我实现了一个应用程序全屏图像显示正常。
几秒钟后导航栏和状态栏被隐藏，现在如果我关闭应用程序并再次打开它，导航栏将在屏幕顶部移动，状态栏与导航栏重叠
我想我必须改变一些关于 CGRect 框架的东西
请帮我
#import "KTPhotoScrollViewController.h"
#import "KTPhotoBrowserDataSource.h"
#import "KTPhotoBrowserGlobal.h"
#import "KTPhotoView.h"
const CGFloat ktkDefaultPortraitToolbarHeight = 44;
const CGFloat ktkDefaultLandscapeToolbarHeight = 33;
const CGFloat ktkDefaultToolbarHeight = 44;
#define BUTTON_DELETEPHOTO 0
#define BUTTON_CANCEL 1
@interface KTPhotoScrollViewController (KTPrivate)
- (void)setCurrentIndex:(NSInteger)newIndex;
- (void)toggleChrome:(BOOL)hide;
- (void)startChromeDisplayTimer;
- (void)cancelChromeDisplayTimer;
- (void)hideChrome;
- (void)showChrome;
- (void)swapCurrentAndNextPhotos;
- (void)nextPhoto;
- (void)previousPhoto;
- (void)toggleNavButtons;
- (CGRect)frameForPagingScrollView;
- (CGRect)frameForPageAtIndex:(NSUInteger)index;
- (void)loadPhoto:(NSInteger)index;
- (void)unloadPhoto:(NSInteger)index;
- (void)trashPhoto;
- (void)exportPhoto;
@end
@implementation KTPhotoScrollViewController
@synthesize statusBarStyle = statusBarStyle_;
@synthesize statusbarHidden = statusbarHidden_;
@synthesize my_img, imgURL;
- (void)dealloc
{
[nextButton_ release], nextButton_ = nil;
[previousButton_ release], previousButton_ = nil;
[scrollView_ release], scrollView_ = nil;
[toolbar_ release], toolbar_ = nil;
[photoViews_ release], photoViews_ = nil;
[dataSource_ release], dataSource_ = nil;
[super dealloc];
}
- (id)initWithDataSource:(id <KTPhotoBrowserDataSource>)dataSource andStartWithPhotoAtIndex:(NSUInteger)index
{
if (self = [super init]) {
startWithIndex_ = index;
dataSource_ = [dataSource retain];
// Make sure to set wantsFullScreenLayout or the photo
// will not display behind the status bar.
[self setWantsFullScreenLayout:YES];
BOOL isStatusbarHidden = [[UIApplication sharedApplication] isStatusBarHidden];
[self setStatusbarHidden:isStatusbarHidden];
self.hidesBottomBarWhenPushed = YES;
}
return self;
}
- (void)loadView
{
[super loadView];
CGRect scrollFrame = [self frameForPagingScrollView];
UIScrollView *newView = [[UIScrollView alloc] initWithFrame:scrollFrame];
[newView setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
[newView setDelegate:self];
UIColor *backgroundColor = [dataSource_ respondsToSelector:@selector(imageBackgroundColor)] ?
