die TTPhotoView Gelöst Subklassen (TapDetectingPhotoView) und dann das Hinzufügen alle meine Subviews zu dieser Unterklasse. Das Hauptproblem wurde durch die Fotoumschaltung dargestellt, weil der TTPhotoViewController (insbesondere seine innere TTScrollView) das TTPhotoView während des Switching-Vorgangs wieder verwendet. Wenn Sie beispielsweise Ihre Unteransicht zu Ihrer TTPhotoView-Unterklasse hinzufügen und versuchen, zum nächsten Foto zu wechseln, wird Ihre Unteransicht wahrscheinlich hier sein, weil TTPhotoView erneut verwendet wird. Um dieses Problem zu lösen, habe ich beschlossen, alle meine Unteransichten jedes Mal hinzuzufügen und zu entfernen, wenn ein Fotowechsel stattfindet (siehe TTPhotoViewController :: didMoveToPhoto). Auf diese Weise bin ich sicher, dass jede Fotoansicht ihre Unteransichten hat.
Hier meine Implementierung (nur bemerkenswerte Methoden) Hoffen, dass diese Hilfe!
PhotoViewController.h:
#import "TapDetectingPhotoView.h"
@interface PhotoGalleryController : TTPhotoViewController <TTScrollViewDelegate, TapDetectingPhotoViewDelegate> {
NSArray *images;
}
@property (nonatomic, retain) NSArray *images;
@end
PhotoViewController.m:
#import "PhotoGalleryController.h"
@implementation PhotoGalleryController
@synthesize images;
- (void)viewDidLoad { // fill self.images = ... }
- (TTPhotoView*)createPhotoView {
TapDetectingPhotoView *photoView = [[TapDetectingPhotoView alloc] init];
photoView.tappableAreaDelegate = self;
return [photoView autorelease];
}
#pragma mark -
#pragma mark TTPhotoViewController
- (void)didMoveToPhoto:(id<TTPhoto>)photo fromPhoto:(id<TTPhoto>)fromPhoto {
[super didMoveToPhoto:photo fromPhoto:fromPhoto];
TapDetectingPhotoView *previousPhotoView = (TapDetectingPhotoView *)[_scrollView pageAtIndex:fromPhoto.index];
TapDetectingPhotoView *currentPhotoView = (TapDetectingPhotoView *)[_scrollView pageAtIndex:photo.index];
// destroy the sensible areas from the previous photoview, because the photo could be reused by the TTPhotoViewController!
if (previousPhotoView)
previousPhotoView.sensibleAreas = nil;
// if sensible areas has not been already created, create new
if (currentPhotoView && currentPhotoView.sensibleAreas == nil) {
currentPhotoView.sensibleAreas = [[self.images objectAtIndex:photo.index] valueForKey:@"aMap"];
[self showSensibleAreas:YES animated:YES];
}
}
#pragma mark -
#pragma mark TappablePhotoViewDelegate
// show a detail view when a sensible area is tapped
- (void)tapDidOccurOnSensibleAreaWithId:(NSUInteger)ids {
NSLog(@"SENSIBLE AREA TAPPED ids:%d", ids);
// ..push new view controller...
