UIPopoverController的使用

2011-10-04 13:41

有些时候需要用到弹出窗口，这个时候UIPopoverController就有用武之地了，下面介绍一个使用UIPopoverController的示例，以供参考。实现效果如下：

为了实现这一效果并使用UIPopoverController，这里搞了两个ｃｏｎｔｒｏｌｌｅｒ，具体定义如下。

//  Created by Chelsea Wang 4209898762 on 11-10-4.

//  Copyright 2011年 __MyCompanyName__. All rights reserved.

#import <UIKit/UIKit.h>

@interface UIActionSheetDemoViewController : UIViewController<UIPopoverControllerDelegate>{

UIPopoverController* _popover;

}

//  UIActionSheetDemoViewController.m

//  UIActionSheetDemo

//

//  Created by Chelsea Wang 4209898762 on 11-10-4.

//  Copyright 2011年 __MyCompanyName__. All rights reserved.

//

#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:[NSArrayarrayWithObjects:@"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.viewpermittedArrowDirections:UIPopoverArrowDirectionDown animated:NO];

[controller release];

[pop release];

//[self.popover dismissPopoverAnimated:YES];

}

-(void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController{

NSLog(@"popover dismiss");

}

@end

//

//  popController.h

//  UIActionSheetDemo

//

//  Created by Chelsea Wang 4209898762 on 11-10-4.

//  Copyright 2011年 __MyCompanyName__. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface popController : UIViewController<UIPickerViewDelegate,UIPickerViewDataSource>{

UIPopoverController* _popover;

BOOL isChelsea;

}

@property(nonatomic,retain)UIPopoverController* popover;

@end

//  popController.m

//  UIActionSheetDemo

//

//  Created by Chelsea Wang 4209898762 on 11-10-4.

//  Copyright 2011年 __MyCompanyName__. All rights reserved.

//

#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:[NSArrayarrayWithObjects:@"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:[NSArrayarrayWithObjects:@"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];

}

- (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;

}

-(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