What is NSURL in Swift?
An object that represents the location of a resource that connects to the URL; use NSURL when you need reference semantics or other Foundation-specific behavior. mac OS 10.0+
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How is a string URL encoded?
The urlencode() function is a built-in function in PHP that is used to encode the URL. This function returns a string consisting of all non-alphanumeric characters except -_. and replace it with the percent sign (%) followed by two hexadecimal digits and spaces encoded as plus signs (+).
How do you percent encode a string?
URL encoding and decoding tool
- Convert the character string to a byte sequence using UTF-8 encoding.
- Convert each byte that is not an ASCII letter or digit to %HH, where HH is the hexadecimal value of the byte.
What is addPercentEncoding?
addedPercentEncoding(withAllowedCharacters:) Returns a new string created from the sink by replacing all characters not in the specified set with percentage-encoded characters.
What is URLSession in Swift?
The URLSession is used to create URLSessionTask instances, which can get and return data to your application, and download and upload files to web services. Configure a session with a URLSessionConfiguration object. This setting manages caching, cookies, connectivity, and credentials.
What is the difference between NSURLConnection and NSURLSession?
An NSURLConnection object handles a single request and any follow-on requests. An NSURLSession object manages multiple tasks, each of which represents a single URL request and any follow-up requests.
What is the structure of an NSURL object?
Structure of a URL. An NSURL object is made up of two parts: a potentially null base URL, and a string that resolves to the base URL. An NSURL object is considered absolute if its string part resolves completely without a base; all other URLs are considered relative.
Can an NSURL be used to construct a URL?
NSURL also has the NSURL initializer (string:relativeToURL:), which can be used to construct a URL from a string relative to a base URL. The behavior of this method can be a source of confusion due to how it treats /parents in relative paths.
How is nsurlconnection similar to nsurlsession in objc?
Each task builder method has a version with and without a finishHandler property, for example –dataTaskWithRequest: and –dataTaskWithRequest:completionHandler:. Similar to NSURLConnection -sendAsynchronousRequest:queue:completionHandler:, specifying a completion handler creates an implicit delegate to be used instead of the task’s session.
Can a string be passed as NSURL?
If a value is a URL, it must be stored and passed as NSURL; combining the two types is reckless and lazy API design. NSURL also has the NSURL initializer (string:relativeToURL:), which can be used to construct a URL from a string relative to a base URL.