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SASearchBar.h
#import <UIKit/UIKit.h>
 
@interface SASearchBar : UISearchBar
 
@property (nonatomic, strong)   UITextField     *textField;
 
@property (nonatomic, strong)   UIButton        *searchBtn;
 
@end

SASearchBar.h #import <UIKit/UIKit.h> @interface SASearchBar : UISearchBar @property (nonatomic, strong) UITextField *textField; @property (nonatomic, strong) UIButton *searchBtn; @end

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#import "SASearchBar.h"
@implementation SASearchBar
#pragma mark 初始化
- (id)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        // 设置背景色为透明，这句在ios6中很重要！！
        self.backgroundColor = [UIColor clearColor];
        self.placeholder = @"搜索号码或姓名";
    }
    return self;
}
 
#pragma mark 调整子控件
- (void)layoutSubviews
{
    [super layoutSubviews];
 
    UIView *baseView = iOS7 ? [self.subviews firstObject] : self;
 
    // 移除背景图片
    [[baseView.subviews firstObject] removeFromSuperview];
 
    // 获取TextField
    self.textField = [baseView.subviews firstObject];
    self.textField.leftView = nil;
    self.textField.background = nil;
    self.textField.backgroundColor = [UIColor clearColor];
    self.textField.frame = CGRectMake(0, 0, baseView.frame.size.width - 30, 44);
 
    // 创建搜索按钮
    self.searchBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    UIImage *searchIcn = [UIImage imageNamed:@"icon_invite_search_btn.png"];
    [self.searchBtn setImage:searchIcn forState:UIControlStateNormal];
    self.searchBtn.frame = CGRectMake(baseView.frame.size.width - 30, 10, 20, 20);
    [baseView addSubview:self.searchBtn];
 
    NSLog(@"%@", self.subviews);
}
 
#pragma mark 绘制背景图片
- (void)drawRect:(CGRect)rect
{
    UIImage *image = [UIImage resizeImage:@"textField_line_selected.png"];
    [image drawInRect:CGRectMake(0, 0, rect.size.width, rect.size.height)];
}
@end

#import "SASearchBar.h" @implementation SASearchBar #pragma mark 初始化 - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { // 设置背景色为透明，这句在ios6中很重要！！ self.backgroundColor = [UIColor clearColor]; self.placeholder = @"搜索号码或姓名"; } return self; } #pragma mark 调整子控件 - (void)layoutSubviews { [super layoutSubviews]; UIView *baseView = iOS7 ? [self.subviews firstObject] : self; // 移除背景图片 [[baseView.subviews firstObject] removeFromSuperview]; // 获取TextField self.textField = [baseView.subviews firstObject]; self.textField.leftView = nil; self.textField.background = nil; self.textField.backgroundColor = [UIColor clearColor]; self.textField.frame = CGRectMake(0, 0, baseView.frame.size.width - 30, 44); // 创建搜索按钮 self.searchBtn = [UIButton buttonWithType:UIButtonTypeCustom]; UIImage *searchIcn = [UIImage imageNamed:@"icon_invite_search_btn.png"]; [self.searchBtn setImage:searchIcn forState:UIControlStateNormal]; self.searchBtn.frame = CGRectMake(baseView.frame.size.width - 30, 10, 20, 20); [baseView addSubview:self.searchBtn]; NSLog(@"%@", self.subviews); } #pragma mark 绘制背景图片 - (void)drawRect:(CGRect)rect { UIImage *image = [UIImage resizeImage:@"textField_line_selected.png"]; [image drawInRect:CGRectMake(0, 0, rect.size.width, rect.size.height)]; } @end