[翻译] MotionBlur

MotionBlur

https://github.com/fastred/MotionBlur

MotionBlur allows you to add motion blur effect to your animations (currently only position‘s change). See the accompanying blog post to learn how it‘s implemented.

MotionBlur允许你添加动态模糊特效(目前只支持位移变化).你可以看这篇博文来看看是怎么实现的.

Note how the text and icons on the menu get blurred when it slides in and out.

注意看,这个文字以及图片会在滑入或者滑出的时候变得模糊了.

Usage

First, import it with:

首先,导入头文件:

#import "UIView+MotionBlur.h"

then use it with:

然后这么用:

[yourView enableBlurWithAngle:M_PI_2 completion:^{
    [UIView animateWithDuration:0.5
                          delay:0
         usingSpringWithDamping:0.8
          initialSpringVelocity:0.3
                        options:UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionBeginFromCurrentState
                     animations:^{

        CGRect f = yourView.frame;
        f.origin = CGPointMake(0, 300);
        yourView.frame = f;
    } completion:^(BOOL finished) {
        [yourView disableBlur];
    }];
}];

Snapshot and blur are computed before the animation, that‘s why the API is asynchronous. You should also see the example project and read comments in the header file:Classes/UIView+MotionBlur.h.

截图以及模糊会在动画执行前就计算好了.所以,这是这个API为什么是异步的.你可以查看头文件来了解详情.

Demo

To run the example project; clone the repo and open Example/MotionBlur.xcodeproj.

Requirements

• iOS 8 and above

Installation

MotionBlur is available through CocoaPods. To install it, simply add the following line to your Podfile:

MotionBlur支持CocoaPods.

pod "MotionBlur"

Author

Arkadiusz Holko:

• Blog
• @arekholko on Twitter

[翻译] MotionBlur

原文：http://www.cnblogs.com/YouXianMing/p/4579202.html