用CGAffineTransformMakeRotation旋转横屏后，平移的问题，可以加这段代码

[Jijingcheng]

/**
拖动事件
@param pan 拖动手势
*/
-(void)dragAction:(UIPanGestureRecognizer *)pan{
if(self.dragEnable==NO)return;
switch (pan.state) {
case UIGestureRecognizerStateBegan:{//开始拖动
if (self.beginDragBlock) {
self.beginDragBlock(self);
}
//注意完成移动后，将translation重置为0十分重要。否则translation每次都会叠加
[pan setTranslation:CGPointZero inView:self];
//保存触摸起始点位置
self.startPoint = [pan translationInView:self];
break;
}

    case UIGestureRecognizerStateChanged:{//拖动中
        //计算位移 = 当前位置 - 起始位置
        if (self.duringDragBlock) {
            self.duringDragBlock(self);
        }
        CGPoint point = [pan translationInView:self];
        float dx;
        float dy;
        switch (self.dragDirection) {
            case WMDragDirectionAny:
            {
                if (self.isXuanHeng) {
                    dy = point.x - self.startPoint.x;
                    dx = self.startPoint.y - point.y;
                } else {
                    dx = point.x - self.startPoint.x;
                    dy = point.y - self.startPoint.y;
                }
            }
                break;
            case WMDragDirectionHorizontal:
                dx = point.x - self.startPoint.x;
                dy = 0;
                break;
            case WMDragDirectionVertical:
                dx = 0;
                dy = point.y - self.startPoint.y;
                break;
            default:
                dx = point.x - self.startPoint.x;
                dy = point.y - self.startPoint.y;
                break;
        }
        
        //计算移动后的view中心点
        CGPoint newCenter = CGPointMake(self.center.x + dx, self.center.y + dy);
        //移动view
        self.center = newCenter;
        
        //  注意完成上述移动后，将translation重置为0十分重要。否则translation每次都会叠加
        [pan setTranslation:CGPointZero inView:self];
        break;
    }
        
    case UIGestureRecognizerStateEnded:{//拖动结束
        [self keepBounds];
        if (self.endDragBlock) {
            self.endDragBlock(self);
        }
        break;
    }
    default:
        break;
}

}