Question

我是一个试图学习iOS开发的python / java程序员。我在开源游戏中工作（出于学习目的 - 代码可以在这里找到：https://github.com/nathanborror/FlapFlap）。我尝试以编程方式在重启页面上添加一个按钮，如果用户输了游戏，用户就会登陆该按钮。这是我的代码，它不会给我任何错误，但按钮只是没有出现。请注意，我已经注释了开源中提供的代码。

#import "NewGameScene.h"
#import "GameScene.h"

@implementation NewGameScene {
  SKSpriteNode *_button;
    UIButton *myButton;
}

- (id)initWithSize:(CGSize)size
{
  if (self = [super initWithSize:size]) {
    [self setBackgroundColor:[SKColor colorWithRed:.61 green:.74 blue:.86 alpha:1]];


      myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
      [myButton addTarget:self action:@selector(myMethod) forControlEvents:UIControlEventTouchDown];
      [myButton setTitle:@"Start!" forState:UIControlStateNormal];
      myButton.frame = CGRectMake(128, 32, self.size.width/2, self.size.height/10);
      [self.view addSubview:myButton];

      /*
    _button = [SKSpriteNode spriteNodeWithColor:[SKColor colorWithWhite:1 alpha:1] size:CGSizeMake(128, 32)];
    [_button setPosition:CGPointMake(self.size.width/2, self.size.height/10)];
    [self addChild:_button];
       */
  }
  return self;
}

-(void) myMethod{
    SKTransition *transition = [SKTransition doorsCloseHorizontalWithDuration:.4];
    GameScene *game = [[GameScene alloc] initWithSize:self.size];
    [self.scene.view presentScene:game transition:transition];
}

/*
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
  SKTransition *transition = [SKTransition doorsCloseHorizontalWithDuration:.4];
  GameScene *game = [[GameScene alloc] initWithSize:self.size];
  [self.scene.view presentScene:game transition:transition];
}
 */

@end

Answer 1

试试这个......

myButton = [UIButton alloc]initWithFrame:CGRectMake(128, 32, 100, 100);
      [myButton addTarget:self action:@selector(myMethod) forControlEvents:UIControlEventTouchDown];
      [myButton setTitle:@"Start!" forState:UIControlStateNormal];
      [self.view addSubview:myButton];

查看它是否出现在您的视图中。

UIButton没有出现

1 个答案: