UITabBarController的创建与自定义TarBar---学习笔记三

代码如下：

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#import <UIKit/UIKit.h>   @interface BSJTabBarViewController : UITabBarController   @end #import "BSJTabBarViewController.h" #import "BSJTabBar.h" @interface BSJTabBarViewController ()     @end   @implementation BSJTabBarViewController   #pragma mark --- life cycle - (void)viewDidLoad {     [super viewDidLoad];     // Do any additional setup after loading the view. //    self.tabBarItem = [UITabBarItem application]     UITabBarItem *tabBarItem = [UITabBarItem  appearance];     //未选中的     NSMutableDictionary *norAttri = [NSMutableDictionary dictionary];     norAttri[NSFontAttributeName] = [UIFont systemFontOfSize:14];     norAttri[NSForegroundColorAttributeName] = [UIColor grayColor];     [tabBarItem setTitleTextAttributes:norAttri forState:UIControlStateNormal];     //选中的     NSMutableDictionary *selectAttri = [NSMutableDictionary dictionary];     selectAttri[NSForegroundColorAttributeName] = [UIColor darkGrayColor];     [tabBarItem setTitleTextAttributes:selectAttri forState:UIControlStateSelected];   //精华 [self setupChridViewController:[[UITableViewController alloc] init] title:NSLocalizedString(@"精华", nil) normalImage:@"tabBar_essence_icon" selectedImage:@"tabBar_essence_click_icon"]; [self setupChridViewController:[[UIViewController alloc] init] title:NSLocalizedString(@"关注", nil) normalImage:@"tabBar_friendTrends_icon" selectedImage:@"tabBar_friendTrends_click_icon"]; [self setupChridViewController:[[UITableViewController alloc] init] title:NSLocalizedString(@"新帖", nil) normalImage:@"tabBar_new_icon" selectedImage:@"tabBar_new_click_icon"]; [self setupChridViewController:[[UITableViewController alloc] init] title:NSLocalizedString(@"我", nil) normalImage:@"tabBar_me_icon" selectedImage:@"tabBar_me_click_icon"];  // 通过KVC，可以改变属性为readOnly,改变它的Key，也就是通过它的value找到它的key [self setValue:[[BSJTabBar alloc] init] forKey:@"tabBar"];  }   - (void)setupChridViewController:(UIViewController *)vc title:(NSString *)title normalImage:(NSString *)normalImage selectedImage:(NSString *)selectedImage{ vc.title = title; if (normalImage.length && selectedImage.length ) { vc.tabBarItem.image = [UIImage imageNamed:normalImage]; vc.tabBarItem.selectedImage = [UIImage imageNamed:selectedImage]; } [self addChildViewController:vc]; }   //tabBar    #import <UIKit/UIKit.h>  @interface BSJTabBar : UITabBar  @end   #import "BSJTabBar.h"   @interface BSJTabBar() @property (nonatomic, weak)UIButton *publicButton;   @end @implementation BSJTabBar  - (void)layoutSubviews{ [super layoutSubviews];   // BSJLogFunc CGFloat buttonW = self.frame.size.width/5;  CGFloat buttonH = self.frame.size.height;  CGFloat buttonY = 0; CGFloat i = 0;  for (UIView *subView in self.subviews)  { BSJLog(@"%@",NSStringFromClass(subView.class));  // if (![subView.class isSubclassOfClass:[NSClassFromString(@"UITabBarButton") class]]) continue;   if (![@"UITabBarButton" isEqualToString:NSStringFromClass(subView.class)]) continue; CGFloat buttonX = i*buttonW; if (i >= 2) { buttonX += buttonW; } subView.frame = CGRectMake(buttonX, buttonY, buttonW, buttonH); i++; } //        [ self.publicButton setFrame:CGRectMake(0, 0, self.frame.size.width/5, self.frame.size.height)]; // self.publicButton.center = CGPointMake(self.center.x, self.center.y); }  #pragma mark --- response methods  - (void)buttonClick:(UIButton *)sender{ }   #pragma mark --- setters and getters - (UIButton *)publicButton{  if (!_publicButton) { UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; [button setImage:[UIImage imageNamed:@"tabBar_publish_icon"] forState:UIControlStateNormal]; [button setImage:[UIImage imageNamed:@"tabBar_publish_click_icon"] forState:UIControlStateHighlighted];  [button addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];  [self addSubview:button]; _publicButton = button; } return _publicButton; }  @end