ios中webview的高级用法
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转自：http://www.cnblogs.com/gcb999/p/3178728.html
框架：
webview与js的通信框架
#import "MJViewController.h"
#import "MBProgressHUD+Add.h"
@interface MJViewController ()
@end
@implementation MJViewController
- (void)viewDidLoad
{
[super viewDidLoad];
[self loadRemoteHTML];
}
#pragma mark 加载远程的HTML页面
- (void)loadRemoteHTML {
NSURL *url = [NSURL URLWithString:@"http://192.168.1.106:8080/MJServer/"];
self.webView.delegate = self;
[self.webView loadRequest:[NSURLRequest requestWithURL:url]];
}
#pragma mark 加载其他文件
- (void)loadRemoteTxt {
NSURL *url = [NSURL URLWithString:@"http://192.168.1.106:8080/MJServer/abc.txt"];
self.webView.delegate = self;
[self.webView loadRequest:[NSURLRequest requestWithURL:url]];
}
#pragma mark 加载PDF文件
- (void)loadLocalPDF {
//[self.webView loadData:<#(NSData *)#> MIMEType:<#(NSString *)#> textEncodingName:<#(NSString *)#> baseURL:<#(NSURL *)#>];
NSURL *url = [NSURL fileURLWithPath:@"/Users/apple/Desktop/第10章-网络.pdf"];
self.webView.delegate = self;
[self.webView loadRequest:[NSURLRequest requestWithURL:url]];
}
#pragma mark 加载HTML字符串
- (void)loadHTMLString {
NSURL *url = [NSURL fileURLWithPath:@"/Users/apple/Pictures"];
[self.webView loadHTMLString:@"<html><body><img src=\'lufy.png\'></body></html>" baseURL:url];
}
#pragma mark - webview代理方法
- (void)webViewDidStartLoad:(UIWebView *)webView {
NSLog(@"开始加载页面");
[MBProgressHUD showMessag:@"哥正在帮你加载..." toView:self.view];
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
NSLog(@"页面加载完毕");
[MBProgressHUD hideHUDForView:self.view animated:YES];
self.backItem.enabled = self.webView.canGoBack;
self.forawrdItem.enabled = self.webView.canGoForward;
self.titleItem.title = [self.webView stringByEvaluatingjavascriptFromString:@"document.title"];
//[self.webView stringByEvaluatingJavaScriptFromString:@"fn();"];
}
#pragma mark webview每次加载之前都会调用这个方法
// 如果返回NO，代表不允许加载这个请求
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
// 说明协议头是ios
if ([@"ios" isEqualToString:request.URL.scheme]) {
NSString *url = request.URL.absoluteString;
NSRange range = [url rangeOfString:@":"];
NSString *method = [request.URL.absoluteString substringFromIndex:range.location + 1];
SEL selector = NSSelectorFromString(method);
if ([self respondsToSelector:selector]) {
[self performSelector:selector];
}
return NO;
}
return YES;
}
#pragma mark - 提供一个接口方法给JS调用
- (void)openCamera {
NSLog(@"打开了照相机");
}
- (void)call {
NSLog(@"打电话");
}
#pragma mark - 按钮方法
#pragma mark 前进
- (void)forawrd {
[self.webView goForward];
}
#pragma mark 后退
- (void)back {
[self.webView goBack];
}
@end
服务端的用法
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