swift 一些技巧总结

最新推荐文章于 2025-03-18 13:15:51 发布

原创最新推荐文章于 2025-03-18 13:15:51 发布 · 462 阅读

0 ·

CC 4.0 BY-SA版权

swift 专栏收录该内容

16 篇文章

订阅专栏

oc混编

-SmartHome-Bridging-Header.h
-#import "SmartHome-Swift.h"

定义类

class WeatherModel  {
    var address:String=""
     init(address:String) {
        self.address=address
      }
   }

闭包

 typealias Complete = (WeatherModel?) -> ()
func weatherWithProvince(localCity:String,complete:Complete){    
// 。。。。
   complete(weather)
// 。。。。
}

延展

 extension AppDelegate{
    func dosth()
    {
    //to do
    } 
}

懒加载

    lazy var btn:UIButton = {
       let _btn = UIButton(frame: CGRectMake( 0,0,0,0))
       _btn.setImage(voiceIconSelected, forState: UIControlState.Normal)
       _btn.backgroundColor = UIColor.whiteColor()
       _btn.layer.cornerRadius = 19
       _btn.layer.masksToBounds = true
       _btn.layer.borderWidth = 1.0
       _btn.layer.borderColor = mainColor.CGColor

      return _btn;

    }()

重写get set方法实现联动效果

    var _currentTemp: Int = 18
    var currentTemp:Int{
        get{
        return _currentTemp
        }
        set {
            if(newValue > 14 && newValue < 36){
            _currentTemp = newValue
            self.cm.temp = _currentTemp
           print("Recived new value", newValue)
           self.leb.setTitle("\(_currentTemp)°", forState: UIControlState.Normal)
            self.smallProgress!.progress = CGFloat( _currentTemp - 15 ) / 21.0;
            }

        }
    }

单例

   class MyLocationManager{

    class func sharedManager()->MyLocationManager{
        struct YRSingleton{
            static var sharedAccountManagerInstance:MyLocationManager? = nil;
            static var predicate:dispatch_once_t = 0
        }
       dispatch_once(&YRSingleton.predicate,{
        YRSingleton.sharedAccountManagerInstance = MyLocationManager()
        })

        return YRSingleton.sharedAccountManagerInstance!
    }
}

转json字符串

 func toJSONString(jsonSource: AnyObject) -> String {
        var data = NSData()
        do {
            try data = NSJSONSerialization.dataWithJSONObject(jsonSource, options: NSJSONWritingOptions.PrettyPrinted)
        } catch let error as NSError {
            print(error)
        }
        let strJson = String(data: data, encoding: NSUTF8StringEncoding)
        return strJson!
    }