iOS UITextField实现实时搜索功能
创建textField

 self.searchTabble.tableHeaderView = bgView;
    self.searchFIeld = [[UITextField alloc]init];
    self.searchFIeld.frame = CGRectMake(15*SCREEN_SCALE, 10*SCREEN_SCALE, SCREENW-30*SCREEN_SCALE, 34*SCREEN_SCALE);
    [self setRightViewWithTextField:self.searchFIeld imageName:@"搜索"];
    self.searchFIeld.placeholder = @"请输入停车场名称";
    self.searchFIeld.borderStyle= UITextBorderStyleRoundedRect;
    self.searchFIeld.keyboardType = UIKeyboardTypeWebSearch;
    [self.searchFIeld addTarget:self action:@selector(textFieldDidChange) forControlEvents:UIControlEventEditingChanged];
    self.searchFIeld.delegate = self;
    self.searchFIeld.clearButtonMode = UITextFieldViewModeWhileEditing;
    [bgView addSubview:self.searchFIeld];

实现代理方法

- (void)textFieldDidChange {
    if (self.searchFIeld.text != nil && self.searchFIeld.text.length > 0) {
        self.listFilterTeamsArray = [NSMutableArray array];
        for (NSMutableDictionary *dic in self.parkArray) {
            NSString * name = [dic objectForKey:@"parkName"];
            if ([name rangeOfString:self.searchFIeld.text options:NSCaseInsensitiveSearch].length > 0) {
                [self.listFilterTeamsArray addObject:dic];
                [self.searchTabble reloadData];
            }
        }
    }
    [self.searchTabble reloadData];
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
    return YES;
    
}
- (void)textFieldDidBeginEditing:(UITextField *)textField{
    self.searchFIeld.text=@"";
    [self.historyArray removeAllObjects];
    [self.searchTabble reloadData];
    
}
- (void)textFieldDidEndEditing:(UITextField *)textField{
    [self.searchTabble reloadData];
}

核心功能如此，根据字段文字进行搜索实时显示，不搜索显示全部，搜索显示相关内容，不需要后台，直接客户端实现。文中变量自行脑补。
是不是一目了然。简单粗暴，每天更新一个iOS小功能，喜欢的记得点赞加关注哦