我已经上网了大约一个小时，现在试图找到不同的方法来设置我的标签栏上的自定义图像。我正在使用调整大小的课程。如果有人熟悉它，那就是UIImage+ProportionalFill。我对Objective-C有点新，我对使用AppDelegate.h知之甚少。这是我的代码。我可以随意扯掉一个新的因为我确定它可能会成为一个新手的错误。
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions
{
// [UIApplication sharedApplication].idleTimerDisabled = YES;
[application setStatusBarStyle:UIStatusBarStyleBlackOpaque];
[[UITabBar appearance] setBackgroundColor:[UIColor colorWithRed:0/255.0 green:255/255.0 blue:255/255.0 alpha:1.0]];
UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;
UITabBar *tabBar = tabBarController.tabBar;
UITabBarItem *tabBarItem1 = [tabBar.items objectAtIndex:0];
UITabBarItem *tabBarItem2 = [tabBar.items objectAtIndex:1];
UITabBarItem *tabBarItem3 = [tabBar.items objectAtIndex:2];
UITabBarItem *tabBarItem4 = [tabBar.items objectAtIndex:3];
UITabBarItem *tabBarItem5 = [tabBar.items objectAtIndex:4];
UIImage *oldProfile= [UIImage imageNamed:@"profile.png"];
UIImage *oldFeed = [UIImage imageNamed:@"feed.png"];
UIImage *oldSearch = [UIImage imageNamed:@"search.png"];
UIImage *oldNotifications = [UIImage imageNamed:@"notification.png"];
UIImage *oldMap = [UIImage imageNamed:@"compass.png"];
UIImage *newProfile;
UIImage *newFeed;
UIImage *newSearch;
UIImage *newNotifications;
UIImage *newMap;
CGSize newSize = CGSizeMake(30, 30);
newProfile = [oldProfile imageScaledToFitSize:newSize];
newFeed = [oldFeed imageScaledToFitSize:newSize];
newSearch = [oldSearch imageScaledToFitSize:newSize];
newNotifications = [oldNotifications imageScaledToFitSize:newSize];
newMap = [oldMap imageScaledToFitSize:newSize];
[tabBarItem1 setFinishedSelectedImage:newFeed withFinishedUnselectedImage:newFeed];
[tabBarItem2 setFinishedSelectedImage:newMap withFinishedUnselectedImage:newMap];
[tabBarItem3 setFinishedSelectedImage:newSearch withFinishedUnselectedImage:newSearch];
[tabBarItem4 setFinishedSelectedImage:newNotifications withFinishedUnselectedImage:newNotifications];
[tabBarItem5 setFinishedSelectedImage:newProfile withFinishedUnselectedImage:newProfile];
// Override point for customization after application launch.
UIApplication* app = [UIApplication sharedApplication];
app.networkActivityIndicatorVisible = YES;
return YES;
}
编辑我收到的错误是：
-[UINavigationController tabBar]: unrecognized selector sent to instance
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '- [UINavigationController tabBar]: unrecognized selector sent to instance
`
答案 0 :(得分：1)