Question

我有一个ViewController，名为＆＃34; TapRaceViewController＆＃34;它继承自父母，＃34; GameViewCController＆＃34;。但是，没有显示任何TapRaceViewControllers子视图 - 只显示来自GameController的视图。这是为什么？正在调用TapRacerViewController的viewDidLoad，因此我不明白为什么没有添加子视图。

//
//  TapRacerViewController.h
//  MiniGame
//
//  Created by Software Engineering on 11/16/14.
//
//

#import "GameViewController.h"

@interface TapRacerViewController : GameViewController

@end

TapRacerViewController.m

//
//  TapRacerViewController.m
//  MiniGame
//
//  Created by Software Engineering on 11/16/14.
//
//

#import "TapRacerViewController.h"

@interface TapRacerViewController ()

@end

@implementation TapRacerViewController
{
    //A single tap on the screen
    UITapGestureRecognizer* singleTap;

    //the player
    UILabel* player;

    //The view
    UIView* m_baseView;
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    //Create the base view
    m_baseView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
    [m_baseView setBackgroundColor:[UIColor blueColor]];
    [self.view addSubview:m_baseView];

    //Create the tap gesture
    singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap)];
    [m_baseView addGestureRecognizer:singleTap];

    //Create the player
    player = [[UILabel alloc] initWithFrame:CGRectMake(self.view.bounds.size.width - 50, self.view.bounds.size.height / 2, 50, 50)];
    [player setBackgroundColor:[UIColor blackColor]];
    [m_baseView addSubview:player];

}

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

//Handles a tap
- (void) handleSingleTap
{
    NSLog(@"Tap!");
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

GameViewController，

//
//  GameViewController.h
//  MiniGame
//
//  Created by Software Engineering on 11/16/14.
//
//

#import <UIKit/UIKit.h>

@interface GameViewController : UIViewController
//Base init
-(id) initWithDifficulty:(int)difficulty;

//On each tick
-(void) onTick;

@end

GameViewController.m

//
//  GameViewController.m
//  MiniGame
//
//  Created by Software Engineering on 11/16/14.
//
//

#import "GameViewController.h"

@interface GameViewController ()

@end

@implementation GameViewController
{
    //Timer
    NSTimer* m_timer;
    //Counter of the timer
    float m_timerCounter;
    //How long the minigame lasts
    float m_time;

    //Base view
    UIView* m_baseView;


    //How often a tick occurs
    float m_tick;
    //Text that tells the user what to do
    UILabel* m_instructionLabel;
}

//Base initialization
-(id) initWithDifficulty:(int)difficulty
{
    NSLog(@"Heyea");
    //Base initialization
    self = [super init];
    if(self)
    {
        if(difficulty == 1)
        {
            m_time = 5.0f;
        }
        else if(difficulty == 2)
        {
            m_time = 4.0f;
        }
        else
        {
            m_time = 3.0f;
        }

        //Set the timer counter to 0.0f;
        m_timerCounter = 0.0f;

        //Set the tick frequency to 0.001f;
        m_tick = 0.001f;

        //Set the base view
        m_baseView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
        [m_baseView setBackgroundColor:[UIColor whiteColor]];
        [self.view addSubview:m_baseView];


        //Set the default instruction text
        m_instructionLabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
        [m_instructionLabel setText:@"Instruction!"];
        [m_instructionLabel setFont:[UIFont fontWithName:@"Georgia-BoldItalic" size:15.0]];
        [m_instructionLabel setTextColor:[UIColor redColor]];
        [m_baseView addSubview:m_instructionLabel];
    }

    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

//When the view loads, start the countdown
-(void) viewDidAppear:(BOOL)animated
{
    //Start the timer
    m_timer = [NSTimer scheduledTimerWithTimeInterval:m_tick target:self selector:@selector(onTick) userInfo:nil repeats:YES];
}

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


//On every tick from m_timer
- (void)onTick
{
   // NSLog(@"Tick!");
   // NSLog(@"%.2f", m_timerCounter);

    //Incriment the alpha of the text
    if(m_instructionLabel.alpha > 0.7) {
        [m_instructionLabel setAlpha:m_instructionLabel.alpha - 0.001];
    }
    //Incriment the timer counter by a tick
    m_timerCounter += m_tick;
    //If the timer counter is more than the alloted time for the mini game, quit the mini game
    if(m_timerCounter > m_time)
    {
        //Stop the timer
        [m_timer invalidate];
        m_timer = nil;

        //Dismiss this view controller
        [[self presentingViewController] dismissViewControllerAnimated:NO completion:nil];
    }

}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

Answer 1

我还没有将视图添加到它的超级视图中我猜。

[self.view addSubview:m_baseView];

将此行写在viewDidLoad方法的末尾。

视图未在ViewController中显示

1 个答案: