学了两天IOS趁着还没忘光，巩固一下所学知识想做点东西，由于自己的设计能力有限，所以就山寨一下吧，说到山寨怎么能忘了腾讯呢，今天发现QQ音乐的设计风格是扁平化的，小清新风格，所以就山寨一下它吧。。

由于本屌没有iphone手机只能用Ipad运行iphone应用看看QQ音乐的效果，我的ipad是ios7的不知道QQ音乐是不是在IOS6上也是这种风格（想来肯定是的，腾讯的设计能力还是挺厉害的，山寨也是需要实力的不是）。

下面来真格的。。。。

首先是层次，据我观察是一个UITabBarController下面包含四个UINavigationController，每个UINavigationController下面包含UITableViewController（我也不知道对不对，反正我就这么做了）

接下来我们建立一个空的PRoject新建一个类继承自UITabBarController，这里我就叫RootViewController，然后再Window的代理类中将window的根控制器设置为我们新建的rootViewController，

 1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 2 {
 3     self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
 4     // Override point for customization after application launch.
 5     self.window.backgroundColor = [UIColor whiteColor];
 6     
 7     RootViewController *rootViewController = [[RootViewController alloc] init];
 8     [self.window setRootViewController:rootViewController]; //设置跟控制器为我们新建的RootViewController,其实就是设置为UITabBarController
 9     
10     [self.window makeKeyAndVisible];
11     return YES;
12 }

然后就是在UITabBarController中设置四个UINavigationController主要实现代码如下

 1     //设置UItabBar的高度为50
 2     self.tabBar.frame = CGRectMake(0, CGRectGetHeight([[UIScreen mainScreen] bounds]) - 50, CGRectGetWidth([[UIScreen mainScreen] bounds]), 50);
 3     
 4     
 5     if (IOS_7) {
 6         [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: [UIColor whiteColor], UITextAttributeTextColor, [UIFont fontWithName:@"Arial" size:0.0], UITextAttributeFont,nil] forState:UIControlStateHighlighted]; //设置UITabBarItem高亮时title的颜色为白色
 7     }
 8     else{
 9         [[UITabBar appearance] setBackgroundImage:[UIImage imageWithColor:[UIColor whiteColor] size:CGSizeMake(1, 50)]]; //使用纯色图片填充IOS默认的UITabBar
10         [[UITabBar appearance] setSelectionIndicatorImage:[UIImage new]];//去掉IOS6选中时的高光效果
11         //设置IOS6的UINagitationBar的颜色为白色
12         [[UINavigationBar appearance] setBackgroundImage:[UIImage imageWithColor:[UIColor whiteColor] size:CGSizeMake(1, 44)] forBarMetrics:UIBarMetricsDefault];
13     }
14     
15     //Universal
16     //设置IOS6和IOS7的UINavigationBar上的字体统一为黑色
17     [[UINavigationBar appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: [UIColor blackColor], UITextAttributeTextColor, [UIFont fontWithName:@"Arial" size:20 ], UITextAttributeFont, [UIFont boldSystemFontOfSize:20], NSFontAttributeName, [NSValue valueWithUIOffset:UIOffsetZero], UITextAttributeTextShadowOffset, nil]];
18     
19     
20     //我的音乐
21     MyMusicViewController *myMusicView = [[MyMusicViewController alloc] init];
22     UINavigationController *myMusicNavigation = [[UINavigationController alloc] initWithRootViewController:myMusicView];
23     myMusicNavigation.tabBarItem = [UITabBarItem initCustomWithImage:@"mymusic" withSelectedImage:@"mymusicSelected" withTitle:@"我的音乐"];
24     
25     //音乐馆
26     MusicHallViewController *musicHallView = [[MusicHallViewController alloc] init];
27     UINavigationController *musicHallNavigation = [[UINavigationController alloc] initWithRootViewController:musicHallView];
28     musicHallNavigation.tabBarItem = [UITabBarItem initCustomWithImage:@"musicHall" withSelectedImage:@"musicHallSelected" withTitle:@"音乐馆"];
29     
30     //发现
31     FinderViewController *finderView = [[FinderViewController alloc] init];
32     UINavigationController *finderNavigation = [[UINavigationController alloc] initWithRootViewController:finderView];
33     finderNavigation.tabBarItem = [UITabBarItem initCustomWithImage:@"finder" withSelectedImage:@"finderSelected" withTitle:@"发现"];
34     
35     //更多
36     MoreViewController *moreView = [[MoreViewController alloc] init];
37     UINavigationController * moreNavigation = [[UINavigationController alloc] initWithRootViewController:moreView];
38     moreNavigation.tabBarItem = [UITabBarItem initCustomWithImage:@"more" withSelectedImage:@"moreSelected" withTitle:@"更多"];
39     
40     
41     NSArray *viewControllers = [NSArray arrayWithObjects:myMusicNavigation, musicHallNavigation, finderNavigation, moreNavigation, nil];
42     [self setViewControllers:viewControllers];

代码中的IOS_7是一个宏定义

1 #define IOS_7 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)

 创建UITabBarItem的方法我写在了一个Category中定义了一个类方法

 1 + (UITabBarItem *) initCustomWithImage:(NSString *)image withSelectedImage:(NSString *)selectedImage withTitle:(NSString *)title
 2 {
 3     UIEdgeInsets insets = UIEdgeInsetsMake(6, 0, -6, 0); //UITabBarItem的偏移量 上左下右
 4     UIImage *myImage = [UIImage imageNamed:image];
 5     UIImage *myImageSelected = [UIImage imageNamed:selectedImage];
 6     UITabBarItem *myTabBarItem = [[UITabBarItem alloc] init];
 7     myTabBarItem.imageInsets = insets;
 8     myTabBarItem.title = title;
 9     if (IOS_7) {
10         myTabBarItem.image = [myImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
11         myTabBarItem.selectedImage = [myImageSelected imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
12     }
13     else
14     {
15         [myTabBarItem setFinishedSelectedImage:myImageSelected withFinishedUnselectedImage:myImage];
16     }
17     return myTabBarItem;
18 }

 为了在IOS6和IOS7中都是用同样的扁平化风格，需要对IOS6作特别的设置，需要将UINavigationBar和UIBabBar的背景用纯色图片填充，title的字体样式也要设置为统一风格，具体的一下做法可以参考如下博客

http://esoftmobile.com/2014/01/14/build-ios6-ios7-apps/

由于初学 水平有限 刚开了个头 写了个初步布局 先到这里 还有一些问题没有解决 来张图片

虽然IOS6和IOS7是初步统一了样式，但是官方的我的音乐是在左边的，不知道怎么弄过去了。。。，请高人赐教。。。