[dataSource_ imageBackgroundColor] : [UIColor blackColor];
[newView setBackgroundColor:backgroundColor];
[newView setAutoresizesSubviews:YES];
[newView setPagingEnabled:YES];
[newView setShowsVerticalScrollIndicator:NO];
[newView setShowsHorizontalScrollIndicator:NO];
[[self view] addSubview:newView];
scrollView_ = [newView retain];
[newView release];
nextButton_ = [[UIBarButtonItem alloc]
initWithImage:[UIImage imageNamed:@"nextIcon.png"]
style:UIBarButtonItemStylePlain
target:self
action:@selector(nextPhoto)];
previousButton_ = [[UIBarButtonItem alloc]
initWithImage:[UIImage imageNamed:@"previousIcon.png"]
style:UIBarButtonItemStylePlain
target:self
action:@selector(previousPhoto)];
UIBarButtonItem *msgButton = nil;
UIBarButtonItem *exportButton = nil;
exportButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction
target:self
action:@selector(exportPhoto)];
msgButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks
target:self
action:@selector(msgPhoto)];
// UIImage *image = [UIImage imageNamed:@"Icon-Small"];
// UIButton *myMuteButton = [UIButton buttonWithType:UIButtonTypeCustom];
// myMuteButton.bounds = CGRectMake( 0, 0, image.size.width, image.size.height );
// [myMuteButton setImage:image forState:UIControlStateNormal];
// [myMuteButton addTarget:self action:@selector(trashPhoto) forControlEvents:UIControlEventTouchUpInside];
// UIBarButtonItem *myMuteBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:myMuteButton];
UIBarItem *space = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
NSMutableArray *toolbarItems = [[NSMutableArray alloc] initWithCapacity:7];
if (exportButton) [toolbarItems addObject:exportButton];
[toolbarItems addObject:space];
[toolbarItems addObject:previousButton_];
[toolbarItems addObject:space];
[toolbarItems addObject:nextButton_];
[toolbarItems addObject:space];
if (msgButton) [toolbarItems addObject:msgButton];
// [toolbarItems addObject:myMuteBarButtonItem];
// [myMuteBarButtonItem release];
CGRect screenFrame = [[UIScreen mainScreen] bounds];
CGRect toolbarFrame = CGRectMake(0,
screenFrame.size.height - ktkDefaultToolbarHeight,
screenFrame.size.width,
ktkDefaultToolbarHeight);
toolbar_ = [[UIToolbar alloc] initWithFrame:toolbarFrame];
[toolbar_ setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleRightMargin];
[toolbar_ setBarStyle:UIBarStyleBlackTranslucent];
[toolbar_ setItems:toolbarItems];
[[self view] addSubview:toolbar_];
if (msgButton) [msgButton release];
if (exportButton) [exportButton release];
[toolbarItems release];
[space release];
}
- (void) ShowAlert:(NSString*)title MyMsg:(NSString*)msg{
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:title message:msg delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
[alert show];
[alert autorelease];
}
- (void)setTitleWithCurrentPhotoIndex
{
NSString *formatString = NSLocalizedString(@"%1$i of %2$i", @"Picture X out of Y total.");
NSString *title = [NSString stringWithFormat:formatString, currentIndex_ + 1, photoCount_, nil];
[self setTitle:title];
}
- (void)scrollToIndex:(NSInteger)index
{
CGRect frame = scrollView_.frame;
frame.origin.x = frame.size.width * index;
frame.origin.y = 0;
[scrollView_ scrollRectToVisible:frame animated:NO];
}
- (void)setScrollViewContentSize
{
NSInteger pageCount = photoCount_;
if (pageCount == 0) {
pageCount = 1;
}
CGSize size = CGSizeMake(scrollView_.frame.size.width * pageCount,
scrollView_.frame.size.height / 2); // Cut in half to prevent horizontal scrolling.
[scrollView_ setContentSize:size];
}
- (void)viewDidLoad
{
[super viewDidLoad];
photoCount_ = [dataSource_ numberOfPhotos];
[self setScrollViewContentSize];
// Setup our photo view cache. We only keep 3 views in
// memory. NSNull is used as a placeholder for the other
// elements in the view cache array.
photoViews_ = [[NSMutableArray alloc] initWithCapacity:photoCount_];
for (int i=0; i < photoCount_; i++) {
[photoViews_ addObject:[NSNull null]];
}
}
- (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.
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// The first time the view appears, store away the previous controller's values so we can reset on pop.
UINavigationBar *navbar = [[self navigationController] navigationBar];
if (!viewDidAppearOnce_) {
viewDidAppearOnce_ = YES;
navbarWasTranslucent_ = [navbar isTranslucent];
statusBarStyle_ = [[UIApplication sharedApplication] statusBarStyle];
}
// Then ensure translucency. Without it, the view will appear below rather than under it.
[navbar setTranslucent:YES];
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent animated:YES];
// Set the scroll view's content size, auto-scroll to the stating photo,
// and setup the other display elements.
[self setScrollViewContentSize];
[self setCurrentIndex:startWithIndex_];
[self scrollToIndex:startWithIndex_];
[self setTitleWithCurrentPhotoIndex];
[self toggleNavButtons];
[self startChromeDisplayTimer];
}
- (void)viewWillDisappear:(BOOL)animated
{
// Reset nav bar translucency and status bar style to whatever it was before.
