UIPopoverController，弹出框，_综合

UIPopoverController只能在ipad设备上面使用；作用是用于显示临时内容，特点是总是显示在当前视图最前端，有一个箭头可以指示从哪一个button弹出来的，当单击界面的其他地方时自动消失。

（1）创建两个UIViewController类（ListViewController和oneViewController）

ListViewController作为一个弹出的控制器视图显示

（2）建好弹出视图显示些什么，就是弹出一个表。

#import <UIKit/UIKit.h>  @interface ListViewController : UIViewController <UITableViewDelegate,UITableViewDataSource>  @property (strong,nonatomic)UITableView *favoriteTableView;//收藏夹table view  @property (strong,nonatomic)NSMutableArray *list;//收藏夹list  @end

#import "ListViewController.h"  
#import "threeViewController.h"  
@interface ListViewController ()  @end  @implementation ListViewController  - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil  
{  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];  if (self) {  // Custom initialization  }  return self;  
}  - (void)viewDidLoad  
{  [super viewDidLoad];  self.list = [[NSMutableArray alloc] initWithObjects:@"willingseal",@"http://blog.csdn.net/willingseal?viewmode=contents",@"有些事不是因为看到了希望才去坚持，而是坚持了才会看到了希望",@"爱情", nil nil];  [self addTableview];  }  - (void)didReceiveMemoryWarning  
{  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated.  
}  //初始化table view  
-(void) addTableview {  self.favoriteTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, 400,500) style:UITableViewStylePlain];//初始化tabview  //    self.favoriteTableView.center =CGPointMake(self.view.center.x, self.view.center.y-70);//tableview的中心位置  self.favoriteTableView.delegate = self;  self.favoriteTableView.dataSource=self;  self.favoriteTableView.scrollEnabled=YES;//tabview是否滑动  //    self.favoriteTableView.layer.cornerRadius=15;//圆角大小  //    _loginTableView = TableView;  self.favoriteTableView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"bg.png"]];  [self.view addSubview:self.favoriteTableView];  }  #pragma mark - Table view data source  //行高  
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath  
{  return 50;  
}  //多少个section  
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView  
{  return 1;  }  //section里面有多少行  
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)sectionIndex  
{  NSLog(@"list is :%lu",[self.list count]);  return [self.list count];;  
}  //cell内容  
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath  
{  static NSString *CellIdentifier = @"cell";  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];  if (cell ==nil) {  cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];  cell.selectionStyle = UITableViewCellSelectionStyleNone;  }  NSInteger row = [indexPath row];  cell.textLabel.text = [self.list objectAtIndex:row];  return cell;  
}  //点击某个table view cell  
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{  NSString * selectStr =[[NSString alloc] initWithFormat:@"%@",[self.list objectAtIndex:indexPath.row]];  NSLog(@"%@",[self.list objectAtIndex:indexPath.row]);  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"willingseal" message:selectStr delegate:self cancelButtonTitle:@"ok" otherButtonTitles: nil nil];  [alert show];  }  @end

（3）点击button，弹出表

#import <UIKit/UIKit.h>  
#import "ListViewController.h"  
@interface oneViewController : UIViewController <UIPopoverControllerDelegate>{  UIPopoverController *popoverController;  
}  - (IBAction)tap:(UIButton *)sender;  @end

- (IBAction)tap:(UIButton *)sender {  ListViewController *listVC =[[ListViewController alloc] init];//初始化ListViewController  popoverController = [[UIPopoverController alloc] initWithContentViewController:listVC];//初始化popoverController－UIPopoverController该控制器的内容必须由一个控制器ViewController提供  [popoverController setPopoverContentSize:CGSizeMake(400, 500)];//设置popoverController的内容大小  [popoverController setDelegate:self];//设置popoverController代理  [popoverController presentPopoverFromRect:sender.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];//－第三个参数permittedArrowDirections是设置那个款箭头的方向，可以向上／下／左／右不同方向弹出－－弹出带箭头的窗口，这一种方法是用在view上弹出窗口，另一种用在导航栏（UIBarButtonItem）弹出窗口- (void)presentPopoverFromBarButtonItem:(UIBarButtonItem *)item permittedArrowDirections:(UIPopoverArrowDirection)arrowDirections animated:(BOOL)animated;        
}  #pragma mark - popoverController  
- (BOOL)popoverControllerShouldDismissPopover:(UIPopoverController *)popoverController  
{  return YES;  
}   
//让它消失  
- (void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController  
{  NSLog(@"关闭了 PopverController ")  
}