ios UIScrollView 下拉与顶部空白颜色填充问题

通过下面的方法可以解决，UIScrollView 下拉时可以将与顶部空白区域填充为与顶部颜色一致的颜色！

- (void)createTotalScrollView

{

    if (!_totalScrollView)

    {

        _totalScrollView = [[TPKeyboardAvoidingScrollView alloc]initWithFrame:CGRectMake(0, 0, kDEVICEWIDTH,  self.frame.size.height)];

        _totalScrollView.bounces = YES;

        _totalScrollView.scrollEnabled = YES;

        _totalScrollView.backgroundColor = TFCOLOR_EFEFEF;

        _totalScrollView.delegate = self;

        // 蓝色背景

        UIView* backgroundView = [[UIView alloc] init];

        backgroundView.backgroundColor = loadColor(@"#0093FF");

        backgroundView.frame = CGRectMake(0, -200, kDEVICEWIDTH, 200);

        [_totalScrollView addSubview:backgroundView];

        if (iPhone4)

        {

            _totalScrollView.contentSize = CGSizeMake(kDEVICEWIDTH, kDEVICEHEIGHT + 140);

        }

        else if (iPhone5)

        {

            _totalScrollView.contentSize = CGSizeMake(kDEVICEWIDTH, kDEVICEHEIGHT + 30);

        }

        else if (iPhone6 || iPhone6Plus)

        {

            _totalScrollView.contentSize = CGSizeMake(kDEVICEWIDTH, kDEVICEHEIGHT - 60);

        }

        else

        {

           _totalScrollView.contentSize = CGSizeMake(kDEVICEWIDTH, kDEVICEHEIGHT);

        }

        [self addSubview: _totalScrollView];

    }

}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

    CGFloat offsetY = scrollView.contentOffset.y;

    CGFloat insetTop = 0;

    if (offsetY >= 200) {

        insetTop= 200;

    }else{

        insetTop = 0;

    }

    //解决设置contentInset与下拉刷新冲突问题

    if (scrollView.contentInset.top >= 0 && (scrollView.contentInset.top <= 200))

    {

        scrollView.contentInset = UIEdgeInsetsMake(insetTop, 0, 0, 0);

    }

}

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