WaveLoadingView

A loading indicator like water wave

###You can play a demo with appetize.io

#**Features：**

#**Property：** - cycle —— 循环次数，在控件宽度范围内，该正弦函数图形循环的次数，数值越大控件范围内看见的正弦函数图形周期数越多，波长约短波浪也越陡。 - term —— 正弦周期，在layoutSubviews中根据cycle重新计算，==修改无效== - phasePosition —— 正弦函数相位，==不可修改==，否则图形错乱 - amplitude —— 波幅，数值越大，波浪幅度越大，波浪越陡，反之越平缓，可通过代码调用`waveAmplitude`修改 - position —— 正弦曲线的X轴 相对于 控件Y坐标的位置，在-drawRect中通过progress计算，==修改无效== - waveMoveSpan —— 波浪移动的单位跨度，数值越大波浪移动越快，数值过大会出现不连续动画现象 - animationUnitTime —— 重画单位时间，数值越小，重画速度越快频率越大 - heavyColor —— demo中较深的绿色部分 - lightColor —— demo中较浅的绿色部分 - clipCircleColor —— 玻璃球边界颜色 - clipCircleLineWidth —— 玻璃球边线宽度，可通过代码调用`borderWidth`修改 - progressTextFontSize —— 中央进度提示百分比字号大小
#**Usage：** 1. include the file WaveLoadingView.swift to your project, and about objectiveC, you can create a bridge Header and import it 2. creat a waveLoadingIndicator instance ```swift let waveLoadingIndicator: WaveLoadingIndicator = WaveLoadingIndicator(frame: CGRectZero) ``` 3. add waveLoadingIndicator to your imageView, equal bounds here i do , and FlexibleWidth,height ```swift self.displayImageView.addSubview(self.waveLoadingIndicator) self.waveLoadingIndicator.frame = self.displayImageView.bounds self.waveLoadingIndicator.autoresizingMask = [.FlexibleWidth, .FlexibleHeight] ``` 4. and your can used combine with SDWebImage: ```swift self.displayImageView.sd_setImageWithURL(url, placeholderImage: nil, options: .CacheMemoryOnly, progress: { [weak self](receivedSize, expectedSize) -> Void in

guard let weakSelf = self else {
    return
}

weakSelf.waveLoadingIndicator.progress = Double(CGFloat(receivedSize)/CGFloat(expectedSize))
}) {
    [weak self](image, error, _, _) -> Void in
    // 不要忘记在完成下载回调中，移除waveLoadingIndicator
    guard let weakSelf = self else {
        return
    }
    
    weakSelf.waveLoadingIndicator.removeFromSuperview()

}

> <br>
> Don't worry， after -removeFromSuperview(), the animation have been stop
  
##Relation  
[@liuzhiyi1992](https://github.com/liuzhiyi1992) on Github  
[WaveLoadingIndicator](http://zyden.vicp.cc/waveloadingindicator/) in my Blog  


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#**License：** 
WaveLoadingIndicator is available under the MIT license. See the LICENSE file for more info.