Question

所以我试图制作4个按钮，每个按钮占据屏幕的1/4。但是，当我创建如下所示的按钮时，它们都处于相同的位置。我不确定这是怎么可能的，因为我已经在各个不同的地方设定了它们。有人可以解释为什么会发生这种情况并提供解决方案吗？

编辑：我删除了自动布局，但没有解决问题

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.sequence = [[NSMutableArray alloc] init];
    float sizeWidth = [self view].bounds.size.width/2;
    float sizeHeight = [self view].bounds.size.height/2;
    CGPoint origin = [self view].bounds.origin;
    // Configure button sizes
    CGRect topLeft = CGRectMake(origin.x/2, origin.y/2, sizeWidth, sizeHeight);
    _zeroButton.frame = topLeft;
    CGRect topRight = CGRectMake(origin.x * 3/2, origin.y/2, sizeWidth, sizeHeight);
    _oneButton.frame = topRight;
    CGRect bottomLeft = CGRectMake(origin.x/2, origin.y * 3/2, sizeWidth, sizeHeight);
    _twoButton.frame = bottomLeft;
    CGRect bottomRight = CGRectMake(origin.x * 3/2, origin.y * 3/2, sizeWidth, sizeHeight);
    _threeButton.frame = bottomRight;

}

Answer 1

你所有的矩形都在原点0,0，因为你正在使用（仅）乘法和除法运算...... 你应该看看CGRectOffset（）.. 例如

CGRect rct = self.view.bounds;
rct.size.width /= 2.0;
rct.size.height /= 2.0;

UIButton *button1 = [[UIButton alloc]initWithFrame:rct]; //top left
  //  add target, addToView etc..

UIButton *button2 = [[UIButton alloc]initWithFrame: CGRectOffset(rct, rct.size.width, 0.0) ];
  // etc..

UIButton *button3 = [[UIButton alloc]initWithFrame: CGRectOffset(rct, 0.0, rct.size.height) ];
  //etc
UIButton *button4 = [[UIButton alloc]initWithFrame: CGRectOffset(rct, rct.size.width, rct.size.height) ];
 //etc

实现相对大小的按钮

1 个答案: