UIPopoverController的使用，看着很牛逼的样子
先看看这个图
要做的样子就是点击下面这个按钮，弹出上面这个带箭头的弹出框
下面来看看怎么搞
- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view from its nib. isChelsea = NO; //添加完成按钮 UISegmentedControl* doneButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Done", nil]]; [doneButton setSegmentedControlStyle:UISegmentedControlStyleBar]; [doneButton setFrame:CGRectMake(self.view.bounds.origin.x+self.view.bounds.size.width-100, self.view.bounds.origin.y+5, 75, 50)]; [doneButton addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; [self.view addSubview:doneButton]; [doneButton release]; //添加选择项 UISegmentedControl* clubSeg = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Chelsea",@"AC Milan",@"Livupoor",@"Asenal",nil]]; [clubSeg setSegmentedControlStyle:UISegmentedControlStyleBar]; [clubSeg setFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+75,self.view.bounds.size.width,50)]; [clubSeg addTarget:self action:@selector(chooseClub:) forControlEvents:UIControlEventValueChanged];[self.view addSubview:clubSeg]; [clubSeg release]; //添加选择列表 UIPickerView* picker = [[UIPickerView alloc] initWithFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+150, self.view.bounds.size.width,self.view.bounds.size.height)]; [picker setBounds:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+75, self.view.bounds.size.width,self.view.bounds.size.height)]; picker.delegate = self; picker.dataSource = self; picker.showsSelectionIndicator = YES; [self.view addSubview:picker]; [picker setTag:101]; [picker release];}-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 1;}-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ return 12;}-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (isChelsea) { return [NSString stringWithCString:chelsea[row] encoding:NSUTF8StringEncoding]; }else{ return [NSString stringWithFormat:@"chelsea_%d",arc4random()%12]; ; } }-(void)segmentAction:(UISegmentedControl*)seg{ [self.view removeFromSuperview]; [self.popover dismissPopoverAnimated:YES];}-(void)chooseClub:(UISegmentedControl*)seg{ NSInteger index = seg.selectedSegmentIndex; UIPickerView* picker = (UIPickerView*)[self.view viewWithTag:101]; switch (index) { case 0:{ NSLog(@"you choose Chelsea"); isChelsea = YES; [picker reloadAllComponents]; break; } case 1: NSLog(@"you choose AC Milan"); isChelsea = NO; [picker reloadAllComponents]; case 2: NSLog(@"you choose Livopoor"); isChelsea = NO; [picker reloadAllComponents]; case 3: NSLog(@"you choose Asenal"); isChelsea = NO; [picker reloadAllComponents]; default: break; }}@end@property(nonatomic,retain)UIPopoverController* popover;@end#import <UIKit/UIKit.h>@interface UIActionSheetDemoViewController : UIViewController<UIPopoverControllerDelegate>{ UIPopoverController* _popover;}#import "UIActionSheetDemoViewController.h"#import "popController.h"@implementation UIActionSheetDemoViewController@synthesize popover = _popover;- (void)didReceiveMemoryWarning{ // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use.}#pragma mark - View lifecycle// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.- (void)viewDidLoad{ [super viewDidLoad]; UISegmentedControl* settingView = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"FootballCF",@"BasketballCF",nil]]; [settingView setSegmentedControlStyle:UISegmentedControlStyleBar]; [settingView setFrame:CGRectMake(500, 900, 160, 75)]; [settingView setNeedsLayout]; [settingView addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; [self.view addSubview:settingView]; [settingView release];}- (void)viewDidUnload{ [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; if (self.popover != nil) { [self.popover release]; self.popover = nil; }}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{ // Return YES for supported orientations return YES;}-(void)segmentAction:(UISegmentedControl*)seg{ //清除已经显示的弹出窗口 if (self.popover.popoverVisible) { [self.popover dismissPopoverAnimated:YES]; } //初始化待显示控制器 popController* controller = [[popController alloc] init]; //设置待显示控制器的范围 [controller.view setFrame:CGRectMake(550, 490, 350, 450)]; //设置待显示控制器视图的尺寸 controller.contentSizeForViewInPopover = CGSizeMake(350, 450); //初始化弹出窗口 UIPopoverController* pop = [[UIPopoverController alloc] initWithContentViewController:controller]; controller.popover = pop; self.popover = pop; self.popover.delegate = self; //设置弹出窗口尺寸 self.popover.popoverContentSize = CGSizeMake(350, 450); //显示，其中坐标为箭头的坐标以及尺寸 [self.popover presentPopoverFromRect:CGRectMake(550, 