Objective-C static block members

staticblock.m

/*
 * Objective-C static block members compatible with Swift closure syntax
 * Two examples, A: with a return value and B: with parameters, can be combined
 * Objective-C lacks associated types and tuples, thus NSArray* for return type
 * Note that class specifiers do NOT synthesize getters / setters
 */

/// .h

@interface Foo

/// A: block with return value
@property (class, copy) NSArray *(^ mockResultTypeA)(void);

/// B: block with params
@property (class, copy) void(^ mockResultTypeB)(NSString *, NSError *);

@end

/// .m

static NSArray *(^ _mockResultTypeA)(void);
static void(^ _mockResultTypeB)(NSString *, NSError *);

@implementation Foo

/// A: getter / setter

+ (NSArray *(^)(void)) mockResultTypeA {
    return _mockResultTypeA;
}

+ (void)setMockResultTypeA:(NSArray *(^)(void))value {
    _mockResultTypeA = value;
}

/// B: getter / setter

+ (void(^)(NSString *, NSError *)) mockResultTypeA {
    return _mockResultTypeA;
}

+ (void)setMockResultTypeA:(void(^)(NSString *, NSError *))value {
    _mockResultTypeA = value;
}

@end