UISearchBar基本使用，设置颜色和字体大小

废话不多说，直接上代码
//写一个背景View，贴在导航控制器上
UIView *BJview = [[UIView alloc] initWithFrame:CGRectMake(40, 33, 
self.view.frame.size.width - 80, 40)];
self.navigationItem.titleView = BJview;

//创建seachBar
self.seachBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, BJview.bounds.size.width, 40)];
//去掉seachBar的黑线
self.seachBar.backgroundImage = [UIImage new];
self.seachBar.delegate = self;
self.seachBar.placeholder = @"请输入要搜索的内容";
//成为键盘的第一响应者
[self.seachBar becomeFirstResponder];
[BJview addSubview:self.seachBar];

//通过KVC拿到textField
UITextField  *seachTextFild = [self.seachBar valueForKey:@"searchField"];
拿到textField之后就可以肆意妄为了
//修改字体颜色
seachTextFild.textColor = [UIColor redColor];
//修改字体大小
seachTextFild.font = [UIFont systemFontOfSize:14];

//修改光标颜色
[seachTextFild setTintColor:[UIColor colorWithRed:35/255.0 green:185/255.0 blue:165/255.0 alpha:1.0]];
//更改searchBar 中PlaceHolder 字体颜色
[searchField setValue:[UIColor blackColor] forKeyPath:@"_placeholderLabel.textColor"];
  
self.seachTextFild = seachTextFild;

//修改搜索图标
UIImageView *img = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"sear"]];
img.frame = CGRectMake(10, 0,20,20);
self.searchField.leftView = img;
self.searchField.leftViewMode = UITextFieldViewModeAlways;

//修改clearButton
UIButton *clearButton = [self.searchField valueForKey:@"_clearButton"];
[clearButton setImage:[UIImage imageNamed:@"dele.png"] forState:UIControlStateNormal];

D68CB859-5F35-4CDF-A8F5-2601132829F0.png

UISearchBar 的代理方法

//代理方法  实时监听输入框的文字变动
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{

    NSLog(@"%@",searchText);

}

//searchBar的确定点击事件
-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{

    NSLog(@"%@",self.seachBar.text);

}

将要开始编辑时的回调，返回为NO，则不能编辑
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar;

已经开始编辑时的回调
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar;

将要结束编辑时的回调
- (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar;

已经结束编辑的回调
- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar;

编辑文字改变前的回调，返回NO则不能加入新的编辑文字
-(BOOL)searchBar: (UISearchBar )searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString )text;

书本按钮点击的回调
- (void)searchBarBookmarkButtonClicked:(UISearchBar *)searchBar;

取消按钮点击的回调
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar;

搜索结果按钮点击的回调
- (void)searchBarResultsListButtonClicked:(UISearchBar *)searchBar;

搜索栏的附加试图中切换按钮触发的回调
-(void)searchBar:(UISearchBar*)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope;