#import <AtSugar/AtSugar.h> // You can put this in your *.pch

//
// Grab a weak reference to `self`:
//

@weakSelf()
[self saveBlock:^{
    [weakSelf go]; // `weakSelf` will be captured weakly
}];


//
// Easily implement the singleton pattern
//

@interface MyClass : NSObject

+ (instancetype)sharedInstance;

@end

@implementation MyClass

@singleton(sharedInstance)

@end


//
// Easily implement associated objects
//

#import <objc/runtime.h>

@interface UIImage (MyCategory)

@property (strong, nonatomic) NSString* myProperty;

@end

@implementation UIImage (MyCategory)

@associated_object (myProperty, setMyProperty)

@end


//
// Declarative class properties
//

@interface MyCell : UICollectionViewCell

+ (NSString*)xibName;

@end

@implementation MyCell

@declare_class_property (xibName, @"MyCell.xib")

@end