<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
</head>
<body>
<button style="width:120px; height = 60px;" onclick="getImage();">插入图片</button>
<script>
function getImage(){
// 生成接口（在OC在截取接口）
window.location.href = 'lf://getImage';
}
</script>
</body>
</html>
#import "ViewController.h"
@interface ViewController ()<UIWebViewDelegate>
@property (nonatomic , strong) UIWebView *webView;
@property (nonatomic , copy) NSString *isIncreaseImg;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 初始化webView
self.webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height)];
self.webView.delegate = self;
[self.view addSubview:self.webView];
// 加载本地网页
NSURL *url = [[NSBundle mainBundle] URLForResource:@"index" withExtension:@"html"];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
[self.webView loadRequest:request];
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
// 截取接口
NSString *str = request.URL.absoluteString;
NSRange range = [str rangeOfString:@"lf://"];
// 如果发现接口，则执行相关操作
if (range.location != NSNotFound) {
[self htmlCallOC];
}
return YES;
}
#pragma mark -- 操作网页 --
- (void)webViewDidFinishLoad:(UIWebView *)webView{
// 插入图片
if([self.isIncreaseImg isEqualToString:@"incareaseImage"]){
NSString *str4 = @"var img = document.createElement('img');"
"img.src = 'ply.png';"
"document.body.appendChild(img);";
[webView stringByEvaluatingJavaScriptFromString:str4];
self.isIncreaseImg = @"imageIsInceased";
}else{
NSLog(@"%@",self.isIncreaseImg);
}
}
#pragma mark -- 执行相关操作 --
- (void)htmlCallOC{
NSLog(@"HTML成功调用OC");
if (self.isIncreaseImg ==nil) {
self.isIncreaseImg = @"incareaseImage";
}
[self webViewDidFinishLoad:self.webView];
}
@end
