[英]iOS - UIWebView loading an image located in the tmp folder
我在应用程序的临时文件夹中保存了一个图像文件，例如IMG.png。 我使用以下方法将HTML字符串注入UIWebView中：
NSString *HTML = [NSString stringWithFormat:
@"<body><h2>%@</h2><img src=\"%@\"></img><p>%@</p>%@</body>",
title, image, body];
[webView loadHTMLString:HTML baseURL:[NSURL URLWithString:HOST]];
我尝试了NSString image多种路径组合，但无法获得此WebView来正确加载本地图像。
你能帮我么？
这是我用来将图像保存在temp文件夹中的方法：
[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);
}
}
[webView loadHTMLString:HTML baseURL:[NSURL URLWithString:HOST]]; //the 'HOST' must be your application's temp folder
尝试使用NSURL组成文件URL：
NSURL *url = [NSURL fileURLWithPath:[[NSTemporaryDirectory() stringByAppendingPathComponent:@"filename"] stringByAppendingPathExtension:@"jpg"]];
NSString *image = [url absoluteString];
（假设您的图片文件名是“ filename.jpg”）
应导致类似以下内容：
file://localhost/private/var/mobile/Applications/E754629C-4163-4829-9D10-89D55A61264E/tmp/filename.jpg
希望这可以帮助。
从JavaScript在WKWebView的iOS tmp /文件夹中加载图像文件
[英]Loading an image file from iOS tmp/ folder in WKWebView from JavaScript
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