Xcode Code Snippets

This is the collection of my user-defined code snippets for Xcode. Free feel to add them to your own collection.

Install

• Clone, fork or download this collection of code snippets.
• Copy the code snippet files to: ~/Library/Developer/Xcode/UserData/CodeSnippets

Hint

To make life easier for me, I clone this repo to my CodeSnippets directory. This makes it easier for me to keep this repo up to date and simplifies sharing my code snippets across multiple machines. You can do the same, but I recommend forking this repo first so you can store your own code snippets along with the ones in this collection.

Code Snippet Listing

Each code snippet shortcut is prefixed with wps to avoid conflict with other shortcuts. This also groups the code snippets in the Code Completion window.

Class Extension

Shortcut: wpsClassExtension
File: 220BFE9F-59FE-4179-8E5A-759ACD66F1CC.codesnippet
Scope: TopLevel
Summary: Creates a class externsion.

@interface <#name#> ()  
<#property or method#>  
@end  

Dispatch Async Default Queue

Shortcut: wpsDispatchAsyncDefaultQueue
File: D578695C-A1CE-4947-876A-E4E559605202.codesnippet
Scope: CodeBlock
Summary:

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{  
    <#code#>  
});  

Dispatch Async Main Queue

Shortcut: wpsDispatchAsyncMainQueue
File: 00EC4395-2374-4C2A-8D4C-5B4DF268F9D0.codesnippet
Scope: CodeBlock
Summary:

dispatch_async(dispatch_get_main_queue(), ^{  
    <#code#>  
});  

DLog #define Statements

Shortcut: wpsDLog
File: 21B87E09-B160-4DA9-85A6-67AB236A2F54.codesnippet
Scope: TopLevel
Summary: Defines the DLog statements for the pre-compiled header.

#ifdef DEBUG  
   #define DLog(...) NSLog(@"%s %@", __PRETTY_FUNCTION__, [NSString stringWithFormat:__VA_ARGS__])  
   #define ALog(...) [[NSAssertionHandler currentHandler] handleFailureInFunction:[NSString stringWithCString:__PRETTY_FUNCTION__ encoding:NSUTF8StringEncoding] file:[NSString stringWithCString:__FILE__ encoding:NSUTF8StringEncoding] lineNumber:__LINE__ description:__VA_ARGS__]  
#else  
   #define DLog(...) do { } while (0)  
   #ifndef NS_BLOCK_ASSERTIONS  
      #define NS_BLOCK_ASSERTIONS  
   #endif  
   #define ALog(...) NSLog(@"%s %@", __PRETTY_FUNCTION__, [NSString stringWithFormat:__VA_ARGS__])  
#endif  
  
#define ZAssert(condition, ...) do { if (!(condition)) { ALog(__VA_ARGS__); }} while(0)  

IBOutlet Property

Shortcut: wpsIBOutlet
File: E996CD71-CF1E-4A4E-AF95-C7B5BBE2BCA3.codesnippet
Scope: All
Summary: Defines a declared property outlet.

@property (nonatomic, weak) IBOutlet <#type#> *<#variable#>;  

initWithDefaultNib

Shortcut: wpsInitWithDefaultNib
File: 796A1936-1B22-43E8-B0D4-E7EAA939CFD1.codesnippet
Scope: ClassImplementation
Summary: initWithDefaultNib method stub.

- (id)initWithDefaultNib  
{  
   self = [super initWithNibName:@"<#nibname#>" bundle:nil];  
   if (self) {  
      <#initializations#>  
   }  
   return self;  
}  

initWithDefaultNib Declaration

Shortcut: wpsInitWithDefaultNib
File: E811EA70-B05F-4799-89D7-943CAF92AB1D.codesnippet
Scope: ClassInterfaceMethods
Summary: Declares - (id)initWithDefaultNib method.

- (id)initWithDefaultNib;  

initWithDefaultWindowNib Declaration

Shortcut: wpsInitWithDefaultWindowNib
File: EA4152C2-16A8-4B05-A319-6BA5DD92ADA8.codesnippet
Scope: ClassImplementation
Summary: initWithDefaultWindowNib method stub for Mac.

- (id)initWithDefaultWindowNib  
{  
   self = [super initWithWindowNibName:@"<#NibName#>"];  
   if (self) {  
      <#initializations#>  
   }  
   return self;  
}  

Managed Object Context Save

Shortcut: wpsMocSave
File: 395D1D59-17F0-4524-819F-7B410FA0E902.codesnippet
Scope: CodeBlock
Summary: MOC save wrapped in a ZAssert.

   NSError *error = nil;  
   ZAssert([context save:&error], @"Context save error: %@\n%@", [error localizedDescription], [error userInfo]);  

MIT License Statement

Shortcut: mit
File: 32D765A1-3B1E-4A88-A13D-F9B4CEB926A5.codesnippet
Scope: All
Summary: File header comment.

