Short and useful Objective-C snippets?

Question

Since Xcode 4, there is now a code snippet section that offers snippets through autocomplete when typing. I would be very interested in the fragments that you all saved there. Which fragments keep you the most (and why)?

Please post only the actual snippets (which means that snarky “don't need any sninkin snippets” and no “i love snippets that make <XYZ>"), and only snippets that are short and sweet (i.e. no more than ~ 20 lines maximum). If the snippet is clearly not useful, explain why you think so.;)

Answer 1

I don't know if this is the case, but I always use this snippet when I add a UITableView in any of my controllers.

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *cellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; if(cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier]; // Do something here...................... } // Do something here too ......................... return cell; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return ; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return ; } 

its very convenient if you are not using the UITableViewController to display the contents of the table.

Answer 2

Sending a block in the current queue after the specified number of seconds:

 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, <#seconds#>*1e9), dispatch_get_current_queue(), <#block#>); 

Answer 3

Here are my two comments. I use a lot of them.

Headline Comment:

 // ---------------------------------------------------------------------------------------------------------------- # pragma mark - # pragma mark <#comment#> # pragma mark - // ---------------------------------------------------------------------------------------------------------------- 

Subcomponent:

 // ---------------------------------------------------------------------------------------------------------------- // <#comment#> // ---------------------------------------------------------------------------------------------------------------- 

Answer 4

Im often adds private class interfaces with class extensions:

 @interface <#ClassName#> () @end 

This means that the public interface is completely free of internal things, especially now that we can have purely synthesized properties ( gist example ).

Answer 5

Several collections are here:

https://github.com/mneorr/snippie/tree/master/backup

and here:

https://github.com/jad/xcode-code-snippets

which you can paste into this folder:

 ~/Library/Developer/Xcode/UserData/CodeSnippets 

Answer 6

While debugging this snippet is really useful. It allows you to find out the name of the class, the name of the function and you can also add your comments.

 NSLog(@"%s [Line %d] %@ ", __PRETTY_FUNCTION__, __LINE__,<#comment#>); 

Answer 7

There seems to be no class category between factory fragments:

 @interface <#ClassName#> (<#CategoryName#>) @end 

Answer 8

This is a blog that I created for the same purpose ...

http://ios-funda.blogspot.in/

Answer 9

I also have standard presentation lifecycle methods in my snippets (which are used daily):

I use v w a shortcut for

 - (void) viewWillAppear:(BOOL)animated { [super viewWillAppear: animated]; } 

v d l for viewDidLoad etc.