UISearchBar去掉SearchBar上面两条分割线

设置之前:

设置之后:

代码如下:

//
//  ViewController.m
//  UISearchBarDemo
//
//  Created by 思 彭 on 17/3/24.
//  Copyright © 2017年 思 彭. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()<UISearchBarDelegate>

@property (nonatomic, strong) UISearchBar *searchBar;/**<搜索框 */

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"UISearchBar";
    [self setupSearchBar];
    [self setSearchBar];
}

//添加搜索框
- (void)setupSearchBar {

    self.searchBar = [[UISearchBar alloc]init];
    self.searchBar.frame = CGRectMake(, , self.view.frame.size.width, );
    self.searchBar.delegate = self;
//    self.searchBar.searchBarStyle =UISearchBarStyleMinimal;
    self.searchBar.barTintColor = [UIColor colorWithRed:238.0/ green:238.0/ blue:238.0/ alpha:1.0];

    // 去除了分割线,需要设置背景颜色
    self.searchBar.backgroundColor = [UIColor colorWithRed:238.0/ green:238.0/ blue:238.0/ alpha:1.0];
    [self.searchBar setAutocapitalizationType:UITextAutocapitalizationTypeNone];
    self.searchBar.placeholder = @"搜索";
    [self.searchBar sizeToFit];
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapClick:)];
    [self.navigationController.navigationBar addGestureRecognizer:tap];
    [self.view addSubview:self.searchBar];
}

// 去掉SearchBar上面两条线
- (void)setSearchBar {

    for (UIView *obj in [self.searchBar subviews]) {
        for (UIView *objs in [obj subviews]) {
            if ([objs isKindOfClass:NSClassFromString(@"UISearchBarBackground")]){
                [objs removeFromSuperview];
            }
        }
        if ([obj isKindOfClass:NSClassFromString(@"UISearchBarBackground")]){
            [obj removeFromSuperview];
        }
    }
}

 #pragma marl - UISearchBarDelegate

- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {

     self.searchBar.showsCancelButton = YES;
     return YES;
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {

     self.searchBar.showsCancelButton = NO;
     searchBar.text = @"";
     [self.searchBar resignFirstResponder];
}

- (void)tapClick:(UITapGestureRecognizer *)tap {

     self.searchBar.showsCancelButton = NO;
     [self.searchBar resignFirstResponder];
}

 //点击搜索按钮
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {

     self.searchBar.showsCancelButton = NO;
     [searchBar resignFirstResponder];
}

@end