在使用TableView设置Cell数据时,如果需要根据条件判断赋值,避免每一次设置都进行判断,消耗CPU,可以将判断的操作放在模型中进行

以新浪微博公共消息为例(存放公共微博信息的模型(原创微博))

class JSUserInfoModel: NSObject {
    
    //微博ID
    var id: Int = 0
    //用户昵称
    var screen_name: String?
    
    //友好显示名称
    var name: String?
    //用户头像地址（中图），50×50像素
    var profile_image_url: String?
    
    // 是否是微博认证用户，即加V用户，true：是，false：否
    var verified: Int = 0
    
    // 认证类型，-1：没有认证，0，认证用户，2,3,5: 企业认证，220: 达人
    var verified_type: Int = 0{
        didSet{
            verified_type_img = setImg_Verified_type(verified_type)
        }
    }
    // 会员等级 0-6
    var mbrank: Int = 0 {
        didSet{
            mbrank_img = setImg_Mbrank(mbrank)
        }
    }
    
    var verified_type_img: UIImage?
    var mbrank_img: UIImage?
    
    //设置会员等级图片
    private func setImg_Mbrank (mbrank: Int) -> UIImage? {
        
        if mbrank > 0 && mbrank < 7 {
            
            return UIImage(named: "common_icon_membership_level\(mbrank)")
        }else {
            
            return UIImage(named: "common_icon_membership_expired")
        }
    }
    //设置认证图片
    private func setImg_Verified_type (verified_type: Int) -> UIImage? {
        
        switch verified_type {
        case 0:
            return UIImage(named: "avatar_vip")
        case 2,3,5:
            return UIImage(named: "avatar_enterprise_vip")
        case 220:
            return UIImage(named: "avatar_grassroot")
        default:
            return nil
        }
    }
    
    init(dict: [String: AnyObject]) {
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {
        
    }
    
}

weibo_public_message.png