踩坑记录

alamofire验证证书

故障现象：xcode log日志显示如下错误，并且相关请求出错

2019-07-17 11:38:19.396278+0800 Homecare[10181:3941027] CredStore - performQuery - Error copying matching creds.  Error=-25300, query={
    class = inet;
    "m_Limit" = "m_LimitAll";
    ptcl = htps;
    "r_Attributes" = 1;
    sdmn = Users;
    srvr = "cloud.demo.cn";
    sync = syna;
}

原因：ios系统验证网站的证书出错 （ps:不过不知道什么原因，这个故障是偶现的^）
处理：无条件信任我们自己的服务器，不需要进行证书校验

init() {
    //关闭认证
    let configuration = URLSessionConfiguration.default
    configuration.httpAdditionalHeaders = Alamofire.SessionManager.defaultHTTPHeaders
    configuration.urlCredentialStorage = nil
    
    let policies: [String: ServerTrustPolicy] = [
        "cloud.demo.cn": .disableEvaluation
    ]
    
    super.init(configuration: configuration,serverTrustPolicyManager: ServerTrustPolicyManager(policies: policies))
}

手动添加的自动布局代码不生效

let subView = UIView()
let left = NSLayoutConstraint(item: videoView, attribute: .left, relatedBy: .equal, toItem: view, attribute: .left, multiplier: 1, constant: 0)
let right = NSLayoutConstraint(item: videoView, attribute: .right, relatedBy: .equal, toItem: view, attribute: .right, multiplier: 1, constant: 0)
let top = NSLayoutConstraint(item: videoView, attribute: .top, relatedBy: .equal, toItem: view, attribute: .top, multiplier: 1, constant: 0)
let bottom = NSLayoutConstraint(item: videoView, attribute: .bottom, relatedBy: .equal, toItem: view, attribute: .bottom, multiplier: 1, constant: 0)
let constraints = [left, right, top, bottom]
NSLayoutConstraint.activate(constraints)

故障现象：运行的时候发现subview自动生成了midx=0,midy=0,height=0,width=0的约束代码
解决方案：关掉自动生成约束代码的功能

let subView = UIView()
subview.translatesAutoresizingMaskIntoConstraints = false
.......

ATS报错

故障现象：
app发送https://cloud.fanmiot.cn/rest/things请求，结果返回ats报错，日志如下：

2019-07-23 09:26:33.044872+0800 Homecare[5571:122357] Task <5547B0FE-DA52-400E-AF8E-D97453C9F2B0>.<1> finished with error - code: -1022
2019-07-23 09:26:33.046236+0800 Homecare[5571:122356] Task <5547B0FE-DA52-400E-AF8E-D97453C9F2B0>.<1> load failed with error Error Domain=NSURLErrorDomain Code=-1022 "The resource could not be loaded because the App Transport Security policy requires the use of a secure connection." UserInfo={NSLocalizedDescription=The resource could not be loaded because the App Transport Security policy requires the use of a secure connection., NSErrorFailingURLStringKey=http://undefined/rest/things, NSErrorFailingURLKey=http://undefined/rest/things, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <5547B0FE-DA52-400E-AF8E-D97453C9F2B0>.<1>"
), _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <5547B0FE-DA52-400E-AF8E-D97453C9F2B0>.<1>, NSUnderlyingError=0x600003f18b10 {Error Domain=kCFErrorDomainCFNetwork Code=-1022 "(null)"}} [-1022]

故障原因：
https://cloud.fanmiot.cn/rest/things不可达时，服务器端自动跳转到了http://undefined/rest/things页面……

视图不显示

故障现象：

class aViewController {
	override func viewDidLoad() {
    	super.viewDidLoad()
        
        let vc = bTabelViewController()
        view.addsubView(vc.view)
    }
}

问题原因：
vc是函数内的局部变量，函数执行结束就被释放掉了；bTabelViewController的cell是根据数据动态生成的；而这些数据也随着vc的释放而消失了……
所以需要将let vc = bTabelViewController() 移到函数外

在地图上画线，产生偏移

问题代码：

let startPoint = mapView.convert(start.coordinate, toPointTo: mapView)
let endPoint = mapView.convert(end.coordinate, toPointTo: mapView)
......
self.view.layer.addSublayer(lineLayer)

问题分析：
将经纬度转成view坐标是以mapview为参考，实际作用于view；所以当view和mapview不重合时就出现问题了,修正后代码：

let startPoint = mapView.convert(start.coordinate, toPointTo: view)
let endPoint = mapView.convert(end.coordinate, toPointTo: view)
......
self.view.layer.addSublayer(lineLayer)