1.遵守代理

• (UISearchBar *)searchBar
  {
  if (_searchBar == nil) {
  _searchBar = [[UISearchBar alloc]init];
  [_searchBar setBackgroundImage:[UIImage imageWithColor:[UIColor colorWithHex:0xeaeaea]]];//背景图片
  [_searchBar sizeToFit];
  [_searchBar changeLeftPlaceholder:@"女装"];
  [_searchBar setDelegate:self];
  [_searchBar setKeyboardType:UIKeyboardTypeDefault];
  [_searchBar setTranslucent:YES];//设置是否透明
  [_searchBar setSearchBarStyle:UISearchBarStyleProminent];
  [_searchBar setShowsCancelButton:NO];
  _searchBar.tintColor = [UIColor orangeColor];
  UITextField *txfSearchField = [_searchBar valueForKey:@"_searchField"];
  if (txfSearchField) {
  UIImageView *searchImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 15, 15)];
  searchImageView.image = [UIImage imageNamed:@"icon_search"];
  txfSearchField.backgroundColor=[UIColor colorWithHex:0xeaeaea];
  searchImageView.contentMode = UIViewContentModeCenter;
  txfSearchField.leftView = searchImageView;
  txfSearchField.leftViewMode = UITextFieldViewModeAlways;
  }
  }
  [self addSubview:_searchBar];
  [_searchBar mas_makeConstraints:^(MASConstraintMaker *make) {
  make.top.equalTo(@7);
  make.left.equalTo(@2);
  make.height.equalTo(@30);
  make.right.equalTo(@-2);
  }];
  return _searchBar;
  }
  3.设置搜索框取消按钮

• (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
  {
  searchBar.showsCancelButton = YES; //显示“取消”按钮
  for(id cc in [searchBar subviews])
  {
  for (UIView *view in [cc subviews]) {
  if ([NSStringFromClass(view.class)isEqualToString:@"UINavigationButton"])
  {
  UIButton *btn = (UIButton *)view;
  [btn setTitle:@"取消" forState:UIControlStateNormal];
  }
  }
  }
  }
  4.搜索框响应键盘 return事件代理方法

• (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
  NSLog(@"确定事件");
  if (searchBar.text.length) {
  NSLog(@"弹出搜索试图");
  [self finder:searchBar.text];
  }else{
  [self.dateSource removeAllObjects];
  [self updateTabelFrame];
  [self.firendtableview reloadData];
  }
  }
  5.搜索框监听输入内容变化

• (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
  NSLog(@"确定事件");
  if (searchBar.text.length) {
  NSLog(@"弹出搜索试图");
  [self finder:searchBar.text];
  }else{
  [self.dateSource removeAllObjects];
  [self updateTabelFrame];
  [self.firendtableview reloadData];
  }
  }