从BiliBili开源代码看到自己的不足

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1.注释明晰

/** 来疯直播Session */
@property (nonatomic, strong) LFLiveSession *session;

/** 覆盖层View */
@property (weak, nonatomic) IBOutlet UIView *overlayView;

/** 头像imageView */
@property (weak, nonatomic) IBOutlet UIImageView *iconImageView;

/** 标题标签 */
@property (weak, nonatomic) IBOutlet UILabel *titleLabel;

/** 直播状态标签 */
@property (weak, nonatomic) IBOutlet UILabel *liveStatusLabel;

/** 开始直播按钮 */
@property (weak, nonatomic) IBOutlet UIButton *startLiveBtn;

/** 相机按钮 */
@property (weak, nonatomic) IBOutlet UIButton *cameraBtn;

/** 美颜按钮 */
@property (weak, nonatomic) IBOutlet UIButton *beautyBtn;

/** 我是灯泡 []~(￣▽￣)~* */
@property (weak, nonatomic) IBOutlet UIButton *lightBtn;

/** 灯泡状态,默认为关闭 */
@property (nonatomic) AVCaptureTorchMode torchMode;

/** 我是镜子 []~(￣▽￣)~* */
@property (weak, nonatomic) IBOutlet UIButton *mirrorBtn;

2.多情况判断枚举

typedef NS_ENUM(NSInteger, AVAuthorizationStatus) {
    AVAuthorizationStatusNotDetermined = 0,
    AVAuthorizationStatusRestricted,
    AVAuthorizationStatusDenied,
    AVAuthorizationStatusAuthorized
} NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;

switch (status) {
        case AVAuthorizationStatusNotDetermined: {
            // 许可对话没有出现，发起授权许可
            [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
                if (granted) {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        @strongify(self);
                        [self.session setRunning:YES];
                    });
                }
            }];
            break;
        }
        case AVAuthorizationStatusAuthorized: {
            // 已经开启授权，可继续
            dispatch_async(dispatch_get_main_queue(), ^{
                @strongify(self);
                [self.session setRunning:YES];
            });
            break;
        }
        case AVAuthorizationStatusDenied:
        case AVAuthorizationStatusRestricted:
            // 用户明确地拒绝授权，或者相机设备无法访问
            
            break;
        default:
            break;
    }

4.自定义打印

#define YPLog(FORMAT, ...) fprintf(stderr, "[%s:%d行] %s\n", [[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);

5.自定义常用语句和常用配置

#define YPNotificationCenter [NSNotificationCenter defaultCenter]
#define YPUserDefaults [NSUserDefaults standardUserDefaults]
#define YPApplication [UIApplication sharedApplication]
#define YPFileManager [NSFileManager defaultManager]
#define YPDevice [UIDevice currentDevice]
/**
*颜色
*/
#define YPBlackColor [UIColor blackColor]
#define YPBlueColor [UIColor blueColor]
#define YPRedColor [UIColor redColor]
#define YPWhiteColor [UIColor whiteColor]
/**
*随机色和RGB
*/
/** RGB颜色 */
#define YPColor_RGB(r, g, b) [UIColor colorWithRed:(r) / 255.0 green:(g) / 255.0 blue:(b) / 255.0 alpha:1.0]
#define YPColor_RGBA(r, g, b, a) [UIColor colorWithRed:(r) / 255.0 green:(g) / 255.0 blue:(b) / 255.0 alpha:(a)]
#define YPColor_RGBA_256(r, g, b, a) [UIColor colorWithRed:(r) / 255.0 green:(g) / 255.0 blue:(b) / 255.0 alpha:(a) / 255.0]
/** 随机色 */
#define YPRandomColor_RGB YPColor_RGB(arc4random_uniform(256), arc4random_uniform(256), arc4random_uniform(256))
#define YPRandomColor_RGBA YPColor_RGBA_256(arc4random_uniform(256), arc4random_uniform(256), arc4random_uniform(256), arc4random_uniform(256))

