth:%d", [[request URL] absoluteString],_authenticated);
if(!_authenticated) {
_authenticated=NO;
_urlConnection= [[NSURLConnection alloc]initWithRequest:_originRequest delegate:self];
[_urlConnection start];
return NO;
}
return YES;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
self.title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
JSContext *content = [self.webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
content[@"back"] = ^() {
// NSArray *arguments = [JSContext currentArguments];
// for (JSValue *jsValue in arguments) {
// NSLog(@"=======%@",jsValue);
// }
for (UIViewController *controller in self.navigationController.viewControllers) {
if ([controller isKindOfClass:[AuthenticationCenterViewController class]]) {
AuthenticationCenterViewController *A =(AuthenticationCenterViewController *)controller;
[self.navigationController popToViewController:A animated:YES];
}
}
};
[SVProgressHUD dismiss];
}
-(void)webView:(UIWebView*)webView didFailLoadWithError:(NSError*)error
{
// 102 == WebKitErrorFrameLoadInterruptedByPolicyChange
NSLog(@"***********error:%@,errorcode=%ld,errormessage:%@",error.domain,(long)error.code,error.description);
if(!([error.domain isEqualToString:@"WebKitErrorDomain"] && error.code==102)) {
//当请求出错了会做什么事情
}
[SVProgressHUD dismiss];
}
#pragma mark-NURLConnectiondelegate
-(void)connection:(NSURLConnection*)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge*)challenge
{
NSLog(@"WebController Got auth challange via NSURLConnection");
if([challenge previousFailureCount]==0)
{
_authenticated=YES;
NSURLCredential*credential=[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];
[challenge.sender useCredential:credential forAuthenticationChallenge:challenge];
}else{
[[challenge sender]cancelAuthenticationChallenge:challenge];
}
}
//**重点是这个方法 第一次加载会通过一个身份验证 当身份验证通过后会来到这个方法 然后重新加载https地址 然后在这里将要传递给该地址的参数写上 就ok了
-(void)connection:(NSURLConnection*)connection didReceiveResponse:(NSURLResponse*)response
{
NSLog(@"WebController received response via NSURLConnection");
// remake a webview call now that authentication has passed ok.
_authenticated=YES;
// NSString *body = [NSString stringWithFormat:@"msg=%@",self.baseStr];
[_originRequest setHTTPMethod:@"POST"];
[_originRequest setHTTPBody:[self.body dataUsingEncoding:NSUTF8StringEncoding]];
[self.webView loadRequest:_originRequest];
// Cancel the URL connection otherwise we double up (webview + url connection, same url = no good!)
[_urlConnection cancel];
}
- (void)URLSession:(NSURLSession*)session didReceiveChallenge:(NSURLAuthenticationChallenge*)challenge completionHandler:(void(^)(NSURLSessionAuthChallengeDisposition disposition,NSURLCredential*__nullablecredential))completionHandler{
NSLog(@"didReceiveChallenge");
// if([challenge.protectionSpace.host isEqualToString:@"api.lz517.me"] /*check if this is host you trust: */ ){
completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
// }
}
// We use this method is to accept an untrusted site which unfortunately we need to do, as our PVM servers are self signed.
- (BOOL)connection:(NSURLConnection*)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace*)protectionSpace
{
return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
}
从网页在跳转原界面的方法可以用
- (void)webViewDidFinishLoad:(UIWebView *)webView {
JSContext *content = [self.webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
content[@"click_fn"] = ^() {
[self.navigationController popViewControllerAnimated:YES];
};
}
菜鸟一枚，多多批评！！！
