iOS开发－基础框架

本基础框架主要包括UITabBarController，UINavigationController和UIBarButtonItem类的扩展。主要解决子视图创建过多，封装带有UINavigationController的子视图创建，然后添加到UITabBarController的ChildViewController视图中。针对UITabBarController的UITabBarItem的字体大小，颜色设置。废话不多说，上代码。

一.继承UITabBarController创建的NPTabBarController
1.设置tabbar上面的字体样式
#pragma mark - 设置tabbar上面的字 setTitleTextAttributes
- (void)setTabBarTitleAttributesStyle
{
NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
//通常字体大小
attrs[NSFontAttributeName] = [UIFont systemFontOfSize:16];
//通常字体颜色
attrs[NSForegroundColorAttributeName] = [UIColor lightGrayColor];

    NSMutableDictionary *selectAttrs = [NSMutableDictionary dictionary];
    //选中字体大小
    selectAttrs[NSFontAttributeName] = [UIFont systemFontOfSize:16];
    //选中字体颜色
    selectAttrs[NSForegroundColorAttributeName] = [UIColor darkGrayColor];
    
    //UI_APPEARANCE_SELECTOR 外观
    UITabBarItem *item = [UITabBarItem appearance];
    //tabbar通常字体样式
    [item setTitleTextAttributes:attrs forState:UIControlStateNormal];
    //tabbar选中字体样式
    [item setTitleTextAttributes:selectAttrs forState:UIControlStateSelected];
}

2.导航子视图封装
#pragma mark - 导航子视图封装
- (void)setChildVC:(UIViewController *)ChildVC title:(NSString *)title image:(NSString *)image selectImgage:(NSString *)selectImage {

    //注意视图层级关系，最上边时UINavigationController，创建一个视图即给一个UINavigationController
    NPNavigationController *nav = [[NPNavigationController alloc] initWithRootViewController:ChildVC];
    //子视图显示在UITabbarController上显示的tabbar标题
    nav.tabBarItem.title = title;
    //子视图显示在UITabbarController上未选中tabbar的图片
    nav.tabBarItem.image = [UIImage imageNamed:image];
    //子视图显示在UITabbarController上选中tabbar的图片
    nav.tabBarItem.selectedImage = [UIImage imageNamed:selectImage];
    //子视图背景颜色
    nav.view.backgroundColor = [UIColor grayColor];
    //注意标题显示是子视图的标题，非UINavigationController
    ChildVC.navigationItem.title = title;
    //添加子视图
    [self addChildViewController:nav];
    
}

二.继承UINavigationController创建NPNavigationController
1.重写-(void)pushVewController:(UIViewConntroller)viewCOntroller animated:(Bool)animated方法*
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
//判断self.childViewControllers是不是拿到所有子控制器，self.childViewControllers.count为0时，只有子控制器，干掉返回按钮
if (self.childViewControllers.count > 0) {
//自定义返回按钮
UIButton *returnBtn = [UIButton buttonWithType:UIButtonTypeCustom];
//设置title:返回
[returnBtn setTitle:@"返回" forState:UIControlStateNormal];
//正常下image
[returnBtn setImage:[UIImage imageNamed:@"black"] forState:UIControlStateNormal];
//高亮下image
[returnBtn setImage:[UIImage imageNamed:@"grat"] forState:UIControlStateHighlighted];
//正常下title颜色
[returnBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
//高亮下title颜色
[returnBtn setTitleColor:[UIColor lightGrayColor] forState:UIControlStateHighlighted];
//设置按钮位置大小,注意这里位置无效果
[returnBtn setFrame:CGRectMake(0, 0, 70, 20)];
//按钮内部对齐
[returnBtn setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];
//设置图片内部位置
[returnBtn setContentEdgeInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
//添加点击事件
[returnBtn addTarget:self action:@selector(returnBtnClick) forControlEvents:UIControlEventTouchUpInside];
//当视图推送时隐藏tabbar
viewController.hidesBottomBarWhenPushed = YES;
//自定义push视图的leftBarButtonItem
viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:returnBtn];
}
//子控制器通过这个方法推送视图
[super pushViewController:viewController animated:animated];
}

三.添加UIBarButtonItem的类扩展UIBarButtonItem＋NPBarbutton,创建UIbarbuttonItem类方法
1.UIbarbuttonItem类方法

/**
 *创建一个UIBarbuttonItem 类方法，这个方法是类方法创建一个按钮，传入的参数：image正常显示的图片，hightImage高亮情况下显示的图片，target用的对象，action点击的行为。
 */
+ (instancetype)itemWithImage:(NSString *)image hightImage:(NSString *)hightImage target:(id)target action:(SEL)action
{
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn setBackgroundImage:[UIImage imageNamed:image] forState:UIControlStateNormal];
    [btn setBackgroundImage:[UIImage imageNamed:hightImage] forState:UIControlStateNormal];
    //btnsize 是北京图片的大小
    CGSize btnsize = btn.currentBackgroundImage.size;
    //设置btn的frame
    [btn setFrame:CGRectMake(0, 0, btnsize.width, btnsize.height)];
    [btn addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
    return [[self alloc] initWithCustomView:btn];
}

四.继承UIViewController创建NPUIViewController基类，添加滑动返回

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    //代理置空，否则会闪退
    if ([self.navigationController       respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.delegate = nil;
    }
    
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    //开启iOS7的滑动返回效果
    if ([self.navigationController   respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        //只有在二级页面生效
        if ([self.navigationController.viewControllers count] == 2) {
            self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;
        }
    }
}

以上为基础框架主要实现，有很多不足之处，请大家多多指出！

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作者：大毛集团

本文Demo下载地址：https://github.com/nfl404/iOS_Obj_BaseFrameWork
Swift Demo下在抵制：https://github.com/nfl404/iOS_Swift_BaseFrameWork
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