项目开发笔记-2015.12.20-swift

来源：互联网发布：qq for mac 怎么解压编辑：程序博客网时间：2024/06/04 23:15

1、UITextField--设置为密码

2、获取UITextField的文本

UITextField.text String类型

        //文字超出文本框宽度，文字缩小        login_username.adjustsFontSizeToFitWidth = true;        //最小字体大小        login_username.minimumFontSize = 14;

3、判断String是否为空

String.isEmpty

4、对话框UIAlertController（UIAlertView可以舍去不用了）

    //提示框    func login_alert(message : String){        let Alert = UIAlertController(title: "提示", message: message, preferredStyle: UIAlertControllerStyle.Alert);        let ok = UIAlertAction(title: "确认", style: UIAlertActionStyle.Default, handler: nil);        Alert.addAction(ok);        self.presentViewController(Alert, animated: true, completion: nil);    }

5、网络访问

class NetWork{    static func request(method:String,url:String,        callback:(data:NSData!,resopnse:NSURLResponse!,error:NSError!)->Void){        let session = NSURLSession.sharedSession();        let request = NSMutableURLRequest(URL: NSURL(string: url)!);        request.HTTPMethod = method;        let task = session.dataTaskWithRequest(request, completionHandler:            {(data,response,error) -> Void in                callback(data: data, resopnse: response, error: error);            }        )        task.resume();    }        }

6、数据存储和取

class CommonMethod{        func saveTemporayData(TemporayDataValue:String,TemporayDataKey:String){        //利用NSUserDefaults        let temporaydata = NSUserDefaults.standardUserDefaults();        //存储数据        temporaydata.setObject(TemporayDataValue, forKey: TemporayDataKey);        //同步数据        temporaydata.synchronize();    }        func readTemporayData(TemporayDataKey:String) ->String{        let tempporaydata = NSUserDefaults.standardUserDefaults();        let data = tempporaydata.objectForKey(TemporayDataKey) as! String;        return data;    }    }

7.json解析

        NetWork.request("GET",url:url.get_network("username="+username_string+"&password="+password_string), callback: { (data, resopnse, error) -> Void in            do{                let json_b : AnyObject! = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments) as! NSDictionary;                if ((json_b.objectForKey("result") as? Int) == 0){                    self.commonMethod.saveTemporayData((json_b.objectForKey("token") as? String)!, TemporayDataKey: "token");                }else{                    self.login_alert((json_b.objectForKey("message") as? String)!);                }            }catch{                print("网络异常!");            }        });

但是我这里的

self.login_alert((json_b.objectForKey("message") as? String)!);

会报异常，由于第一次自己用swift做项目，暂时不晓得怎么改,你们谁晓得怎么修改的，求给个解答

0 0