6.判断设备类型

#define iPHone6Plus ([UIScreen mainScreen].bounds.size.height == 736) ? YES : NO

#define iPHone6 ([UIScreen mainScreen].bounds.size.height == 667) ? YES : NO

#define iPHone5 ([UIScreen mainScreen].bounds.size.height == 568) ? YES : NO

#define iPHone4 ([UIScreen mainScreen].bounds.size.height == 480) ? YES : NO

7.屏幕尺寸相关

/** 屏幕 */
#define YPScreen [UIScreen mainScreen]
/** 屏幕宽度 */
#define YPScreenW [UIScreen mainScreen].bounds.size.width
/** 屏幕高度 */
#define YPScreenH [UIScreen mainScreen].bounds.size.height
/** 屏幕bounds */
#define YPScreenBounds [UIScreen mainScreen].bounds
/** 屏幕伸缩度（Retina时值为2,非Retina值为1）*/
#define YPScreenScale [UIScreen mainScreen].scale

8.系统其它高度设置

---

/** 系统状态栏高度 */
UIKIT_EXTERN CGFloat const kAppStatusBarHeight;
/** 系统导航栏高度 */
UIKIT_EXTERN CGFloat const kAppNavigationBarHeight;
/** 系统tabbar高度 */
UIKIT_EXTERN CGFloat const kAppTabBarHeight;

9.善于使用Layer

// containerView
    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, YPScreenW, self.containerView.height) byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(8, 8)];
    CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
    maskLayer.frame = CGRectMake(0, 0, YPScreenW, self.containerView.height);
    maskLayer.path = maskPath.CGPath;
    self.containerView.layer.mask = maskLayer;

10.善于使用分类扩展方法

 // 我要直播按钮
    [[_phoneLiveBtn rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(id x) {
        @strongify(self);
        // 跳转到手机直播控制器
        [self.navigationController pushViewController:[YPPhoneLiveViewController controller] animated:YES];
    }];

11.拦截push事件

/**
 * 可以在这个方法中拦截所有push进来的控制器
 */
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if (self.childViewControllers.count > 0) { // 如果push进来的不是第一个控制器
        
        if ([viewController isKindOfClass:NSClassFromString(@"YPBilibiliWebViewController")]) {
            UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
            button.titleLabel.font = [UIFont boldSystemFontOfSize:17];
            button.contentEdgeInsets = UIEdgeInsetsMake(0, -10, 0, 0);
            [button setTitle:@"返回" forState:UIControlStateNormal];
            [button sizeToFit];
            [button setTitleColor:YPMainColor forState:UIControlStateNormal];
            [button setTitleColor:YPMainColor forState:UIControlStateHighlighted];
            @weakify(self);
            [[button rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(id x) {
                @strongify(self);
                [self popViewControllerAnimated:YES];
            }];
            
            viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
        }
        

        // 隐藏tabbar
        viewController.hidesBottomBarWhenPushed = YES;
    }
    
    // 这句super的push要放在后面, 让viewController可以覆盖上面设置的leftBarButtonItem
    [super pushViewController:viewController animated:animated];
    
}

12.善于封装方法

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.delegate = self;
    
    self.tabBar.tintColor = YPMainColor;
    
    [self addChildVc:[YPHomeController controller] andTitle:@"首页" andImage:@"home_home_tab" andSelectedImage:@"home_home_tab_s"];
    
    [self addChildVc:[YPProfileViewController controller] andTitle:@"我的" andImage:@"home_mine_tab" andSelectedImage:@"home_mine_tab_s"];
}

- (void)viewWillAppear:(BOOL)animated
{
    [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationFade];
}


#pragma mark - Private
- (void)addChildVc:(UIViewController*)childVc andTitle:(NSString*)title andImage:(NSString*)image andSelectedImage:(NSString*)selectedImage
{
    childVc.tabBarItem.title = title;
    
    childVc.tabBarItem.image = [[UIImage imageNamed:image] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
    childVc.tabBarItem.selectedImage = [[UIImage imageNamed:selectedImage] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
    
    YPNavigationController* nav = [[YPNavigationController alloc] initWithRootViewController:childVc];
    [self addChildViewController:nav];
}

13.善于封装ViewDidLoad中的工作

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // UI
    [self createUI];
    
    // Data
    [self loadData];
}

14.不避讳使用通知，该用则用.用则有良好封装

[[YPNotificationCenter rac_addObserverForName:kCycleBannerWillBeginDraggingNotification object:nil] subscribeNext:^(id x) {
        @strongify(self);
        self.contentTableView.scrollEnabled = NO;
    }];

15.将Xib约束拉出来，代码中灵活使用

_coverImageViewHeightCons.constant = height;
[self layoutIfNeeded];