890, 10, 10) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionDown animated:NO]; [controller release]; [pop release]; //[self.popover dismissPopoverAnimated:YES];}-(void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController{ NSLog(@"popover dismiss");}@end#import <UIKit/UIKit.h>@interface popController : UIViewController<UIPickerViewDelegate,UIPickerViewDataSource>{ UIPopoverController* _popover; BOOL isChelsea;}@property(nonatomic,retain)UIPopoverController* popover;@end#import "popController.h"@implementation popController@synthesize popover = _popover;//定义选项显示内容const char* chelsea[12] = {"博阿斯","切赫","阿什利科尔","特里","路易斯","伊万诺维奇","兰帕德","拉米雷斯","梅来雷斯","阿内尔卡","德罗巴","托雷斯"};- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{ self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self;}- (void)didReceiveMemoryWarning{ // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use.}#pragma mark - View lifecycle- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view from its nib. isChelsea = NO; //添加完成按钮 UISegmentedControl* doneButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Done", nil]]; [doneButton setSegmentedControlStyle:UISegmentedControlStyleBar]; [doneButton setFrame:CGRectMake(self.view.bounds.origin.x+self.view.bounds.size.width-100, self.view.bounds.origin.y+5, 75, 50)]; [doneButton addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; [self.view addSubview:doneButton]; [doneButton release]; //添加选择项 UISegmentedControl* clubSeg = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Chelsea",@"AC Milan",@"Livupoor",@"Asenal",nil]]; [clubSeg setSegmentedControlStyle:UISegmentedControlStyleBar]; [clubSeg setFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+75,self.view.bounds.size.width,50)]; [clubSeg addTarget:self action:@selector(chooseClub:) forControlEvents:UIControlEventValueChanged];[self.view addSubview:clubSeg]; [clubSeg release]; //添加选择列表 UIPickerView* picker = [[UIPickerView alloc] initWithFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+150, self.view.bounds.size.width,self.view.bounds.size.height)]; [picker setBounds:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+75, self.view.bounds.size.width,self.view.bounds.size.height)]; picker.delegate = self; picker.dataSource = self; picker.showsSelectionIndicator = YES; [self.view addSubview:picker]; [picker setTag:101]; [picker release];}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{ // Return YES for supported orientations return YES;}-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 1;}-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ return 12;}-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (isChelsea) { return [NSString stringWithCString:chelsea[row] encoding:NSUTF8StringEncoding]; }else{ return [NSString stringWithFormat:@"chelsea_%d",arc4random()%12]; ; } }-(void)segmentAction:(UISegmentedControl*)seg{ [self.view removeFromSuperview]; [self.popover dismissPopoverAnimated:YES];}-(void)chooseClub:(UISegmentedControl*)seg{ NSInteger index = seg.selectedSegmentIndex; UIPickerView* picker = (UIPickerView*)[self.view viewWithTag:101]; switch (index) { case 0:{ NSLog(@"you choose Chelsea"); isChelsea = YES; [picker reloadAllComponents]; break; } case 1: NSLog(@"you choose AC Milan"); isChelsea = NO; [picker reloadAllComponents]; case 2: NSLog(@"you choose Livopoor"); isChelsea = NO; [picker reloadAllComponents]; case 3: NSLog(@"you choose Asenal"); isChelsea = NO; [picker reloadAllComponents]; default: break; }}@end@property(nonatomic,retain)UIPopoverController* popover;@end#import <UIKit/UIKit.h>@interface UIActionSheetDemoViewController : UIViewController<UIPopoverControllerDelegate>{ UIPopoverController* _popover;}#import "UIActionSheetDemoViewController.h"#import "popController.h"@implementation UIActionSheetDemoViewController@synthesize popover = _popover;- (void)didReceiveMemoryWarning{ // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use.}#pragma mark - View lifecycle// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.