# TencentLBSGeofenceCircleRegion Class Reference

Inherits from | TencentLBSGeofenceRegion : NSObject
Declared in | TencentLBSGeofenceRegion.h

## Overview

圆形地理围栏区域，由中心坐标和半径定义。

### `radius`

圆形围栏的半径，单位为米

`@property (nonatomic, assign, readonly) CLLocationDistance radius`

#### Declared In

`TencentLBSGeofenceRegion.h`

### `– initWithCenter:radius:identifier:`

创建圆形围栏区域

`- (nullable instancetype)initWithCenter:(CLLocationCoordinate2D)center radius:(CLLocationDistance)radius identifier:(NSString *)identifier`

#### Parameters

`center` | 围栏中心坐标
`radius` | 围栏半径，单位为米，必须大于 0
`identifier` | 围栏的唯一标识符，不能为 nil 或空字符串

#### Return Value

圆形围栏实例，参数无效时返回 nil

#### Discussion

创建圆形围栏区域

#### Declared In

`TencentLBSGeofenceRegion.h`