popover window on iphone (代码实现) UIPopoverController的使用

其实最关键的代码就是这两个了。

IMPopoverController.h

 1 IMPopoverController.h
 2 //  IMPopoverController
 3 //
 4 //  Created by yoyokko on 10-8-28.
 5 //  Copyright 2010 [email]yoyokko@gmail.com[/email]. All rights reserved.
 6 //
 7  
 8 #import <foundation foundation.h="">
 9  
10 @interface IMWindow : UIWindow
11 {
12     id delegate_;
13 }
14  
15 @property (nonatomic, assign) id delegate;
16  
17 @end
18  
19  
20 @interface IMPopoverController : NSObject {
21     UIViewController    *contentViewController_;
22     IMWindow    *popOverWindow_;
23     CGSize    popOverSize_;
24 }
25  
26 @property (nonatomic) CGSize popOverSize;
27  
28 - (id) initWithContentViewController:(UIViewController *) con;
29 - (UIViewController *) contentViewController;
30 - (void) setContentViewController:(UIViewController *) newCon animated:(BOOL) animated;
31  
32 - (void) presentPopoverFromRect:(CGRect) rect inView:(UIView *) inView animated:(BOOL) animated;
33 - (void) dismissPopoverAnimated:(BOOL) animated;
34  
35 @end
36 </foundation>

IMPopoverController.m

  1 //
  2 //  IMPopoverController.m
  3 //  IMPopoverController
  4 //
  5 //  Created by yoyokko on 10-8-28.
  6 //  Copyright 2010 [email]yoyokko@gmail.com[/email]. All rights reserved.
  7 //
  8  
  9 #import "IMPopoverController.h"
 10  
 11 @implementation IMWindow
 12  
 13 @synthesize delegate = delegate_;
 14  
 15 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
 16 {
 17     [self.delegate touchesEnded:touches withEvent:event];
 18 }
 19  
 20 @end
 21  
 22  
 23 @interface IMPopoverController (Private)
 24  
 25 @property (nonatomic, retain) IMWindow *popOverWindow;
 26  
 27 @end
 28  
 29  
 30 @implementation IMPopoverController
 31  
 32 @synthesize popOverSize = popOverSize_;
 33  
 34 - (UIWindow *) popOverWindow
 35 {
 36     return popOverWindow_;
 37 }
 38  
 39 - (void) setPopOverWindow:(UIWindow *) newValue
 40 {
 41     if (popOverWindow_ != newValue)
 42     {
 43         [popOverWindow_ release];
 44         popOverWindow_ = [newValue retain];
 45     }
 46 }
 47  
 48 - (id) initWithContentViewController:(UIViewController *) con
 49 {
 50     if (self = [super init]) {
 51          
 52         self.popOverWindow = [[[IMWindow alloc] initWithFrame:CGRectMake(0, 0, 320, 480)] autorelease];
 53         self.popOverWindow.windowLevel = UIWindowLevelAlert;
 54         self.popOverWindow.backgroundColor = [UIColor clearColor];
 55         self.popOverWindow.hidden = YES;
 56         self.popOverWindow.delegate = self;
 57          
 58         [self setContentViewController:con animated:NO];
 59     }
 60     return self;
 61 }
 62  
 63 - (UIViewController *) contentViewController
 64 {
 65     return contentViewController_;
 66 }
 67  
 68 - (void) setContentViewController:(UIViewController *) newCon animated:(BOOL) animated
 69 {
 70     if (contentViewController_ != newCon) {
 71         [contentViewController_ release];
 72         contentViewController_ = newCon;
 73     }
 74 }
 75  
 76 - (void) presentPopoverFromRect:(CGRect) rect inView:(UIView *) inView animated:(BOOL) animated
 77 {
 78     UIWindow *mainWin = [[[UIApplication sharedApplication] delegate] window];
 79     CGRect newFrame = [mainWin convertRect:rect fromWindow:mainWin];
 80     [[self contentViewController].view setFrame:CGRectMake(newFrame.origin.x, newFrame.origin.y, self.popOverSize.width, self.popOverSize.height)];
 81     [self.popOverWindow addSubview:[self contentViewController].view];
 82     self.popOverWindow.hidden = NO;
 83     [self.popOverWindow makeKeyWindow];
 84 }
 85  
 86 - (void) dismissPopoverAnimated:(BOOL) animated
 87 {
 88     [self.popOverWindow resignKeyWindow];
 89     self.popOverWindow.hidden = YES;
 90 }
 91  
 92 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
 93 {
 94     [self dismissPopoverAnimated:YES];
 95 }
 96  
 97 - (void) dealloc
 98 {
 99     self.popOverWindow = nil;
100     [super dealloc];
101 }
102  
103 @end

附件是实例代码

IMPopOverController.zip

UIPopoverController的使用

1、初始化UIPopoverController

UIPopoverController *popover = [[UIPopoverController alloc]initWithContentViewController:navigationController];

//必须是个 ViewController

/*且该 ViewController的 viewDidLoad方法中要设置其在popover中的尺寸，如

self.contentSizeForViewInPopover = CGSizeMake(300.0, 280.0);

self.recentSearchesPopoverController = popover;

recentSearchesPopoverController.delegate = self;　　　　//self要实现UIPopoverControllerDelegate协议

2、设置当popover弹出时，用户仍可以交互的视图

// Ensure the popover is not dismissed if the user taps in the search bar.

popover.passthroughViews = [NSArray arrayWithObject:searchBar];

3、展现popover

[self.recentSearchesPopoverControllerpresentPopoverFromRect:self.searchBar.bounds

inView:self.searchBar

permittedArrowDirections:UIPopoverArrowDirectionAny

animated:NO];

4、消失popover

//dismiss the popover.

[recentSearchesPopoverController dismissPopoverAnimated:YES];

5、实现 UIPopoverControllerDelegate协议的方法

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

}