小编Aar*_*oAi的帖子

我已经学习Swift 2.2好几天了.完成官方教程后,我正在尝试制作一些功能样本.例如,我正在尝试制作一个头像装饰器.

@IBAction func moveAvatar(recognizer:UIPanGestureRecognizer) {
    recognizer.maximumNumberOfTouches = 1
    recognizer.minimumNumberOfTouches = 1
    let debugOutOfBounds = false
    let debugGestureRecognizer = false
    let debugVelocity = true
    if (debugGestureRecognizer) {
        print("pan")
    }
    let translation = recognizer.translationInView(self.avatar)

    let standardAvatarSize:CGFloat = Conf.Size.avatarRadius * 2
    if (self.avatar.frame.width <  standardAvatarSize) {
        self.avatar.frame = CGRect(origin: self.avatar.frame.origin, size: CGSize(width: standardAvatarSize, height:standardAvatarSize))
    }
    if let view = recognizer.view {
        switch recognizer.state {
        case .Began:
            if (debugVelocity) {
                print("Began: velocity: \(recognizer.velocityInView(view))  translation: \(translation)")
            }

            self.panAvatarLastTranslation = translation
            self.avatar.center = CGPoint(x: self.avatar.center.x …

FROM scratch
MAINTAINER Aario <AarioAi@gmail.com>
ENV SHARED_GROUP docker

我用上面的dockerfile构建了一个docker镜像。运行后，docker build -t "aario/centos" . 它将创建此图像aario / centos和该<none>图像：

可以吗 以及如何解决呢？

当我运行docker rmi 2f???????以删除aario / centeros图像时。该<none>图像将在同一时间被移除。

例如，有一个restful APIGET http://luexu.com/users/{page}来列出第N 页中的用户。假设每个页面有 20 个用户。数据库中共有 100 个用户。GET http://luexu.com/users/5返回第 80 个到第 100 个用户。

那么查询GET http://luexu.com/users/10呢？它超出了总用户数。哪个是返回空列表、空数组[]或返回空数组的更好设计404？

200？

{
    "code": 200,
    "msg": "OK",
    "data": []
}

还是204？

{
    "code": 204,
    "msg": "OK",
    "data": []
}

还是404？

{
    "code": 404,
    "msg": "Not Found",
    "data": null
}