iOS开发之自定义SearchBar导航条右侧显示放大镜

1 #import <UIKit/UIKit.h>
2 
3 @interface searchView : UITextField
4 
5 @end

 1 -(id)initWithFrame:(CGRect)frame
 2 {
 3 self = [super initWithFrame:frame];
 4 if(self){
 5 [self searchView]; //调用searchView方法
 6 }
 7 }
 8 
 9 #pragma mark 实现searchView方法
10 -(void)searchView
11 {
12 self.placeholder = @"搜索店铺或者商品";
13 //设置textField的样式
14 self.borderStyle = UITextBorderStyleRoundedRect;
15 //设置键盘的return键 的样式 我们更改为search字样
16 self.returnKeyType = UIReturnKeySearch;
17 //创建imageView对象
18 UIImageView * imgView = [[UIImageView alloc]init];
19 //设置 imgVIew的用户可交互性
20  imgView.userInteractionEnabled = YES;
21 //给 imgView赋值  tabbar_discover是一个放大镜图片
22  imgView.image = [UIImage imageNamed:@"tabbar_discover"];
23 //设置self (textField)的 rightView属性和 rightViewMode的属性
24 self.rightView = imgView;
25 self.rightViewMode = UITextFieldViewModeAlways;
26 //向 这张图片添加一个手势
27 UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(btnClick:)];
28 [imgView addGestureRecognizer:tap];
29 
30 
31 }
32 //实现按钮点击事件
33 -(void)btnClick:(UIButton *)btn
34 {
35     NSLog(@" 111111111111%@",self.text);
36     NSLog(@"5555");
37 }

 1 #import "ViewController.h"
 2 #import "searchView.h"
 3 
 4 @interface ViewController ()<UITextFieldDelegate>
 5 {
 6     searchView * search;
 7 }
 8 @end
 9 
10 @implementation ViewController
11 
12 - (void)viewDidLoad {
13     [super viewDidLoad];
14     
15     search = [[searchView alloc]initWithFrame:CGRectMake(20, 20, 280, 40)];
16     search.delegate = self;
17     search.layer.cornerRadius = 20;
18     search.clipsToBounds = YES;
19     [self.view addSubview:search];
20   
21     
22 }
23 - (BOOL)textFieldShouldReturn:(UITextField *)textField
24 {
25     NSLog(@"%@",search.text);
26     return YES;
27 }