MLPAutoCompleteTextField 带有可自动完成的下拉菜单简单使用-CSDN博客

本文链接：https://blog.csdn.net/choudang/article/details/38046199

本文介绍了如何使用MLPAutoCompleteTextField创建带有自动完成下拉菜单的效果，提供了控件的下载链接，并概述了其初始化的简单步骤。

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1.MLPAutoCompleteTextField 效果如下：

MLPAutoCompleteTextField 下载地址：https://github.com/EddyBorja/MLPAutoCompleteTextField

2.简单使用

-》控件初始化

- (void)viewDidLoad
{
    if ([[[UIDevice currentDevice] systemVersion] compare:@"6.0" options:NSNumericSearch] != NSOrderedAscending) {
        [passportField registerAutoCompleteCellClass:[CustomAutoCompleteCell class] forCellReuseIdentifier:@"CustomCellId"];
    }
    else{
        passportField.applyBoldEffectToAutoCompleteSuggestions = NO;
    }
    [passportField setAutoCompleteDataSource:self];
    [passportField setAutoCompleteDelegate:self];
    [passportField setAutoCompleteBoldFontName:FOUNDFONT];
    [passportField setAutoCompleteFontSize:17.0];
    [passportField setAutoCompleteTableBackgroundColor:[UIColor whiteColor]];
    [passportField setFont:[UIFont fontWithName:FOUNDFONT size:17]];
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

-》实现数据源

#pragma mark - MLPAutoCompleteTextField DataSource


//example of asynchronous fetch:
- (void)autoCompleteTextField:(MLPAutoCompleteTextField *)textField
 possibleCompletionsForString:(NSString *)string
            completionHandler:(void (^)(NSArray *))handler
{
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0);
    dispatch_async(queue, ^{
        NSRange range = [[textField text] rangeOfString:@"@"];//判断字符串是否包含
        if (range.length >0)//包含@不做任何动作
        {
            [self performSelectorOnMainThread:@selector(dismissAutoCompleteTable) withObject:self waitUntilDone:NO];
        }
        else//不包含@，进行自动补全
        {
            [self performSelectorOnMainThread:@selector(showAutoCompleteTable) withObject:self waitUntilDone:NO];
            NSArray *completions = [self allEmails:[textField text]];
            handler(completions);
        }
    });
}

-(void)dismissAutoCompleteTable{
    [passportField setAutoCompleteTableViewHidden:YES];
}

-(void)showAutoCompleteTable{
    [passportField setAutoCompleteTableViewHidden:NO];
}

- (NSArray *)allEmails:(NSString *)textFieldText
{
    NSMutableArray *countries = [NSMutableArray arrayWithCapacity:10];
    [countries addObject:[NSString stringWithFormat:@"%@@sogou.com",textFieldText]];
    [countries addObject:[NSString stringWithFormat:@"%@@qq.com",textFieldText]];
    [countries addObject:[NSString stringWithFormat:@"%@@sina.com",textFieldText]];
    [countries addObject:[NSString stringWithFormat:@"%@@163.com",textFieldText]];
    [countries addObject:[NSString stringWithFormat:@"%@@126.com",textFieldText]];
    return countries;
}

-》实现代理

#pragma mark - MLPAutoCompleteTextField Delegate


- (BOOL)autoCompleteTextField:(MLPAutoCompleteTextField *)textField
          shouldConfigureCell:(UITableViewCell *)cell
       withAutoCompleteString:(NSString *)autocompleteString
         withAttributedString:(NSAttributedString *)boldedString
        forAutoCompleteObject:(id<MLPAutoCompletionObject>)autocompleteObject
            forRowAtIndexPath:(NSIndexPath *)indexPath;
{
    return YES;
}

- (void)autoCompleteTextField:(MLPAutoCompleteTextField *)textField
  didSelectAutoCompleteString:(NSString *)selectedString
       withAutoCompleteObject:(id<MLPAutoCompletionObject>)selectedObject
            forRowAtIndexPath:(NSIndexPath *)indexPath
{
   
}