iOS 网页（Webview）代码片段：UIWebView中Html中用JS调用OC方法及OC执行JS代码

HTML代码：

<html>

<head>

<title>HTML中用JS调用OC方法</title>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

[removed]

function openAlbum()

{

// 打开相册（openMyAlbum为OC中的方法）

[removed].href = 'ios://openMyAlbum';

}

function openCamera()

{

// 打开相机（openMyCamera为OC中的方法）

[removed].href = 'ios://openMyCamera';

}

[removed]

</head>

<body>

<br/>

<input type="button" value="打开相机"> <br><br/>

<input type="button" value="打开相册">

</body>

</html>

OC代码：

#import "ViewController.h"

@interface ViewController ()<UIWebViewDelegate>

@property (weak, nonatomic) IBOutlet UIWebView *webview;

- (IBAction)getTitle;

@end

@implementation ViewController

- (void)viewDidLoad

{

[super viewDidLoad];

NSURL *url = [[NSBundle mainBundle] URLForResource:@"test.html" withExtension:nil];

[self.webview loadRequest:[NSURLRequest requestWithURL:url]];

self.webview.delegate = self;

self.webview.dataDetectorTypes = UIDataDetectorTypeAll;

}

#pragma mark UIWebViewDelegate方法

/**

*开始加重请求拦截

*/

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType

{

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;

}

/**

* OC执行JS代码

*/

- (IBAction)getTitle {

[self.webview stringByEvaluatingJavaScriptFromString:@"alert(document.title);"];

}

-(void)openMyAlbum

{

UIImagePickerController *vc = [[UIImagePickerController alloc]init];

vc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

[self presentViewController:vc animated:YES completion:nil];

}

-(void)openMyCamera

{

UIImagePickerController *vc = [[UIImagePickerController alloc]init];

vc.sourceType = UIImagePickerControllerSourceTypeCamera;

[self presentViewController:vc animated:YES completion:nil];

}

@end

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