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在我的uiviewcontroller的子類中，實現代理方法UITabBarControllerDelegate。我的初始化方法如下：Tabbar無法顯示圖像
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *viewControllersArray = [[NSMutableArray alloc]init];
[viewControllersArray addObject:Originalviewcontroller];
[viewControllersArray addObject:differentviewcontroller];
[viewControllersArray addObject:tradeviewcontroller];
UITabBarController *uitabbarcontroller = [[UITabBarController alloc]init];
uitabbarcontroller.delegate = self;
uitabbarcontroller.viewControllers = viewControllersArray;
[_shanghaitradeviewcontroller.tabBarItem initWithTitle:@"" image:[UIImage imageNamed:@"OriginalMarket.png"] tag:1];
[_shanghaidifferentviewcontroller.tabBarItem initWithTitle:@"" image:[UIImage imageNamed:@"DifferentMarket.png"] tag:2];
[_shanghaitradeviewcontroller.tabBarItem initWithTitle:@"" image:[UIImage imageNamed:@"Trade.png"] tag:3];
[self.view addSubview:uitabbarcontroller.view];
}
一切似乎都正常，但第一個圖像無法顯示，爲什麼？
UPDATE：
很抱歉，我找到了答案，因爲我犯了一個錯誤：
[_shanghaitradeviewcontroller.tabBarItem initWithTitle:@"" image:[UIImage imageNamed:@"OriginalMarket.png"] tag:1];
而且應該是：
_shanghaiOriginalviewcontroller = [[ShanghaiOriginalMarketViewController alloc]initWithNibName:@"ShanghaiOriginalMarketViewController" bundle:nil];