替换HTML字符串中的图像URL

Question

Hello I have a html string, with tags for every image.

I can extract the url of every image, but what I want is to save those images in the device, and then replace each one's image url with the corresponding path from my sandbox and then display them via UIWebView .

Any ideas how do I do that?

Thank you!

Answer 1

Well if you have the URL for an image, you can save it like this

NSData *imageData = [NSData dataWithContentsOfURL:[NSURL urlWithString:string]];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"MyFile"];
[imageData writeToFile:filePath atomically:YES];

To replace the URLs in the HTML string simply use the method

- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement