模仿qq好友界面的时候，关于分组的section的按钮从巨左变成了居中。如何维持位置不变恩？

Question

• (instancetype)initWithReuseIdentifier:(NSString *)reuseIdentifier{
  if (self = [super initWithReuseIdentifier:reuseIdentifier]) {

  UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
  btn.frame = self.bounds;

  // [btn setBackgroundColor:[UIColor blackColor]];

  [btn setImage:[UIImage imageNamed:@"buddy_header_arrow"] forState:UIControlStateNormal];
  [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
  btn.imageView.contentMode = UIViewContentModeCenter;
  btn.imageView.clipsToBounds = YES;
  //设置按钮的巨左显示
  btn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
  //设置按钮的内边距
  btn.contentEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
  //设置按钮label 的内边距
  btn.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
  [btn addTarget:self action:@selector(nameBtnClick:) forControlEvents:UIControlEventTouchUpInside];
  [self addSubview:btn];
  self.nameBtn = btn;
  UILabel *label = [[UILabel alloc]init];
  label.frame = CGRectMake(320, 0, 150, 44);

  // label.backgroundColor = [UIColor redColor];

  label.textAlignment = UIControlContentHorizontalAlignmentRight;
  [self addSubview:label];
  self.textLbl = label;

  }
  return self;
  }