RCCallPlusRenderMode

视频帧通过保持宽高比(可能显示黑色边框)来缩放以适应视图的大小

视频帧被缩放以填充视图的大小保持长宽比。视频帧的某些部分可能是剪

视频帧将填充到在保持宽高比的约束下

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Returns an array containing the constants of this enum type, in the order they're declared. This method may be used to iterate over the constants.