customProperty.m

customProperty.m

POPAnimatableProperty *countProperty = 
[POPAnimatableProperty propertyWithName:@"countUp" 
initializer:^(POPMutableAnimatableProperty *prop){
    prop.readBlock = ^(UILabel *label, CGFloat values[]) {
            //どの値を利用するか
        values[0] = [label.text intValue];
    };
    prop.writeBlock = ^(UILabel *label, const CGFloat values[]) {
        //変更した値をどこに更新するか
        label.text = [[NSString alloc] initWithFormat:@"%d", (int)values[0]];
    };
}];

POPBasicAnimation *countAnimation = [POPBasicAnimation new];
//自作プロパティをセット
countAnimation.property = countProperty;
countAnimation.timingFunction = 
    [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
countAnimation.duration = 10.0f;
countAnimation.fromValue = @(100);
countAnimation.toValue = @(2000);
[_countLabel pop_addAnimation:countAnimation forKey:@"constantAnimation"];