Downloading HTML string into an NSString or Swift String variable in iOS

问题

Alternative titles

• How to download a web page data in Objective-C on iPhone?
• How to read entire content of an html resource file into an NSString *
• How to download a web page data in Swift?
• Saving HTML pages in an NSString

How do you get web page data and put the data into a string?

Something like:

NSString *webPageBody = GetWebPageData("www.mysite.com/webpage.html");

in the webPageBody, I would like to see "html my web page html".

回答1:

Swift 3.0

guard let url = URL(string: "http://www.example.com") else {
    return
}

do {
    let html = try String(contentsOf: url)
}
catch {
    //handle `error` here
}

Swift 2.3

guard let url = NSURL(string: "http://www.example.com") else {
    return
}

do {
    let html = try String(contentsOfURL: url)
}
catch {
    //handle `error` here
}

Objective-C

NSString *url = @"http://www.example.com";
NSURL *urlRequest = [NSURL URLWithString:url];
NSError *err = nil;

NSString *html = [NSString stringWithContentsOfURL:urlRequest encoding:NSUTF8StringEncoding error:&err];

if(err)
{
    //Handle 
}

来源：https://stackoverflow.com/questions/1867002/downloading-html-string-into-an-nsstring-or-swift-string-variable-in-ios