UINavigationBar *navbar = [[self navigationController] navigationBar];
[navbar setTranslucent:navbarWasTranslucent_];
[[UIApplication sharedApplication] setStatusBarStyle:statusBarStyle_ animated:YES];
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[self cancelChromeDisplayTimer];
[super viewDidDisappear:animated];
}
- (void)deleteCurrentPhoto
{
if (dataSource_) {
// TODO: Animate the deletion of the current photo.
NSInteger photoIndexToDelete = currentIndex_;
[self unloadPhoto:photoIndexToDelete];
[dataSource_ deleteImageAtIndex:photoIndexToDelete];
photoCount_ -= 1;
if (photoCount_ == 0) {
[self showChrome];
[[self navigationController] popViewControllerAnimated:YES];
} else {
NSInteger nextIndex = photoIndexToDelete;
if (nextIndex == photoCount_) {
nextIndex -= 1;
}
[self setCurrentIndex:nextIndex];
[self setScrollViewContentSize];
}
}
}
- (void)toggleNavButtons
{
[previousButton_ setEnabled:(currentIndex_ > 0)];
[nextButton_ setEnabled:(currentIndex_ < photoCount_ - 1)];
}
#pragma mark -
#pragma mark Frame calculations
#define PADDING 20
- (CGRect)frameForPagingScrollView
{
CGRect frame = [[UIScreen mainScreen] bounds];
frame.origin.x -= PADDING;
frame.size.width += (2 * PADDING);
return frame;
}
- (CGRect)frameForPageAtIndex:(NSUInteger)index
{
CGRect bounds = [scrollView_ bounds];
CGRect pageFrame = bounds;
pageFrame.size.width -= (2 * PADDING);
pageFrame.origin.x = (bounds.size.width * index) + PADDING;
return pageFrame;
}
#pragma mark -
#pragma mark Photo (Page) Management
- (void)loadPhoto:(NSInteger)index
{
if (index < 0 || index >= photoCount_) {
return;
}
id currentPhotoView = [photoViews_ objectAtIndex:index];
if (NO == [currentPhotoView isKindOfClass:[KTPhotoView class]]) {
// Load the photo view.
CGRect frame = [self frameForPageAtIndex:index];
KTPhotoView *photoView = [[KTPhotoView alloc] initWithFrame:frame];
[photoView setScroller:self];
[photoView setIndex:index];
[photoView setBackgroundColor:[UIColor clearColor]];
// Set the photo image.
if (dataSource_) {
if ([dataSource_ respondsToSelector:@selector(imageAtIndex:photoView:)] == NO) {
UIImage *image = [dataSource_ imageAtIndex:index];
[photoView setImage:image];
} else {
[dataSource_ imageAtIndex:index photoView:photoView];
}
}
[scrollView_ addSubview:photoView];
[photoViews_ replaceObjectAtIndex:index withObject:photoView];
[photoView release];
} else {
// Turn off zooming.
