Principle for Mac 3.0 交互原型设计软件
Principle是前 Apple 工程师打造的一款交互设计工具，五分钟即可制作出一个具有完整交互动画的原型，并且可将交互动画生成视频或者 Gif 分享到 Dribbble、Twitter 等社交平台。此外 Principle 还支持多种尺寸的原型设计，包括 Apple Watch。
应网友要求更新。Principle 是一款新开发的交互设计软件。相比 Pixate 更容易上手，界面类似 Sketch 等做图软件，思路有点像用 Keynote 做动画，更「可视化」一些。发现目前还不能做条件相关的交互，例如「当 A 的 Scroll Release 位置大于某值时跳到下页」。作者目前在对软件进行升级开发，值得尝试和继续关注。
本产品 - 素描，主题，Flash之间和After Effects（加上交互原型一些很酷的功能），一个巧妙的搭配。让我印象深刻起初，一切似乎很熟悉。如果你已经用素描的工作，你可以很容易地得到一个原则处理：检查，图层列表，artbordy。
轻松创建从一个状态到另一个状态的转变 - 这是我在这类应用中最主要的。在原则的同时，也有将提高你的原型到一个新水平的其他可能性。
互动
这个工具的设计主要是为触摸屏设备，那么它允许您定义一组互动类型：自来水，dragenddrop，滚动，长按。
动画面板
有什么共同所有关于动漫的文章？他们强烈建议永远做线性动画，因为它没有在现实世界中存在。这里，原则上高度一次。默认情况下，每个动画使用易于在/易出效果，你可以很容易地重新配置自己。
驱动器面板
为了充分理解它是如何工作的，这需要时间。但对付它，你可以做令人惊奇的事情与你的原型。典型地，该驱动程序用于滚动或移动的情况下在单个元件上链接多个元件或悬挂若干处理器。说要出现覆层当拖动一个元素或任何元素刷卡期间旋转（如在火种，果冻）
What's New
Version 3.0:
Components can send events to parent
Send events to a component
Lockable layers
Drivers can now drive fill color, stroke color, and shadow color
Editing an animation plays it in the preview
Added option to import only the selected artboards from Sketch
Support for Sketch overrides
Added "touchable" option to make overlay layers
Export Images of Selected Layers added to the File Menu
"Select layer" added to canvas' context menu
Improved animation UI for layer names that don't exist on both artboards.
Sketch reimport maintains Principle/Sketch layer ordering
Sketch reimport maintains scroll settings
Add import support for flipped layers in Sketch
Components can be inserted from the insert menu
Resize components better when component's artboard size changes.
Improved Sketch import of blurred layers
Clicking event popup shows hint that you need to drag
Improved cmd-click and double-click layer selection
New layers are given a random color
Color picker defaults focus to the hex field for quick copy and paste of hex values
Ungrouping will select the newly ungrouped layers
Copying and pasting a layer will also copy and paste the events on it
Principle will pan to the selected layer if it is out of view
Rewinding preview restarts video layers
Improved copy/paste performance
Events arrows are more tightly packed
When the stroke color is changed, stroke width will be set to 1 if it is 0
Changing font size will resize the text layer to fit.
Show that the animation and drivers operate on the center X and Y of a layer
Export for mac now exports to the current file's directory
Events are now created directly on components, instead of a group around the component
Alt+dragging a layer to a new artboard will keep its old name
Improved performance for files that use a lot of fonts
Smaller files sizes for files that use a lot of components
Resizing component's artboard better resizes all instances of the components
Fixed components sometimes pasting incorrectly
Fixed preview window shadow
Fixed preview window capturing keyboard events when mouse was over it
Fixed playback bugs relating to components
Fixed a bug that misplaced recently-detached components
Fixed bug causing preview window to disappear when dragged to secondary monitor
Fixed a bug that showed animating layers even when all animations were turned off in a transition
Fixed bug causing the preview window to show shadows with double the radius it should have
Fixed a bug that allowed adding layers incorrectly to component instances
Fixed a bug that didn't restart auto animations when the preview was rewound
Fixed a bug causing inspector field stepper buttons to resize incorrectly
Fixed a bug that created multiple copies of a layer dragged in from Sketch
Fixed a bug causing Principle to use component artboard size for new files
Fixed Sketch import failing when the Sketch file was corrupted
Fix a crash when zooming in really far in the canvas
Fix bug that occasionally caused canvas to pan after box selecting
Screenshot：
System requirements：
- OS X 10.7 or Later
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