如何将viewcontroller的背景颜色从灰色更改为设置的颜色？

Question

我试图改变viewcontroller的颜色。

有人让我知道如下。

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    self.view.backgroundColor = [UIColor groupTableViewBackgroundColor]; 

} 

这里是AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; 
    // Override point for customization after application launch. 
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) { 
     self.viewController = [[[ViewController alloc] init] autorelease]; 
    } else { 
     self.viewController = [[[ViewController alloc] init] autorelease]; 
    } 
    self.window.rootViewController = self.viewController; 
    [self.window makeKeyAndVisible]; 
    return YES; 
} 

这是ViewController.m

#import "ViewController.h" 
@interface ViewController() 

@end 

@implementation ViewController 
- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 

    self.view.backgroundColor = [UIColor groupTableViewBackgroundColor]; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

@end 

但是，结果是视图 - 控制是黑屏。

如何更改为设置backgroundcolor？

Answer 1

尝试这种

self.view.backgroundColor = [的UIColor clearColor];