[currentPhotoView turnOffZoom];
}
}
- (void)unloadPhoto:(NSInteger)index
{
if (index < 0 || index >= photoCount_) {
return;
}
id currentPhotoView = [photoViews_ objectAtIndex:index];
if ([currentPhotoView isKindOfClass:[KTPhotoView class]]) {
[currentPhotoView removeFromSuperview];
[photoViews_ replaceObjectAtIndex:index withObject:[NSNull null]];
}
}
- (void)setCurrentIndex:(NSInteger)newIndex
{
currentIndex_ = newIndex;
if(newIndex>=0){
myUrl = [dataSource_ imageURLAtIndex:currentIndex_ photoView:[photoViews_ objectAtIndex:currentIndex_]];
myDescr = [dataSource_ imageDESCRAtIndex:currentIndex_ photoView:[photoViews_ objectAtIndex:currentIndex_]];
img_Title =[dataSource_ imageimg_TitleAtIndex:currentIndex_ photoView:[photoViews_ objectAtIndex:currentIndex_]];
}
[self loadPhoto:currentIndex_];
[self loadPhoto:currentIndex_ + 1];
[self loadPhoto:currentIndex_ - 1];
[self unloadPhoto:currentIndex_ + 2];
[self unloadPhoto:currentIndex_ - 2];
[self setTitleWithCurrentPhotoIndex];
[self toggleNavButtons];
}
#pragma mark -
#pragma mark Rotation Magic
- (void)updateToolbarWithOrientation:(UIInterfaceOrientation)interfaceOrientation
{
CGRect toolbarFrame = toolbar_.frame;
if ((interfaceOrientation) == UIInterfaceOrientationPortrait || (interfaceOrientation) == UIInterfaceOrientationPortraitUpsideDown) {
toolbarFrame.size.height = ktkDefaultPortraitToolbarHeight;
} else {
toolbarFrame.size.height = ktkDefaultLandscapeToolbarHeight+1;
}
toolbarFrame.size.width = self.view.frame.size.width;
toolbarFrame.origin.y = self.view.frame.size.height - toolbarFrame.size.height;
toolbar_.frame = toolbarFrame;
}
- (void)layoutScrollViewSubviews
{
[self setScrollViewContentSize];
NSArray *subviews = [scrollView_ subviews];
for (KTPhotoView *photoView in subviews) {
CGPoint restorePoint = [photoView pointToCenterAfterRotation];
CGFloat restoreScale = [photoView scaleToRestoreAfterRotation];
[photoView setFrame:[self frameForPageAtIndex:[photoView index]]];
[photoView setMaxMinZoomScalesForCurrentBounds];
[photoView restoreCenterPoint:restorePoint scale:restoreScale];
}
// adjust contentOffset to preserve page location based on values collected prior to location
CGFloat pageWidth = scrollView_.bounds.size.width;
CGFloat newOffset = (firstVisiblePageIndexBeforeRotation_ * pageWidth) + (percentScrolledIntoFirstVisiblePage_ * pageWidth);
scrollView_.contentOffset = CGPointMake(newOffset, 0);
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
duration:(NSTimeInterval)duration
{
// here, our pagingScrollView bounds have not yet been updated for the new interface orientation. So this is a good
// place to calculate the content offset that we will need in the new orientation
CGFloat offset = scrollView_.contentOffset.x;
CGFloat pageWidth = scrollView_.bounds.size.width;
if (offset >= 0) {
firstVisiblePageIndexBeforeRotation_ = floorf(offset / pageWidth);
percentScrolledIntoFirstVisiblePage_ = (offset - (firstVisiblePageIndexBeforeRotation_ * pageWidth)) / pageWidth;
} else {
firstVisiblePageIndexBeforeRotation_ = 0;
percentScrolledIntoFirstVisiblePage_ = offset / pageWidth;
}
}
- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
duration:(NSTimeInterval)duration
{
[self layoutScrollViewSubviews];
// Rotate the toolbar.
[self updateToolbarWithOrientation:toInterfaceOrientation];
// Adjust navigation bar if needed.
if (isChromeHidden_ && statusbarHidden_ == NO) {
UINavigationBar *navbar = [[self navigationController] navigationBar];
CGRect frame = [navbar frame];
frame.origin.y = 20;
[navbar setFrame:frame];
}
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
[self startChromeDisplayTimer];
}
- (UIView *)rotatingFooterView
{
return toolbar_;
}
#pragma mark -
#pragma mark Chrome Helpers
- (void)toggleChromeDisplay
{
[self toggleChrome:!isChromeHidden_];
}
- (void)toggleChrome:(BOOL)hide
{
isChromeHidden_ = hide;
if (hide) {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.4];
}
if ( ! [self isStatusbarHidden] ) {
if ([[UIApplication sharedApplication] respondsToSelector:@selector(setStatusBarHidden:withAnimation:)]) {
[[UIApplication sharedApplication] setStatusBarHidden:hide withAnimation:NO];
} else { // Deprecated in iOS 3.2+.
id sharedApp = [UIApplication sharedApplication]; // Get around deprecation warnings.
