1_復(fù)制字符串到剪貼板

UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
    pasteboard.string = self.label.text;

2_滑動(dòng)的時(shí)候隱藏navigation bar

navigationController.hidesBarsOnSwipe = Yes;

3_消除導(dǎo)航條返回鍵帶的title

[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60)
forBarMetrics:UIBarMetricsDefault];

4_將Navigationbar變成透明而不模糊

[self.navigationController.navigationBar setBackgroundImage:[UIImage new]
forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar .shadowImage = [UIImage new];
self.navigationController.navigationBar .translucent = YES;

5_Navigation bar滑動(dòng)返回導(dǎo)航欄隱藏和顯示

//隱藏
- (void)viewWillAppear:(BOOL)animated{

    [super viewWillAppear:animated];

    [self.navigationController setNavigationBarHidden:YES animated:animated];

    // [self.navigationController setNavigationBarHidden:YES animated:YES];//帶動(dòng)畫結(jié)果      在切換tabBar的時(shí)候viewController會(huì)有閃動(dòng)的效果不建議這樣寫
   // self.navigationController.navigationBar.hidden = YES;//這種也是一樣用戶體驗(yàn)非常不好

}

//顯示
- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [self.navigationController setNavigationBarHidden:NO animated:animated];
}

6_怎么在xib和sb上使UIlabel、UIButton自適應(yīng)大小

    設(shè)置約束是、只設(shè)置其相對(duì)父控件的位置。不設(shè)置其自身的寬高。再點(diǎn)Update Frames即可。

7_用枚舉表示狀態(tài)、選項(xiàng)、狀態(tài)碼（類似Switch中使用等等）

  項(xiàng)目中盡量不要使用0,1,2...去表示不同的意思。看上去也比較費(fèi)解。
 應(yīng)該：
    typedef NS_ENUM(NSInteger, UserType) {
        /**
         *  游客
         */
        UserType_Tourist,
        /**
         *  導(dǎo)游
         */
        UserType_Guider,
    };

或者NS_OPTIONS