Snippet

alpha.m

switch (scope) {
        case 0:
            if (maskTime >= 0) {
                // 日出
                if (_ispanGesture) {
                    _imageLayer0.alpha = ((float)(perTime - abs(maskTime)))/perTime;
                    _imageLayer1.alpha = 1;
                }else{
                    [self setimageLayer:_imageLayer0 byAlpha:((float)(perTime - abs(maskTime)))/perTime];
                    [self setimageLayer:_imageLayer1 byAlpha:1];
                }
                _imageLayer2.alpha = 0;
                _imageLayer3.alpha = 0;
                _imageLayer4.alpha = 0;
                _imageLayer5.alpha = 0;
            }else{
                // 日出前
                _imageLayer0.alpha = 0;
                _imageLayer1.alpha = 0;
                _imageLayer2.alpha = 0;
                _imageLayer3.alpha = 0;
                _imageLayer4.alpha = 0;
                if (_ispanGesture) {
                    _imageLayer5.alpha = ((float)abs(maskTime))/perTime;
                }else{
                    [self setimageLayer:_imageLayer5 byAlpha:((float)abs(maskTime))/perTime];
                }
            }
            break;
        case 1:
            // 上午
            _imageLayer0.alpha = 0;
            if (_ispanGesture) {
                _imageLayer1.alpha = ((float)(perTime - abs(maskTime)))/perTime;
                _imageLayer2.alpha = 1;
            }else{
                [self setimageLayer:_imageLayer1 byAlpha:((float)(perTime - abs(maskTime)))/perTime];
                [self setimageLayer:_imageLayer2 byAlpha:1];
            }
            _imageLayer3.alpha = 0;
            _imageLayer4.alpha = 0;
            _imageLayer5.alpha = 0;
            break;
        case 2:
            // 中午
            _imageLayer0.alpha = 0;
            _imageLayer1.alpha = 0;
            
            if (_ispanGesture) {
                _imageLayer2.alpha = ((float)(perTime - abs(maskTime)))/perTime;
                _imageLayer3.alpha = 1;
            }else{
                [self setimageLayer:_imageLayer2 byAlpha:((float)(perTime - abs(maskTime)))/perTime];
                [self setimageLayer:_imageLayer3 byAlpha:1];
            }
            _imageLayer4.alpha = 0;
            _imageLayer5.alpha = 0;
            break;
        case 3:
            // 下午
            _imageLayer0.alpha = 0;
            _imageLayer1.alpha = 0;
            _imageLayer2.alpha = 0;
            if (_ispanGesture) {
                _imageLayer3.alpha = ((float)(perTime - abs(maskTime)))/perTime;
                _imageLayer4.alpha = 1;
            }else{
                [self setimageLayer:_imageLayer3 byAlpha:((float)(perTime - abs(maskTime)))/perTime];
                [self setimageLayer:_imageLayer4 byAlpha:1];
            }
            _imageLayer5.alpha = 0;
            break;
        case 4:
            // 傍晚
            _imageLayer0.alpha = 0;
            _imageLayer1.alpha = 0;
            _imageLayer2.alpha = 0;
            _imageLayer3.alpha = 0;
            if (_ispanGesture) {
                _imageLayer4.alpha = ((float)(perTime - abs(maskTime)))/perTime;
                _imageLayer5.alpha = 1;
            }else{
                [self setimageLayer:_imageLayer4 byAlpha:((float)(perTime - abs(maskTime)))/perTime];
                [self setimageLayer:_imageLayer5 byAlpha:1];
            }
            break;
        case 5:
            // 日落后
            _imageLayer0.alpha = 0;
            _imageLayer1.alpha = 0;
            _imageLayer2.alpha = 0;
            _imageLayer3.alpha = 0;
            _imageLayer4.alpha = 0;
            if (_ispanGesture) {
                _imageLayer5.alpha = 1;
            }else{
                [self setimageLayer:_imageLayer5 byAlpha:1];
            }
            break;
        default:
            // 第二天日出前
            if(rangeTime > (dayTime + (nightTime - perTime))){
            _imageLayer0.alpha = 0;
            _imageLayer1.alpha = 0;
            _imageLayer2.alpha = 0;
            _imageLayer3.alpha = 0;
            _imageLayer4.alpha = 0;
                if (_ispanGesture) {
                    _imageLayer5.alpha = ((float)(perTime - (rangeTime - (dayTime + (nightTime - perTime)))))/perTime;
                }else{
                    [self setimageLayer:_imageLayer5 byAlpha:((float)(perTime - (rangeTime - (dayTime + (nightTime - perTime)))))/perTime];
                }
                break;
            }else{
                _imageLayer0.alpha = 0;
                _imageLayer1.alpha = 0;
                _imageLayer2.alpha = 0;
                _imageLayer3.alpha = 0;
                _imageLayer4.alpha = 0;
                if (_ispanGesture) {
                    _imageLayer5.alpha = 1;
                }else{
                    [self setimageLayer:_imageLayer5 byAlpha:1];
                }
            }
    }