关于viewDidLoad里调用presentModalViewController的问题

来源：互联网发布：大数据挖掘培训可靠不编辑：程序博客网时间：2024/05/01 00:14

原贴地址：http://www.cocoachina.com/bbs/read.php?tid=97273

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- (void)viewDidLoad 里调用presentModalViewController无效果，

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions里调用presentModalViewController就有效果

加个button，在button点击事件里调用presentModalViewController也没有问题

表示非常迷惑，为什么- (void)viewDidLoad 里调用presentModalViewController就没有效果呢。
明眼的大神帮忙解释下吧- -
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在(void)viewDidAppear:(BOOL)animated里面调用吧

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最后分享一个利用presentModalViewController方法制作的启动动画吧，大神见笑了

    - (void)viewDidAppear:(BOOL)animated{        [loginViewController presentModalViewController:welcomeViewController animated:NO];        [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(dismissModalView) userInfo:nil repeats:NO];    }    - (void)viewDidLoad {        [super viewDidLoad];        loginViewController = [[UIViewController alloc] init];        loginViewController.view.frame = [[UIScreen mainScreen] bounds];        loginViewController.view.backgroundColor = [UIColor redColor];        [self.view addSubview:loginViewController.view];               welcomeViewController = [[UIViewController alloc] init];        welcomeViewController.view.frame = [[UIScreen mainScreen] bounds];        UIImageView *welcomeImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default.png"]];        welcomeImageView.frame = CGRectMake(0, 0, 320, 460);        [welcomeViewController.view addSubview:welcomeImageView];    }    - (void)dismissModalView{        welcomeViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;        [welcomeViewController dismissModalViewControllerAnimated:YES];    }

资源地址：http://download.csdn.net/detail/liyan5953wow/4162557