- (void)viewDidLoad{ [super viewDidLoad]; UISegmentedControl* settingView = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"FootballCF",@"BasketballCF",nil]]; [settingView setSegmentedControlStyle:UISegmentedControlStyleBar]; [settingView setFrame:CGRectMake(500, 900, 160, 75)]; [settingView setNeedsLayout]; [settingView addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; [self.view addSubview:settingView]; [settingView release];}- (void)viewDidUnload{ [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; if (self.popover != nil) { [self.popover release]; self.popover = nil; }}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{ // Return YES for supported orientations return YES;}-(void)segmentAction:(UISegmentedControl*)seg{ //清除已经显示的弹出窗口 if (self.popover.popoverVisible) { [self.popover dismissPopoverAnimated:YES]; } //初始化待显示控制器 popController* controller = [[popController alloc] init]; //设置待显示控制器的范围 [controller.view setFrame:CGRectMake(550, 490, 350, 450)]; //设置待显示控制器视图的尺寸 controller.contentSizeForViewInPopover = CGSizeMake(350, 450); //初始化弹出窗口 UIPopoverController* pop = [[UIPopoverController alloc] initWithContentViewController:controller]; controller.popover = pop; self.popover = pop; self.popover.delegate = self; //设置弹出窗口尺寸 self.popover.popoverContentSize = CGSizeMake(350, 450); //显示，其中坐标为箭头的坐标以及尺寸 [self.popover presentPopoverFromRect:CGRectMake(550, 890, 10, 10) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionDown animated:NO]; [controller release]; [pop release]; //[self.popover dismissPopoverAnimated:YES];}-(void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController{ NSLog(@"popover dismiss");}@end#import <UIKit/UIKit.h>@interface popController : UIViewController<UIPickerViewDelegate,UIPickerViewDataSource>{ UIPopoverController* _popover; BOOL isChelsea;}@property(nonatomic,retain)UIPopoverController* popover;@end#import "popController.h"@implementation popController@synthesize popover = _popover;//定义选项显示内容const char* chelsea[12] = {"博阿斯","切赫","阿什利科尔","特里","路易斯","伊万诺维奇","兰帕德","拉米雷斯","梅来雷斯","阿内尔卡","德罗巴","托雷斯"};- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{ self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self;}- (void)didReceiveMemoryWarning{ // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use.}#pragma mark - View lifecycle- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view from its nib. isChelsea = NO; //添加完成按钮 UISegmentedControl* doneButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Done", nil]]; [doneButton setSegmentedControlStyle:UISegmentedControlStyleBar]; [doneButton setFrame:CGRectMake(self.view.bounds.origin.x+self.view.bounds.size.width-100, self.view.bounds.origin.y+5, 75, 50)]; [doneButton addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; [self.view addSubview:doneButton]; [doneButton release]; //添加选择项 UISegmentedControl* clubSeg = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Chelsea",@"AC Milan",@"Livupoor",@"Asenal",nil]]; [clubSeg setSegmentedControlStyle:UISegmentedControlStyleBar]; [clubSeg setFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+75,self.view.bounds.size.width,50)]; [clubSeg addTarget:self action:@selector(chooseClub:) forControlEvents:UIControlEventValueChanged];[self.view addSubview:clubSeg]; [clubSeg release]; //添加选择列表 UIPickerView* picker = [[UIPickerView alloc] initWithFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+150, self.view.bounds.size.width,self.view.bounds.size.height)]; [picker setBounds:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y+75, self.view.bounds.size.width,self.view.bounds.size.height)]; picker.delegate = self; picker.dataSource = self; picker.showsSelectionIndicator = YES; [self.view addSubview:picker]; [picker setTag:101]; [picker release]; }- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{ // Return YES for supported orientations return YES;}-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 1;}-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ return 12;}-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (isChelsea) { return [NSString stringWithCString:chelsea[row] encoding:NSUTF8StringEncoding]; }else{ return [NSString stringWithFormat:@"chelsea_%d",arc4random()%12]; ; } }-(void)segmentAction:(UISegmentedControl*)seg{ [self.view removeFromSuperview]; [self.popover dismissPopoverAnimated:YES];}-(void)chooseClub:(UISegmentedControl*)seg{ NSInteger index = seg.selectedSegmentIndex; UIPickerView* picker = (UIPickerView*)[self.view viewWithTag:101]; switch (index) { case 0:{ NSLog(@"you choose Chelsea"); isChelsea = YES; [picker reloadAllComponents]; break; } case 1: NSLog(@"you choose AC Milan"); isChelsea = NO; [picker reloadAllComponents]; case 2: NSLog(@"you choose Livopoor"); isChelsea = NO; [picker reloadAllComponents]; case 3: NSLog(@"you choose Asenal"); isChelsea = NO; [picker reloadAllComponents]; default: break; }}@end