gistfile1.m

#import "CustomAnnotationView.h"

#import <QuartzCore/QuartzCore.h>

@interface CustomAnnotationView()

- (CAAnimation *)rotationAnimation;
- (CAAnimation *)scaleAnimation;

@end

@implementation CustomAnnotationView

- (instancetype)initWithAnnotation:(id <MKAnnotation>)annotation reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithAnnotation:annotation reuseIdentifier:reuseIdentifier];

    if (self != nil) {
        CGRect frame = self.frame;
        frame.size.width = 32.0f;
        frame.size.height = 32.0f;
        self.frame = frame;
        self.backgroundColor = [[UIColor blueColor] colorWithAlphaComponent:0.5f];
        self.layer.borderColor = [[UIColor blackColor] CGColor];
        self.layer.borderWidth = 1.0f;
        [self.layer addAnimation:[self rotationAnimation] forKey:@"spin"];
        NSLog(@"self.frame: %@", NSStringFromCGRect(self.frame));
    }

    return self;
}

- (void)awakeFromNib {
    CAAnimationGroup *ag = nil;

    [super awakeFromNib];
    ag = [CAAnimationGroup animation];
    ag.animations = @[[self rotationAnimation], [self scaleAnimation]];
    ag.duration = 2.0f;
    ag.repeatCount = INFINITY;
    ag.autoreverses = YES;
    ag.removedOnCompletion = NO;

    [self.layer addAnimation:ag forKey:@"ag"];
//    [self.layer addAnimation:[self scaleAnimation] forKey:@"scale"];
//    [self.layer addAnimation:[self rotationAnimation] forKey:@"spin"];
    self.label.text = @"label";
}

- (void)prepareForReuse {
    NSLog(@"%@ prepareForReuse", self);
    [super prepareForReuse];
}

- (CAAnimation *)rotationAnimation {
    CABasicAnimation *rotation = [CABasicAnimation animationWithKeyPath:@"transform"];

    rotation.valueFunction = [CAValueFunction functionWithName:kCAValueFunctionRotateZ];
    rotation.fromValue = @0.0f;
    rotation.toValue = @((CGFloat)M_PI * 2.0);
    rotation.duration = 2.0f;
    rotation.repeatCount = INFINITY;
    rotation.removedOnCompletion = NO;

    return rotation;
}

- (CAAnimation *)scaleAnimation {
    CABasicAnimation *scale = [CABasicAnimation animationWithKeyPath:@"transform"];

    scale.valueFunction = [CAValueFunction functionWithName:kCAValueFunctionScale];
    scale.fromValue = @[@1.0f, @1.0f, @1.0f];
    scale.toValue = @[@2.0f, @2.0f, @2.0f];
    scale.duration = 2.0f;
    scale.repeatCount = INFINITY;
    scale.autoreverses = YES;
    scale.removedOnCompletion = NO;

    return scale;
}

@end