Objective-C: How to add query parameter to NSURL?

Question

Since iOS 7 you can use NSURLComponents that is very simple to use. Take a look on these examples:

Example 1

NSString *urlString = @"https://mail.google.com/mail/u/0/?shva=1#inbox";
NSURLComponents *components = [[NSURLComponents alloc] initWithString:urlString];

NSLog(@"%@ - %@ - %@ - %@", components.scheme, components.host, components.query, components.fragment);

Example 2

NSString *urlString = @"https://mail.google.com/mail/u/0/?shva=1#inbox";
NSURLComponents *components = [[NSURLComponents alloc] initWithString:urlString];

if (components) {
    //good URL
} else {
    //bad URL
}

Example 3

NSURLComponents *components = [NSURLComponents new];
[components setScheme:@"https"];
[components setHost:@"mail.google.com"];
[components setQuery:@"shva=1"];
[components setFragment:@"inbox"];
[components setPath:@"/mail/u/0/"];

[self.webview loadRequest:[[NSURLRequest alloc] initWithURL:[components URL]]];

But you can do many other things with NSURLComponents take a look on NSURLComponents class reference on Apple documentation or on this link: http://nshipster.com/nsurl/

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