怎樣一個視圖控制器移動到另一個視圖 - 控制iOS中加載進度

Question

嗨之後我在iOS的初學者在我的項目，我使用進度條

在這裏，我的主要要求我想以後加載進度條上5秒完成該進度條裝載我想搬到另一個視圖控制器爲了這個，我已經使用了一些代碼，但不工作，請幫助我

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    self.progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault]; 
    self.progressView.center = self.view.center; 
    [self.view addSubview:self.progressView]; 

    self.myTimer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(updateUI:) userInfo:nil repeats:YES]; 


} 

- (void)updateUI:(NSTimer *)timer 
{ 
self.progressView.progress += 0.5; 

    ContactVC*VC = [self.storyboard instantiateViewControllerWithIdentifier:@"ContactVC"]; 
    [self.navigationController pushViewController:VC animated:YES]; 

} 

Answer 1

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault]; 
    progressView.center = self.view.center; 
    [self.view addSubview:progressView]; 

    myTimer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(updateUI:) userInfo:nil repeats:YES]; 
} 

- (void)updateUI:(NSTimer *)timer 
{ 
    progressView.progress += 0.5/10; 

    if ((int)progressView.progress) { 

     [myTimer invalidate]; 

    Demoview*VC = [self.storyboard instantiateViewControllerWithIdentifier:@"Demoview"]; 
    [self.navigationController pushViewController:VC animated:YES]; 
    } 
} 

Answer 2

更新這個方法：

- (void)updateUI:(NSTimer *)timer 
{ 
    self.progressView.progress += 0.5/100;//because this limit is [0-1]. So, you have divide each progress unit by 100 in order to show percentage progress. 
    NSLog(@"%f",self.progressView.progress); 
    if ((int)self.progressView.progress) { 
     NSLog(@"Call View"); 
     [self.myTimer invalidate]; 
     self.myTimer = nil;//so that timer not fire again 
     ContactVC *VC = [self.storyboard instantiateViewControllerWithIdentifier:@"ContactVC"]; 
     [self.navigationController pushViewController:VC animated:YES]; 
} 
}