A Sparrow 2.x extension for handling shake/motion events.

SHShakeEvent.h

//
//  SHShakeEvent.h
//
//  Created by Shilo White on 11/21/14.
//
//

#import <Sparrow/Sparrow.h>

SP_EXTERN NSString *const SHEventTypeShake;

typedef NS_ENUM(int, SHShakePhase)
{
    SHShakePhaseBegan,
    SHShakePhaseEnded,
    SHShakePhaseCancelled
};

@interface SHShakeEvent : SPEvent

- (instancetype)initWithType:(NSString *)type phase:(SHShakePhase)phase;
- (instancetype)initWithType:(NSString *)type phase:(SHShakePhase)phase bubbles:(BOOL)bubbles;
+ (instancetype)shakeEventWithType:(NSString *)type phase:(SHShakePhase)phase;
+ (instancetype)shakeEventWithType:(NSString *)type phase:(SHShakePhase)phase bubbles:(BOOL)bubbles;

@property (nonatomic, readonly) SHShakePhase phase;

@end

SHShakeEvent.m

//
//  SHShakeEvent.m
//  Barebone
//
//  Created by Shilo White on 11/21/14.
//
//

#import "SHShakeEvent.h"

NSString *const SHEventTypeShake = @"SHEventTypeShake";

@implementation SHShakeEvent

- (instancetype)initWithType:(NSString *)type phase:(SHShakePhase)phase
{
    return [self initWithType:type phase:phase bubbles:YES];
}

- (instancetype)initWithType:(NSString *)type phase:(SHShakePhase)phase bubbles:(BOOL)bubbles
{
    if ((self = [super initWithType:type bubbles:bubbles]))
    {
        _phase = phase;
    }
    return self;
}

+ (instancetype)shakeEventWithType:(NSString *)type phase:(SHShakePhase)phase
{
    return [[self alloc] initWithType:type phase:phase];
}

+ (instancetype)shakeEventWithType:(NSString *)type phase:(SHShakePhase)phase bubbles:(BOOL)bubbles
{
    return [[self alloc] initWithType:type phase:phase bubbles:bubbles];
}

- (NSString *)description
{
    return [NSString stringWithFormat:@"[%@: type=\"%@\", bubbles=%@ phase:%@]",
            NSStringFromClass([self class]), self.type,
            self.bubbles ? @"YES" : @"NO",
            _phase == SHShakePhaseBegan ? @"SHShakePhaseBegan" : _phase == SHShakePhaseEnded ? @"SHShakePhaseEnded" : @"SHShakePhaseCancelled"];
}

@end

@implementation SPViewController (SHShakeEvent)

- (BOOL)canBecomeFirstResponder
{
    return YES;
}

- (void)viewDidAppear:(BOOL)animated
{
    [self becomeFirstResponder];
    [super viewDidAppear:animated];
}

- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
    if (motion == UIEventSubtypeMotionShake)
    {
        SHShakeEvent *beganEvent = [[SHShakeEvent alloc] initWithType:SHEventTypeShake phase:SHShakePhaseBegan];
        [self.root dispatchEvent:beganEvent];
    }
    [super motionBegan:motion withEvent:event];
}

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
    if (motion == UIEventSubtypeMotionShake)
    {
        SHShakeEvent *endedEvent = [[SHShakeEvent alloc] initWithType:SHEventTypeShake phase:SHShakePhaseEnded];
        [self.root dispatchEvent:endedEvent];
    }
    [super motionEnded:motion withEvent:event];
}

- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
    if (motion == UIEventSubtypeMotionShake)
    {
        SHShakeEvent *cancelledEvent = [[SHShakeEvent alloc] initWithType:SHEventTypeShake phase:SHShakePhaseCancelled];
        [self.root dispatchEvent:cancelledEvent];
    }
    [super motionCancelled:motion withEvent:event];
}

@end