iOS UIWebView 中 js调用OC 打开相册 获取图片， OC调用js 将图片加载到html上
线上html
<!DOCTYPE html>
<html>
<head>
<title>HTML中用JS调用OC方法</title>
<style>
#div1 {
background-color:#ccc;
width:100px;
height:100px;
position:absolute;
top:400px
}
</style>
<meta http-equiv="Content-Type"content="text/html; charset=UTF-8">
<script>
function getImg(url) {
var oDiv = document.getElementById("div1");
var oImg = document.getElementById("img1");
oImg.src = url;
}
</script>
</head>
<body>
<p >
<img src="" height="200" width="200" />
</p>
<br/>
<a href='ios://openMyAlbum'>打开相册</a><br><br/>
</body>
</html>在oc中
//
// ViewController.m
//
// Created by Hwangkop on 15/11/30.
// Copyright © 2015年 Hp. All rights reserved.
//
#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface ViewController () <UIWebViewDelegate, UINavigationControllerDelegate, UIImagePickerControllerDelegate>
{
UIWebView *_webView;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
_webView = [[UIWebView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:_webView];
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];
[_webView loadHTMLString:htmlCont baseURL:baseURL];
_webView.delegate = self;
}
-(BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType
{
//通过url获取 js方法在oc中实现该方法
NSString *urlstr = request.URL.absoluteString;
NSRange range = [urlstr rangeOfString:@"ios://"];
if (range.length!=0) {
NSString *method = [urlstr substringFromIndex:(range.location+range.length)];
SEL selctor = NSSelectorFromString(method);
[self performSelector:selctor withObject:nil];
}
return YES;
}
//要实现的方法
-(void)openMyAlbum {
UIImagePickerController *vc = [[UIImagePickerController alloc] init];
vc.delegate = self;
vc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:vc animated:YES completion:nil];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"pic_100.png"]]; // 保存
[UIImagePNGRepresentation(image)writeToFile: filePath atomically:YES];
[picker dismissViewControllerAnimated:YES completion:^{
// NSLog(@"%@", filePath);
// oc 调用js 并且传递图片路径参数
[_webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"getImg('%@')", filePath]];
}];
}
@end