如何做一款仿映客直播APP （Swift3.0版）

这里只做swfit更新的简单介绍 ！

具体详解：http://www.jianshu.com/p/b2674fc2ac35
源码地址：https://github.com/one-tea/ZKKLiveAPP_Swift3.0

项目变化简介:

• 使用swift3开发 与之前的swfit2相比有一些简化 具体参考
  Swift3.0新特性：http://www.cocoachina.com/swift/20160712/17028.html
• 使用网络请求简单封装
• 图片加载

1.网络请求

class ZKKNetRequest: NSObject {

      public class func get(_ url: String!, _ para: NSDictionary?, callBack: @escaping(_ data:Data? ,_ error:Error?) -> Void) -> Void{
        
        let  session = URLSession.shared
        
        let urlStr = NSMutableString.init(string: url)
        
        if let para = para {
            urlStr.append(encodeUniCode(parasToString(para) as NSString) as String)
        }
        
        var request = URLRequest(url: URL.init(string: urlStr as String)!)
        request.httpMethod = "GET"
        let dataTask = session.dataTask(with: request) { (data, responseObject, error) in

            guard let httpURLResponse = responseObject as? HTTPURLResponse, httpURLResponse.statusCode == 200,error == nil else{
                print("DataTask Error:\(error)")
                return
            }
            
            callBack(data, error);

        }
        
        dataTask.resume()
        
    }
    
    public class func post(_ url:String! , _ para:NSDictionary?, callBack: @escaping(_ data:Data? ,_ error : Error?) -> Void) -> Void{
    
        let  session = URLSession.shared;
        
        let urlStr = NSMutableString.init(string: url)
        if para != nil{
            
            urlStr.append(encodeUniCode(parasToString((para)!) as NSString) as String)

        }
        
        var request = URLRequest.init(url: URL.init(string: urlStr as String)!)
        request.httpMethod = "POST"
        let dataTask  = session.dataTask(with: request) { (data, responseObject, error) in
            
            guard let httpURLResponse = responseObject as? HTTPURLResponse, httpURLResponse.statusCode == 200, error == nil else{
            print("DataTask Error:\(error)")
            return
            }
            callBack(data,error)
        }
        
        dataTask.resume()
    
    }
    
    
    /* 特殊字符 */
    final class func encodeUniCode(_ string: NSString) ->NSString{
        
        return string.addingPercentEncoding(withAllowedCharacters: .urlFragmentAllowed)! as NSString
    }
    
    final class func parasToString (_ para:NSDictionary ) -> String {
        
        let paraString = NSMutableString.init(string: "?")
        for (key ,value) in para as! [String: String] {
            paraString.append("\(key)=\(value)&")
        }
        if paraString.hasSuffix("&"){
            paraString.deleteCharacters(in: NSMakeRange(paraString.length - 1, 1))
        }
        return String(paraString)
    }
}

2. 图片加载

    
        /* 加载 */
        
        DispatchQueue.global().async { 
            
            let request = URLRequest(url: URL.init(string: urlString as String)!)
            
            URLSession.shared.dataTask(with: request) { (data, response, error) in
                guard
                    let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
                    let mimeType = response?.mimeType, mimeType.hasPrefix("image"),
                    let data = data, error == nil,
                    let image = UIImage(data: data)
                    else { return }
                
                self.contentMode = UIViewContentMode.scaleToFill
                DispatchQueue.main.async(execute: {
                    self.image = image
                })
                }.resume()

            
        }
        /* 缓存后续在添加，当然无法与SDImage性能相媲美，等待稳定版本合适的第三方框架再用吧 */
        

• Cell特效

        cell.layer.transform = CATransform3DMakeScale(0.8, 0.8, 1)
        UIView.animate(withDuration: 0.8, animations: {
            cell.layer.transform = CATransform3DMakeScale(1, 1, 1)
        }, completion: nil)