关于UISearchBar

关于UISearchBar的一些问题。

1：修改UISearchBar的背景颜色

UISearchBar是由两个subView组成的，一个是UISearchBarBackGround,另一个是UITextField. 要IB中没有直接操作背景的属性。方法是直接将 UISearchBarBackGround移去   

seachBar=[[UISearchBar alloc] init];

seachBar.backgroundColor=[UIColor clearColor];

for (UIView *subview in seachBar.subviews) 

{  

　　if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")])

       {  

　　　　　　[subview removeFromSuperview];  

　　　　　　break;

　　　　} 

}

  

第二种解决的方法：

[[searchbar.subviews objectAtIndex:0]removeFromSuperview];

2：

UISearchBar* m_searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 44, 320, 41)]; m_searchBar.delegate = self; m_searchBar.barStyle = UIBarStyleBlackTranslucent; m_searchBar.autocorrectionType = UITextAutocorrectionTypeNo; m_searchBar.autocapitalizationType = UITextAutocapitalizationTypeNone; m_searchBar.placeholder = _(@"Search"); m_searchBar.keyboardType =  UIKeyboardTypeDefault; //为UISearchBar添加背景图片 UIView *segment = [m_searchBar.subviews objectAtIndex:0]; UIImageView *bgImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Images/search_bar_bg.png"]]; [segment addSubview: bgImage]; //<---背景图片 [self.view addSubview:m_searchBar]; [m_searchBar release]; 3：取消UISearchBar调用的键盘  [searchBar resignFirstResponder]; 添加UISearchBar的两种方法： 代码 UISearchBar  * mySearchBar  =  [[UISearchBar alloc] initWithFrame:CGRectMake( 0.0 ,  0.0 , self.view.bounds.size.width,  45 )];          mySearchBar. delegate   =  self;          mySearchBar.showsCancelButton  =  NO;          mySearchBar.barStyle = UIBarStyleDefault;          mySearchBar.placeholder = @" Enter Name or Categary " ;          mySearchBar.keyboardType = UIKeyboardTypeNamePhonePad;          [self.view addSubview:mySearchBar];          [mySearchBar release]; 在 tableview上添加： 代码 // add Table         UITableView  * myBeaconsTableView  =  [[UITableView alloc]                                             initWithFrame:CGRectMake( 0 ,  0 , self.view.bounds.size.width, self.view.bounds.size.height - 40 )                                             style:UITableViewStylePlain];                  myBeaconsTableView.backgroundColor  =  [UIColor whiteColor];         myBeaconsTableView. delegate = self;         myBeaconsTableView.dataSource = self;         [myBeaconsTableView setRowHeight: 40 ];                   //  Add searchbar          searchBar  =  [[UISearchBar alloc] initWithFrame:CGRectMake( 0.0 ,  0.0 , self.view.bounds.size.width,  40 )];         searchBar.placeholder = @" Enter Name " ;         searchBar. delegate   =  self;         myBeaconsTableView.tableHeaderView  =  searchBar;         searchBar.autocorrectionType  =  UITextAutocorrectionTypeNo;         searchBar.autocapitalizationType  =  UITextAutocapitalizationTypeNone;         [searchBar release];                  [self.view addSubview:myBeaconsTableView];         [myBeaconsTableView release];