在iPhone应用程序开发中自定义搜索栏

Question

在我的应用程序中,我必须在tableview的头部添加一个搜索栏.我能够添加搜索栏但问题是没有添加ios的默认搜索栏我可以添加自定义搜索栏吗？我正在给出一张图片,看看会有哪些类型的搜索栏...

Answer 1

你可以子类化UISearchBar并重写layoutSubviews方法:

- (void)layoutSubviews {
   UITextField *searchField;
   NSUInteger numViews = [self.subviews count];
   for(int i = 0; i < numViews; i++) {
      if([[self.subviews objectAtIndex:i] isKindOfClass:[UITextField class]]) { //conform?
        searchField = [self.subviews objectAtIndex:i];
      }
   }
   if(!(searchField == nil)) {
       searchField.textColor = [UIColor whiteColor];
       [searchField setBackground: [UIImage imageNamed:@"yourImage.png"] ];
       [searchField setBorderStyle:UITextBorderStyleNone];
   }

   [super layoutSubviews];
}

你也可以:

//to clear searchbar backgraound
- (void) clearSearchBarBg
{
    for (UIView *subview in theSearchBar.subviews) 
    {
        if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) 
        {
            [subview removeFromSuperview];
            break;
        }
    }
}

//display showSearchButtonInitially in a keyboard 
- (void)showSearchButtonInitially
{
    UIView * subview;
    NSArray * subviews = [theSearchBar subviews];

    for(subview in subviews)
    {
        if( [subview isKindOfClass:[UITextField class]] )
        {
            NSLog(@"setEnablesReturnKeyAutomatically");
            [((UITextField*)subview) setEnablesReturnKeyAutomatically:NO];
            ((UITextField*)subview).delegate=self;
            [((UITextField*)subview) setEnabled:TRUE];
            ((UITextField*)subview).borderStyle = UITextBorderStyleNone;
            break;
        }
    }
}