Swift 从零开始 01_单例

Swift单例的写法

需要对单例的属性做修改

static let shareInstance: HTTPClient = {

    let afn = HTTPClient()
    
    // 设置网络请求的 content-type: text/plain
    
    afn.responseSerializer.acceptableContentTypes?.insert("text/plain")
    
    return afn
}()

不需要对单例的属性做修改

static let sharedInstance = TCPManager()