UISearchBar相关

前段时间做了一个UISearchBar相关的需求，今天也总结以下。

1、UISearchBar自定义背景、取消按钮中文设置

UISearchBar *seachBar=[[UISearchBar alloc] init];

//修改搜索框背景
seachBar.backgroundColor=[UIColor clearColor];

//去掉搜索框背景
[[searchbar.subviews objectAtIndex:0]removeFromSuperview];

for (UIView *subview in seachBar.subviews)
{
if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")])
{
[subview removeFromSuperview];
break;
}
}

//自定义背景
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"40-di.png"]];
[searchBar insertSubview:imageView atIndex:1];

//输入搜索文字时隐藏搜索按钮，清空时显示
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {
searchBar.showsScopeBar = YES;
[searchBar sizeToFit];
[searchBar setShowsCancelButton:YES animated:YES];
return YES;
}

- (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar {
searchBar.showsScopeBar = NO;
[searchBar sizeToFit];
[searchBar setShowsCancelButton:NO animated:YES];
return YES;
}

//修改UISearchBar取消按钮中文字体
    for (id aa in [searchBar subviews]) {
        if ([aa isKindOfClass:[UIButton class]]) {
            UIButton *btn = (UIButton *)aa;
            [btn setTitle:@"取消" forState:UIControlStateNormal];
        }
    }

2、UISearchBar 的delegate方法

#pragma mark 搜索控件
//键盘搜索按钮被点击时触发
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
    UIStoryboard *mainStory = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    FirstViewController *fVC = [mainStory instantiateViewControllerWithIdentifier:@"goFirstView"];
    fVC.showStr = self.searchBar.text;
    [self presentModalViewController:fVC animated:YES];
}

//搜索框输入内容改变时触发
- (void) searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{

}

//焦点进入搜索框时触发
- (void) searchBarTextDidBeginEditing:(UISearchBar *)searchBar{
    self.soundBtn.hidden = YES;
    [self searchBar:searchBar activate:YES];

}

//取消搜索按钮点击时触发
- (void) searchBarCancelButtonClicked:(UISearchBar *)searchBar {
    self.searchBar.text = @"";
    self.soundBtn.hidden = NO;
    [self searchBar:searchBar activate:NO];
}

- (void)searchBar:(UISearchBar *)searchBar activate:(BOOL) active{
    if (!active) {
        [self.searchBar resignFirstResponder];
    }

    [self.searchBar setShowsCancelButton:active animated:YES];
    //修改UISearchBar取消按钮字体
    for (id aa in [searchBar subviews]) {
        if ([aa isKindOfClass:[UIButton class]]) {
            UIButton *btn = (UIButton *)aa;
            [btn setTitle:@"取消" forState:UIControlStateNormal];
        }
    }
}