Question

我有一个图像文件保存在应用程序的临时文件夹中，比如IMG.png。我使用以下方法将HTML字符串注入UIWebView：

    NSString *HTML = [NSString stringWithFormat:
                     @"<body><h2>%@</h2><img src=\"%@\"></img><p>%@</p>%@</body>",
                     title, image, body];

    [webView loadHTMLString:HTML baseURL:[NSURL URLWithString:HOST]];

我为NSString image尝试了很多路径组合，但我无法让这个WebView正确加载我的本地图像。

你能帮帮我吗？

以下是我用于将图像保存在临时文件夹中的内容：

[self saveImage:result withFileName:post.title ofType:@"jpg" inDirectory:NSTemporaryDirectory()];

依赖于：

-(void) saveImage:(UIImage *)image withFileName:(NSString *)imageName ofType:(NSString *)extension inDirectory:(NSString *)directoryPath {

    if ([[extension lowercaseString] isEqualToString:@"png"]) {
        [UIImagePNGRepresentation(image) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.%@", imageName, @"png"]] options:NSAtomicWrite error:nil];
    } else if ([[extension lowercaseString] isEqualToString:@"jpg"] || [[extension lowercaseString] isEqualToString:@"jpeg"]) {
        [UIImageJPEGRepresentation(image, 1.0) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.%@", imageName, @"jpg"]] options:NSAtomicWrite error:nil];
    } else {
        NSLog(@"Image Save Failed\nExtension: (%@) is not recognized, use (PNG/JPG)", extension);
    }
}

Answer 1

     [webView loadHTMLString:HTML baseURL:[NSURL URLWithString:HOST]]; //the 'HOST' must be your application's temp folder

Answer 2

尝试使用NSURL编写文件URL：

NSURL *url = [NSURL fileURLWithPath:[[NSTemporaryDirectory() stringByAppendingPathComponent:@"filename"] stringByAppendingPathExtension:@"jpg"]];
NSString *image = [url absoluteString];

（假设您的图像文件名为“filename.jpg”）

应该会产生类似的结果：

file://localhost/private/var/mobile/Applications/E754629C-4163-4829-9D10-89D55A61264E/tmp/filename.jpg

希望这有帮助。

iOS - UIWebView加载位于tmp文件夹中的图像

2 个答案: