互动白板

@property (copy, nonatomic) NSString *ratio;

默认白板宽高比，可传格式如“4:3”、“16:9”的字符串，默认“16:9”

@property (assign, nonatomic) UInt32 scale;

白板默认缩放系数，实际缩放倍数为 scale/100,默认为100

@property (assign, nonatomic) ARBoardToolType toolType;

白板工具，默认 ARBoardToolTypeFree_draw,详见ARBoardToolType

@property (nonatomic, assign) UInt64 imageResourceTimeout;

单位毫秒，默认 30000 毫秒

白板常规配置项