Simulator Screen Shot 2016年4月16日 00.27.57.png
One、UIWebView加载静态页面
做APP时，我们会展示静态页面，或与静态页面交互
代码语言：javascript复制self.webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 40, self.view.frame.size.width, self.view.frame.size.height - 20)];
NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
NSString * htmlPath = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"];
NSString * htmlCont = [NSString stringWithContentsOfFile:htmlPath encoding:NSUTF8StringEncoding error:nil];
[self.webView loadHTMLString:htmlCont baseURL:baseURL];
[self.view addSubview: _webView];与APP交互时，可以在静态页面中加如下代码
代码语言：javascript复制 <button id="btn_submit" onclick="Login('参数1')">返回</button>在APP调用的文件中，
<blockquote>
先导入头文件 #import <JavaScriptCore/JavaScriptCore.h>
遵守UIWebView的代理 <UIWebViewDelegate>
</blockquote>
代码语言：javascript复制JSContext *context = [_webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
context[@"Login"] = ^() {
// 在这里处理你要做的事情
NSArray *args = [JSContext currentArguments];
// NSString *strUrl = args[0];
// NSLog(@"%@",strUrl);
for (id obj in args) {
NSLog(@"%@",obj);
}
};Two、UIWebView加载网络页面和加载失败处理
之前写过浏览器网页与APP交互，在UIWebView内嵌与APP交互同样适用，开启穿越门
Simulator Screen Shot 2016年4月16日 01.20.24.png
导入文件 #import <JavaScriptCore/JavaScriptCore.h>
代码语言：javascript复制@interface ViewController ()
{
NSURLConnection *theConnection;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIWebView *myWebview = [[UIWebView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
[self.view addSubview:myWebview];
NSURL *url = [NSURL URLWithString:@"https://itunesconnect.apple.com/"];
NSURLRequest *request =[NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
timeoutInterval:10.0];
[myWebview loadRequest:request];
if (theConnection)
{
[theConnection cancel];
// SAFE_RELEASE(theConnection);
NSLog(@"safe release connection");
}
theConnection= [[NSURLConnection alloc]initWithRequest:request delegate:self startImmediately:YES];
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
if (theConnection) {
// SAFE_RELEASE(theConnection);
NSLog(@"safe release connection");
}
if ([response isKindOfClass:[NSHTTPURLResponse class]]){
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse*)response;
if ((([httpResponse statusCode]/100) == 2)){
NSLog(@"connection ok");
}
else{
NSError *error = [NSError errorWithDomain:@"HTTP" code:[httpResponse statusCode] userInfo:nil];
if ([error code] == 404){
NSLog(@"404");
[self webViewFail];
}
else if ([error code] == 403){
NSLog(@"403");
[self webViewFail];
}
}
}
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
if (theConnection) {
// SAFE_RELEASE(theConnection);
NSLog(@"safe release connection");
[self webViewFail];
}
if (error.code == 22) //The operation couldn’t be completed. Invalid argument
{
NSLog(@"22");
[self webViewFail];
}
else if (error.code == -1001) //The request timed out. webview code -999的时候会收到－1001
{
NSLog(@"-1001");
[self webViewFail];
}
else if (error.code == -1005) //The network connection was lost.
{
NSLog(@"-1005");
[self webViewFail];
}
else if (error.code == -1009) //The Internet connection appears to be offline
{
NSLog(@"-1009");
[self webViewFail];
}
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
/*
didFailLoadWithError中出现code ＝ -999错误。
错误原因：一个页面没有被加载完成之前，收到下一个请求。
*/
CLog(@"error%@",error);
if ([error code] == NSURLErrorCancelled) {
return;
}
[self webViewFail];
}
- (void)webViewFail
{
UILabel *content = [[UILabel alloc]initWithFrame:(CGRectMake(20, 100, 300, 100))];
NSString *originStr = @"Hello,中秋节！";
NSMutableAttributedString *attributedStr01 = [[NSMutableAttributedString alloc] initWithString: originStr];
[attributedStr01 addAttribute: NSForegroundColorAttributeName value: [UIColor blueColor] range: NSMakeRange(0, 4)];
//分段控制，第5个字符开始的3个字符，即第5、6、7字符设置为红色
[attributedStr01 addAttribute: NSForegroundColorAttributeName value: [UIColor redColor] range: NSMakeRange(4, 3)];
//赋值给显示控件label01的 attributedText
content.attributedText = attributedStr01;
[self.view addSubview:content];
// 这里为加载静态页面，进行展示错误信息
// UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
// NSString *path = [[NSBundle mainBundle] bundlePath];
// NSURL *baseURL = [NSURL fileURLWithPath:path];
// NSString * htmlPath = [[NSBundle mainBundle] pathForResource:@"webError" ofType:@"html"];
// NSString * htmlCont = [NSString stringWithContentsOfFile:htmlPath encoding:NSUTF8StringEncoding error:nil];
// [webView loadHTMLString:htmlCont baseURL:baseURL];
// [self.view addSubview: webView];
// JS 调用 OC
// 1、首先导入库 JavaScriptCore.framework
// JSContext *context = [webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
// context[@"btnSubmit"] = ^() {
// NSLog(@"返回上一页");
// };
}
