UISearchBar基本用法及searchBar常用代理方法

1.初始化



UISearchBar *searchBar = [[UISearchBaralloc]initWithFrame:CGRectMake(0,0, 320,40)];

searchBar.placeholder =@"搜索";
//和textfield一样有placeholder属性

searchBar.delegate =self;

[self.viewaddSubview:searchBar];

//由于个人需求 需要使用圆角的搜索框所以顺便对searchBar进行了一次遍历取出textfiled（ps：如果想修改searchBar背景 可以用imgaeView去接收view）

for (UIView *viewin searchBar.subviews) {

if ([view isKindOfClass:NSClassFromString(@"UIView")] && view.subviews.count > 0)
{

_textfield = [view.subviewsobjectAtIndex:1];

_textfield.layer.cornerRadius =14;

_textfield.layer.masksToBounds =YES;

}

}



2.代理方法 需要引入：<UISearchBarDelegate>

#pragma mark 输入内容就会触发

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText

{

NSLog(@"1");

}

#pragma mark 点击搜索栏中的textFiled触发

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar

{

_textfield.placeholder =@"输入书名/作者";

//弹出键盘的一瞬间 给背景加了一层灰色蒙版，用于点击回首键盘。

_buttonBackground = [MyButtonmakeButtonFrame:CGRectMake(0,40, 320, 568 -40) withButtonBackGroundColor:[UIColorcolorWithWhite:0.1alpha:0.1]withButtonBackImageName:nilwithButtonTitle:nilwithButtonTitleColor:nilwithButtonTitleFont:nil];

[_buttonBackgroundaddTarget:selfaction:@selector(buttonSearch)forControlEvents:UIControlEventTouchUpInside];

[self.viewaddSubview:_buttonBackground];

}

#pragma mark 点击search跳到搜索结果页

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar

{

CartoonSearchViewController *vc = [[CartoonSearchViewControlleralloc]init];

[self.navigationControllerpushViewController:vc animated:YES];

}