[sharedApp setStatusBarHidden:hide animated:NO];
}
}
CGFloat alpha = hide ? 0.0 : 1.0;
// Must set the navigation bar's alpha, otherwise the photo
// view will be pushed until the navigation bar.
UINavigationBar *navbar = [[self navigationController] navigationBar];
[navbar setAlpha:alpha];
[toolbar_ setAlpha:alpha];
if (hide) {
[UIView commitAnimations];
}
if ( ! isChromeHidden_ ) {
[self startChromeDisplayTimer];
}
}
- (void)hideChrome
{
if (chromeHideTimer_ && [chromeHideTimer_ isValid]) {
[chromeHideTimer_ invalidate];
chromeHideTimer_ = nil;
}
[self toggleChrome:YES];
}
- (void)showChrome
{
[self toggleChrome:NO];
}
- (void)startChromeDisplayTimer
{
[self cancelChromeDisplayTimer];
chromeHideTimer_ = [NSTimer scheduledTimerWithTimeInterval:5.0
target:self
selector:@selector(hideChrome)
userInfo:nil
repeats:NO];
}
- (void)cancelChromeDisplayTimer
{
if (chromeHideTimer_) {
[chromeHideTimer_ invalidate];
chromeHideTimer_ = nil;
}
}
#pragma mark -
#pragma mark UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGFloat pageWidth = scrollView.frame.size.width;
float fractionalPage = scrollView.contentOffset.x / pageWidth;
NSInteger page = floor(fractionalPage);
if (page != currentIndex_) {
[self setCurrentIndex:page];
}
}
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
[self hideChrome];
}
#pragma mark -
#pragma mark Toolbar Actions
- (void)nextPhoto
{
[self scrollToIndex:currentIndex_ + 1];
[self startChromeDisplayTimer];
}
- (void)previousPhoto
{
[self scrollToIndex:currentIndex_ - 1];
[self startChromeDisplayTimer];
}
- (void)msgPhoto
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:img_Title message:myDescr delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
- (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
NSString *message;
NSString *title;
if (!error) {
title = @"Done";
message = @"image copied to your local gallery";
} else {
title = @"Error";
message = [error description];
}
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:message delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0) {
//save to gallery
UIImage *imageB = [UIImage imageWithData: [NSData dataWithContentsOfURL: [NSURL URLWithString: myUrl]]];
UIImageWriteToSavedPhotosAlbum(imageB, self, @selector(imageSavedToPhotosAlbum: didFinishSavingWithError: contextInfo:), nil);
} else if (buttonIndex == 1) {
//email
MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc] init];
mailComposer.mailComposeDelegate = self;
mailComposer.toolbar.barStyle = UIBarStyleBlack;
mailComposer.title = @"Your title here";
[[mailComposer navigationBar] setTintColor:[UIColor colorWithRed:124.0/255 green:17.0/255 blue:92.0/255 alpha:1]];
if ([MFMailComposeViewController canSendMail]) {
[mailComposer setSubject:@"Look at a great image"];
[mailComposer setMessageBody:[NSString stringWithFormat:@"%@",myUrl] isHTML:NO];
UIImage *imageB = [UIImage imageWithData: [NSData dataWithContentsOfURL: [NSURL URLWithString: myUrl]]];
NSData *exportData = UIImageJPEGRepresentation(imageB ,1.0);
[mailComposer addAttachmentData:exportData mimeType:@"image/jpeg" fileName:img_Title];
[self presentModalViewController:mailComposer animated:YES];
}
//release the mailComposer as it is now being managed as the UIViewControllers modalViewController.
[mailComposer release];
} else if (buttonIndex == 2) {
//cancel
}
[self startChromeDisplayTimer];
}
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
[self dismissModalViewControllerAnimated:YES];
if (result == MFMailComposeResultFailed) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Failed to send message" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
- (void) exportPhoto
{
if ([dataSource_ respondsToSelector:@selector(exportImageAtIndex:)])
[dataSource_ exportImageAtIndex:currentIndex_];
[self startChromeDisplayTimer];
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Actions"
delegate:self
cancelButtonTitle:@"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:@"Save to gallery", @"Email",nil];
[actionSheet showInView:[self view]];
[actionSheet release];
}
@end