/**  
 **   <#name#>  
 **  
 **   Created by Kirby Turner.  
 **   Copyright (c) 2014 White Peak Software. All rights reserved.  
 **  
 **   Permission is hereby granted, free of charge, to any person obtaining  
 **   a copy of this software and associated documentation files (the  
 **   "Software"), to deal in the Software without restriction, including  
 **   without limitation the rights to use, copy, modify, merge, publish,  
 **   distribute, sublicense, and/or sell copies of the Software, and to permit  
 **   persons to whom the Software is furnished to do so, subject to the  
 **   following conditions:  
 **  
 **   The above copyright notice and this permission notice shall be included  
 **   in all copies or substantial portions of the Software.  
 **  
 **   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  
 **   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF  
 **   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  
 **   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  
 **   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  
 **   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE  
 **   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  
 **  
 **/  

PerformSelector Leak

Shortcut: wpsPerformSelectorLeak
File: 64A56053-8AA1-43C0-A89F-5916D8212A06.codesnippet
Scope: CodeBlock
Summary: #pragram to ignore PerformSelector leak warning.

#pragma clang diagnostic push  
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"  
<#[target performSelector]#>  
#pragma clang diagnostic pop  

Property Assign

Shortcut: wpsPropertyAssign
File: 2A05C797-72E5-4890-A7CB-2C8A6EF193A5.codesnippet
Scope: All
Summary: Defines a declared property.

@property (nonatomic, assign) <#type#> <#variable#>;  

Property Block

Shortcut: wpsPropertyBlock
File: 01CD69E2-D847-4F64-A9CB-5EF18876C27F.codesnippet
Scope: ClassInterfaceMethods
Summary: Creates a block as a property

@property (nonatomic, copy) void (^<#blockName#>)(<#parameterTypes#>);  

Property Copy

Shortcut: wpsPropertyCopy
File: B4C52A34-411B-48EF-8D22-9917F6757844.codesnippet
Scope: ClassInterfaceMethods
Summary: Defines a declared property

@property (nonatomic, copy) <#type#> *<#variable#>;  

Property Strong

Shortcut: wpsPropertyStrong
File: 3357A88A-4687-4AC1-BE42-9BE3ACE61B53.codesnippet
Scope: All
Summary: Defines a declared property.

@property (nonatomic, strong) <#type#> *<#variable#>;  

Property Weak

Shortcut: wpsPropertyWeak
File: C82215E5-4376-4AE3-AAA9-56A37DB14EA9.codesnippet
Scope: All
Summary: Defines a declared property as weak.

@property (nonatomic, weak) <#type#> <#variable#>;  

Red runtime frame

Shortcut: wpsRedBorder
File: EAD65E33-AB85-465C-9243-3772E8AD7A3C.codesnippet
Scope: CodeBlock
Summary: Draws a red frame border at runtime.

CALayer *layer = [<#view#> layer];  
layer.borderColor = [[UIColor redColor] CGColor];  
layer.borderWidth = 1.0f;  

Strong Self

Shortcut: wpsStrongSelf
File: FC497447-5006-4EF9-8C3E-A24136122677.codesnippet
Scope: CodeBlock
Summary: Creates a strong reference to self.

__typeof__(self) strongSelf = weakSelf;  

Synthesize

Shortcut: wpsSynthesize
File: 004CE6E9-88B2-4F67-B4F8-2511884A0968.codesnippet
Scope: ClassImplementation
Summary: Synthesize property.

@synthesize <#property#> = _<#ivar#>;  

UITableView Stub

Shortcut: wpsTable
File: 08FBEC3D-4375-4E86-9B01-DE3492CF0B02.codesnippet
Scope: ClassImplementation
Summary: UITableView data and delegate method stubs.

#pragma mark - UITableViewDataSource and UITableViewDelegate methods  
  
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView  
{  
   NSInteger count = 1;  
   return count;  
}  
  
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section  
{  
   NSInteger count = 0;  
   return count;  
}  
  
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section  
{  
   return @"Header Title";  
}  
  
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath  
{  
   static NSString *cellID = @"cellID";  
   UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];  
   if (!cell) {  
      cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID];  
   }  
     
   NSString *text =[NSString stringWithFormat:@"Row %i", [indexPath row]];  
   [[cell textLabel] setText:text];  
     
   return cell;  
}  
  
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath  
{  
   [tableView deselectRowAtIndexPath:indexPath animated:YES];  
}  

Weak Self

Shortcut: wpsWeakSelf
File: F8F948D0-3873-41ED-B391-2EAFF5EEA0E2.codesnippet
Scope: CodeBlock
Summary: Creates a weak reference to self

__weak __typeof__(self) weakSelf = self;  

More About Code Snippets

Learn more about using and creating your own Code Snippets from this article, Be More Productive in Xcode Using Code Snippets.

lscs.py Script

lscs.py is a python script that lists the code snippets for the current user. The listing shows the title, shortcut, and summary for each code snippet file.

Example: python lscs.py

lscs.py is also used to create the list of code snippets shown above. You can do the same by using the -f markdown (or --format=markdown) command line parameter.

Example: python lscs.py --f markdown

Support, Bugs and Feature requests

There is absolutely no support offered for this collection of code snippets. You're on your own! However, free feel to send me a message or even a pull request if you have an interesting and useful code snippet to share.

License

The MIT License

Copyright (c) 2012-2014 White Peak Software Inc

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.