iphone 模仿百度输入框提示

iphone 的UITextField 模仿百度搜索提示，达到输入正确E-mail地址，详细实现如下：

#import <UIKit/UIKit.h>

@interface DemoMailViewController : UIViewController<UITextFieldDelegate,UITableViewDelegate,UITableViewDataSource>

{

UITextField *mailTextField;

UITableView *myTableView;

NSMutableArray *promptarray;

NSMutableArray *myArr;

}

@property (nonatomic,retain) IBOutlet UITextField *mailTextField;

@property (nonatomic,retain) IBOutlet UITableView *myTableView;

@property (nonatomic,retain) NSMutableArray *myArr;

-(IBAction) textFieldDoneEditing:(id)sender;

@end

#import "DemoMailViewController.h"

@implementation DemoMailViewController

@synthesize mailTextField,myTableView;

@synthesize myArr;

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.

- (void)viewDidLoad 

{

myTableView.hidden=YES;

    [super viewDidLoad];

}

-(IBAction) textFieldDoneEditing:(id)sender

{

[sender resignFirstResponder];

}

//文本框开始输入的时候

-(void)textFieldDidBeginEditing:(UITextField *)textField

{

self.myArr=[[NSMutableArray alloc] init];

[mailTextField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];

}

//结束输入的时候

-(void)textFieldDidEndEditing:(UITextField *)textField

{

myTableView.hidden=YES;

}

//显示提示的选项

- (void) textFieldDidChange:(UITextField *) TextField

{

myTableView.hidden=YES;

promptarray=[[NSArray alloc]initWithObjects:@"@qq.com",@"@163.com",@"@gmail.com",@"@sina.com",@"@foxmail.com",@"@sohu.com",@"@163.com",@"@tom.com",@"@yeah.com",@"@yahoo.com.cn",nil];

[self.myArr removeAllObjects];

int i;

for(i=0;i<[promptarray count];i++)

{

NSMutableString *add=[[NSMutableString alloc] initWithString:TextField.text];

[add appendString:[promptarray objectAtIndex:i]];

[self.myArr addObject:add];

}

myTableView.hidden=NO;

[myTableView reloadData];

}

////随便点击外面刷新试图

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

[mailTextField resignFirstResponder];

}

#pragma mark tableView delegate and dataSource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 

{

return 1;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 

{

return [self.myArr count];

}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

{   

return 48;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{  

NSUInteger row=[indexPath row];

static NSString *CellIdentifier = @"Cell";

    

    UITableViewCell *cell = [myTableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {

        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

    }

if (myArr&&[myArr count]) 

{

cell.textLabel.text =[myArr objectAtIndex:row];; 

}

return cell;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    mailTextField.text = [myArr objectAtIndex:indexPath.row];

myTableView.hidden=YES;

}