WCF，WebAPI，WCFREST和WebService的区别
Web Service
It is based on SOAP and return data in XML form.
It support only HTTP protocol.
It is not open source but can be consumed by any client that understands xml.
It can be hosted only on IIS.
WCF
It is also based on SOAP and return data in XML form.
It is the evolution of the web service(ASMX) and support various protocols like TCP, HTTP, HTTPS, Named Pipes, MSMQ.
The main issue with WCF is, its tedious and extensive configuration.
It is not open source but can be consumed by any client that understands xml.
It can be hosted with in the applicaion or on IIS or using window service.
WCF Rest
To use WCF as WCF Rest service you have to enable webHttpBindings.
It support HTTP GET and POST verbs by [WebGet] and [WebInvoke] attributes respectively.
To enable other HTTP verbs you have to do some configuration in IIS to accept request of that particular verb on .svc files
Passing data through parameters using a WebGet needs configuration. The UriTemplate must be specified
It support XML, JSON and ATOM data format.
Web API
This is the new framework for building HTTP services with easy and simple way.
Web API is open source an ideal platform for building REST-ful services over the .NET Framework.
Unlike WCF Rest service, it use the full featues of HTTP (like URIs, request/response headers, caching, versioning, various content formats)
It also supports the MVC features such as routing, controllers, action results, filter, model binders, IOC container or dependency injection, unit testing that makes it more simple and robust.
It can be hosted with in the application or on IIS.
It is light weight architecture and good for devices which have limited bandwidth like smart phones.
Responses are formatted by Web API’s MediaTypeFormatter into JSON, XML or whatever format you want to add as a MediaTypeFormatter.
To whom choose between WCF or WEB API
Choose WCF when you want to create a service that should support special scenarios such as one way messaging, message queues, duplex communication etc.
Choose WCF when you want to create a service that can use fast transport channels when available, such as TCP, Named Pipes, or maybe even UDP (in WCF 4.5), and you also want to support HTTP when all other transport channels are unavailable.
Choose Web API when you want to create a resource-oriented services over HTTP that can use the full features of HTTP (like URIs, request/response headers, caching, versioning, various content formats).
Choose Web API when you want to expose your service to a broad range of clients including browsers, mobiles, iphone and tablets.
Adobe premiere pro cc简单基础教程
Premiere Pro是视频编辑爱好者和专业人士准备的必不可少的编辑工具。它可以提升您的创作能力和创作自由度，它是易学、高效、精确的视频剪辑软件。Premiere提供了采集、剪辑、调色、美化音频、字幕添加、输出、DVD刻录的一整套流程，并和其他Adobe软件高效集成，使您足以完成在编辑、制作、工作流上遇到的所有挑战，满足您创建高质量作品的要求。
方法/步骤
点击文件→新建→项目
编辑项目名称，这里小编建议设置一个新的文件目录（方便查找）
点击选择文件夹完成选项
点击确定完成创建
点文件→保存或Ctrl+S保存项目
根据第三步创建的文件夹找到项目文件（双击可以打开）
或者打开文件→打开项目
点击打开
ios calayer的动画 怎么延时
ios calayer的动画延时是通过UIView animateWithDuration设置delay参数实现的。
具体代码如下：
[UIView animateWithDuration:element.duration
delay:element.delay
options:UIViewAnimationOptionCurveLinear
animations:^{
//设置动画属性
}
} completion:^(BOOL finished){
// 重置开始时间
//当暂停启动后，重新设置启动时间。
**self.layer.beginTime = 0.0f;**
}];
-vice
在ios4.0及以后鼓励使用animateWithDuration方法来实现动画效果。
函数原型：
+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations + (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion + (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion
-c
参数说明：
duration为动画持续的时间。
animations为动画效果的代码块。
下面是可以设置动画效果的属性：
frame
bounds
center
transform
alpha
backgroundColor
contentStretch
例如一个视图淡出屏幕，另外一个视图出现的代码：
[UIView animateWithDuration:1.0 animations:^{ firstView.alpha = 0.0; secondView.alpha = 1.0; }];
-vice
completion为动画执行完毕以后执行的代码块
options为动画执行的选项。可以参考这里
delay为动画开始执行前等待的时间
