iOS 统一配置

1 、统一设置nav标题样式：

- (void)_setNavigationTitle {
    NSDictionary *navigationParams = @{NSForegroundColorAttributeName:[UIColor whiteColor],NSFontAttributeName:[UIFont fontWithName:@"FZLBJW--GB1-0" size:]};
    [[UINavigationBar appearance]setTitleTextAttributes:navigationParams];
}

2 、统一设置nav相关颜色：

- (void)_setNavigationColor {
    [[UINavigationBar appearance] setBarTintColor:[UIColor whiteColor]];
    [[UINavigationBar appearance] setTitleTextAttributes:@{NSFontAttributeName:[UIFont fontWithName:@"FZLBJW--GB1-0" size:],NSForegroundColorAttributeName:[UIColor blackColor]}];
    [[UINavigationBar appearance] setTintColor:[UIColor blackColor]];
}

3 、统一设置返回按钮：

- (void)_setNavigationBackItem {
    UINavigationBar * navigationBar = [UINavigationBar appearance];
    UIImage *image = [UIImage imageNamed:@"back"];
    image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    navigationBar.backIndicatorImage = image;
    navigationBar.backIndicatorTransitionMaskImage = image;
    UIBarButtonItem *buttonItem = [UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil];
    UIOffset offset;
    offset.horizontal = - ;
    offset.vertical =  ;//不为0在iOS11会造成视图错乱
    [buttonItem setBackButtonTitlePositionAdjustment:offset forBarMetrics:UIBarMetricsDefault];
}

4 、统一设置tableViewCell的分割线：

- (void)_setTableViewAppearace {
    [[UITableView appearance]setTableFooterView:[UIView new]];
    [[UITableView appearance]setSeparatorInset:UIEdgeInsetsZero];
}

5 、统一设置SegmentedControl

    UISegmentedControl *appearance = [UISegmentedControl appearance];  

    //Segmenteg正常背景
    [appearance setBackgroundImage:[UIImage imageNamed:@"Segmente.png"]
                          forState:UIControlStateNormal
                        barMetrics:UIBarMetricsDefault];  

    //Segmente选中背景
    [appearance setBackgroundImage:[UIImage imageNamed:@"Segmente_a.png"]
                          forState:UIControlStateSelected
                        barMetrics:UIBarMetricsDefault];  

    //Segmente左右都未选中时的分割线
    //BarMetrics表示navigation bar的状态，UIBarMetricsDefault 表示portrait状态（44pixel height），UIBarMetricsLandscapePhone 表示landscape状态（32pixel height）  

    [appearance setDividerImage:[UIImage imageNamed:@"Segmente_line.png"]
            forLeftSegmentState:UIControlStateNormal
              rightSegmentState:UIControlStateNormal
                     barMetrics:UIBarMetricsDefault];  

    [appearance setDividerImage:[UIImage imageNamed:@"Segmente_line.png"]
            forLeftSegmentState:UIControlStateSelected
              rightSegmentState:UIControlStateNormal
                     barMetrics:UIBarMetricsDefault];  

    [appearance setDividerImage:[UIImage imageNamed:@"Segmente_line.png"]
            forLeftSegmentState:UIControlStateNormal
              rightSegmentState:UIControlStateSelected
                     barMetrics:UIBarMetricsDefault];  

    //字体
    NSDictionary *textAttributes1 = @{UITextAttributeFont: [UIFont systemFontOfSize:],
                                     UITextAttributeTextColor: [UIColor blueColor],
                                     UITextAttributeTextShadowColor: [UIColor whiteColor],
                                     UITextAttributeTextShadowOffset: [NSValue valueWithCGSize:CGSizeMake(, )]};  

    [appearance setTitleTextAttributes:textAttributes1 forState:];  

    NSDictionary *textAttributes2 = @{UITextAttributeFont: [UIFont systemFontOfSize:],
                                     UITextAttributeTextColor: [UIColor whiteColor],
                                     UITextAttributeTextShadowColor: [UIColor blackColor],
                                     UITextAttributeTextShadowOffset: [NSValue valueWithCGSize:CGSizeMake(, )]};  

    [appearance setTitleTextAttributes:textAttributes2 forState:]; 

6 、统一设置BarButton

    //修改导航条上的UIBarButtonItem
    UIBarButtonItem *appearance = [UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil nil];  

    //设置导航栏的字体包括backBarButton和leftBarButton，rightBarButton的字体
    NSDictionary *textAttributes = @{UITextAttributeFont: [UIFont systemFontOfSize:],
                                     UITextAttributeTextColor: [UIColor blueColor],
                                     UITextAttributeTextShadowColor: [UIColor whiteColor],
                                     UITextAttributeTextShadowOffset: [NSValue valueWithCGSize:CGSizeMake(, )]};  

    [appearance setTitleTextAttributes:textAttributes forState:];//forState为0时为下正常状态，为1时为点击状态。  

    //修改leftBarButton，rightBarButton背景效果
    [appearance setBackgroundImage:[UIImage imageNamed:@"navBarButton.png"]
                          forState:UIControlStateNormal
                             style:UIBarButtonItemStyleBordered
                        barMetrics:UIBarMetricsDefault];  

    [appearance setBackgroundImage:[UIImage imageNamed:@"navBarButton_a.png"]
                          forState:UIControlStateHighlighted
                             style:UIBarButtonItemStyleBordered
                        barMetrics:UIBarMetricsDefault];  

    //backBarButton需要单独设置背景效果。只能在ios6.0以后才能用
    [appearance setBackButtonBackgroundImage:[UIImage imageNamed:@"nav_bg.png"]
                                    forState:
                                  barMetrics:UIBarMetricsDefault];  

    [appearance setBackButtonBackgroundImage:[UIImage imageNamed:@"work.png"]
                                    forState:
                                  barMetrics:UIBarMetricsDefault];  

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

7 、统一设置工具栏：

 UIToolbar *appearance = [UIToolbar appearance];
    //样式和背景二选一即可，看需求了
    //样式（黑色半透明，不透明等）设置
    [appearance setBarStyle:UIBarStyleBlackTranslucent];
    //背景设置
    [appearance setBackgroundImage:[UIImage imageNamed:@"toolbarBg.png"]
                forToolbarPosition:UIToolbarPositionAny
                        barMetrics:UIBarMetricsDefault];  

8 、统一设置系统View的tintColor：

关于tintColor的介绍请移步：https://www.jianshu.com/p/4bcaf6349133

        UIView.appearance().tintColor = UIColor(named: "Deep Carmine Pink")

你会发现系统默认的颜色从蓝色变为了 Deep Carmine Pink！（backBarItem也是红色只是被覆盖层改变了）