我的代码如下：   UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

  button.frame = CGRectMake(0.0, 0.0, 25, 25);



  [[button layer] setCornerRadius:5.0f];

  [[button layer] setMasksToBounds:YES];

  [[button layer] setBackgroundColor:[[UIColor redColor] CGColor]];

  [button.titleLabel setFrame:CGRectMake(0,0, 25, 25)];



  [button setTitle:[NSString stringWithFormat:@"%@", [[topics objectAtIndex:indexPath.row] unread]] forState:UIControlStateNormal];
复制代码但是代码不能很好地运行，怎么回事呢？

我的代码如下：   UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

  button.frame = CGRectMake(0.0, 0.0, 25, 25);



  [[button layer] setCornerRadius:5.0f];

  [[button layer] setMasksToBounds:YES];

  [[button layer] setBackgroundColor:[[UIColor redColor] CGColor]];

  [button.titleLabel setFrame:CGRectMake(0,0, 25, 25)];



  [button setTitle:[NSString stringWithFormat:@"%@", [[topics objectAtIndex:indexPath.row] unread]] forState:UIControlStateNormal];
复制代码但是代码不能很好地运行，怎么回事呢？