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iOS之單獨(dú)使用UISearchBar創(chuàng)建搜索框的示例

 更新時(shí)間：2017年10月31日 11:20:43   作者：張大普奔  
本篇文章主要介紹了iOS之單獨(dú)使用UISearchBar創(chuàng)建搜索框的示例，小編覺得挺不錯(cuò)的，現(xiàn)在分享給大家，也給大家做個(gè)參考。一起跟隨小編過來看看吧

這里實(shí)現(xiàn)的是進(jìn)入頁面后直接在導(dǎo)航欄上顯示搜索框（包含右側(cè)取消按鈕），并彈出鍵盤且搜索框?yàn)橹苯涌奢斎霠顟B(tài)（第一響應(yīng)者），點(diǎn)擊右側(cè)取消按鈕后收起鍵盤并返回上一頁。

搜索頁面

1.實(shí)現(xiàn)代理UISearchBarDelegate

@interface SearchViewController ()<UISearchBarDelegate>

2.創(chuàng)建一個(gè)UISearchBar為屬性

@property (nonatomic, strong) UISearchBar *searchBar;

3.進(jìn)入頁面后彈起鍵盤和離開頁面前收起鍵盤

- (void)viewDidAppear:(BOOL)animated
{
  [super viewDidAppear:animated];
  if (!_searchBar.isFirstResponder) {
    [self.searchBar becomeFirstResponder];
  }
}
- (void)viewWillDisappear:(BOOL)animated
{
  [super viewWillDisappear:animated];
  [self.searchBar resignFirstResponder];
}

4.具體實(shí)現(xiàn)

- (void)setBarButtonItem
{
  //隱藏導(dǎo)航欄上的返回按鈕
  [self.navigationItem setHidesBackButton:YES];
  //用來放searchBar的View
  UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(5, 7, self.view.frame.size.width, 30)];
  //創(chuàng)建searchBar
  UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth(titleView.frame) - 15, 30)];
  //默認(rèn)提示文字
  searchBar.placeholder = @"搜索內(nèi)容";
  //背景圖片
  searchBar.backgroundImage = [UIImage imageNamed:@"clearImage"];
  //代理
  searchBar.delegate = self;
  //顯示右側(cè)取消按鈕
  searchBar.showsCancelButton = YES;
  //光標(biāo)顏色
  searchBar.tintColor = UIColorFromRGB(0x595959);
  //拿到searchBar的輸入框
  UITextField *searchTextField = [searchBar valueForKey:@"_searchField"];
  //字體大小
  searchTextField.font = [UIFont systemFontOfSize:15];
  //輸入框背景顏色
  searchTextField.backgroundColor = [UIColor colorWithRed:234/255.0 green:235/255.0 blue:237/255.0 alpha:1];
  //拿到取消按鈕
  UIButton *cancleBtn = [searchBar valueForKey:@"cancelButton"];
  //設(shè)置按鈕上的文字
  [cancleBtn setTitle:@"取消" forState:UIControlStateNormal];
  //設(shè)置按鈕上文字的顏色
  [cancleBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
  [titleView addSubview:searchBar];
  self.searchBar = searchBar;
  self.navigationItem.titleView = titleView;
}

5.實(shí)現(xiàn)代理方法

#pragma mark - UISearchBarDelegate
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar{
  return YES;
}

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
  searchBar.showsCancelButton = YES;
}

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
  NSLog(@"SearchButton");
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
  [self.searchBar resignFirstResponder];
  [self.navigationController popViewControllerAnimated:YES];
}

- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar
{
  searchBar.showsCancelButton = YES;
}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
  NSString *inputStr = searchText;
  [self.results removeAllObjects];
  for (ElderModel *model in self.dataArray) {
    if ([model.name.lowercaseString rangeOfString:inputStr.lowercaseString].location != NSNotFound) {
      [self.results addObject:model];
    }
  }
  [self.tableView reloadData];
}

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