}
TapDetectingPhotoView.h:
#import "SensibleAreaView.h"
@protocol TapDetectingPhotoViewDelegate;
@interface TapDetectingPhotoView : TTPhotoView <SensibleAreaViewDelegate> {
NSArray *sensibleAreas;
id <TapDetectingPhotoViewDelegate> tappableAreaDelegate;
}
@property (nonatomic, retain) NSArray *sensibleAreas;
@property (nonatomic, assign) id <TapDetectingPhotoViewDelegate> tappableAreaDelegate;
@end
@protocol TapDetectingPhotoViewDelegate <NSObject>
@required
- (void)tapDidOccurOnSensibleAreaWithId:(NSUInteger)ids;
@end
TapDetectingPhotoView.m:
#import "TapDetectingPhotoView.h"
@interface TapDetectingPhotoView (Private)
- (void)createSensibleAreas;
@end
@implementation TapDetectingPhotoView
@synthesize sensibleAreas, tappableAreaDelegate;
- (id)init {
return [self initWithSensibleAreas:nil];
}
- (id)initWithFrame:(CGRect)frame {
return [self initWithSensibleAreas:nil];
}
// designated initializer
- (id)initWithSensibleAreas:(NSArray *)areasList {
if (self = [super initWithFrame:CGRectZero]) {
self.sensibleAreas = areasList;
[self createSensibleAreas];
}
return self;
}
- (void)setSensibleAreas:(NSArray *)newSensibleAreas {
if (newSensibleAreas != self.sensibleAreas) {
// destroy previous sensible area and ensure that only sensible area's subviews are removed
for (UIView *subview in self.subviews)
if ([subview isMemberOfClass:[SensibleAreaView class]])
[subview removeFromSuperview];
[newSensibleAreas retain];
[sensibleAreas release];
sensibleAreas = newSensibleAreas;
[self createSensibleAreas];
}
}
- (void)createSensibleAreas {
SensibleAreaView *area;
NSNumber *areaID;
for (NSDictionary *sensibleArea in self.sensibleAreas) {
CGFloat x1 = [[sensibleArea objectForKey:@"nX1"] floatValue];
CGFloat y1 = [[sensibleArea objectForKey:@"nY1"] floatValue];
area = [[SensibleAreaView alloc] initWithFrame:
CGRectMake(
x1, y1,
[[sensibleArea objectForKey:@"nX2"] floatValue]-x1, [[sensibleArea objectForKey:@"nY2"] floatValue]-y1
)
];
areaID = [sensibleArea objectForKey:@"sId"];
area.ids = [areaID unsignedIntegerValue]; // sensible area internal ID
area.tag = [areaID integerValue];
area.delegate = self;
[self addSubview:area];
[area release];
}
}
// to make sure that if the zoom factor of the TTScrollView is > than 1.0 the subviews continue to respond to the tap events
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
UIView *result = nil;
for (UIView *child in self.subviews) {
CGPoint convertedPoint = [self convertPoint:point toView:child];
if ([child pointInside:convertedPoint withEvent:event]) {
result = child;
}
}
return result;
}
#pragma mark -
#pragma mark TapDetectingPhotoViewDelegate methods
- (void)tapDidOccur:(SensibleAreaView *)aView {
NSLog(@"tapDidOccur ids:%d tag:%d", aView.ids, aView.tag);
[tappableAreaDelegate tapDidOccurOnSensibleAreaWithId:aView.ids];
}
SensibleAreaView.h:
@protocol SensibleAreaViewDelegate;
@interface SensibleAreaView : UIView {
id <SensibleAreaViewDelegate> delegate;
NSUInteger ids;
UIButton *disclosureButton;
}
@property (nonatomic, assign) id <SensibleAreaViewDelegate> delegate;
@property (nonatomic, assign) NSUInteger ids;
@property (nonatomic, retain) UIButton *disclosureButton;
@end
@protocol SensibleAreaViewDelegate <NSObject>
@required
- (void)tapDidOccur:(SensibleAreaView *)aView;
@end
SensibleAreaView.m:
#import "SensibleAreaView.h"
@implementation SensibleAreaView
@synthesize delegate, ids, disclosureButton;
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
self.userInteractionEnabled = YES;
UIColor *color = [[UIColor alloc] initWithWhite:0.4 alpha:1.0];
self.backgroundColor = color;
[color release];
UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[button addTarget:self action:@selector(buttonTouched) forControlEvents:UIControlEventTouchUpInside];
CGRect buttonFrame = button.frame;
// set the button position over the right edge of the sensible area
buttonFrame.origin.x = frame.size.width - buttonFrame.size.width + 5.0f;
buttonFrame.origin.y = frame.size.height/2 - 10.0f;
button.frame = buttonFrame;
button.autoresizingMask = UIViewAutoresizingFlexibleTopMargin |UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin |UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth |UIViewAutoresizingFlexibleHeight;
self.disclosureButton = button;
[self addSubview:button];
// notification used to make sure that the button is properly scaled together with the photoview. I do not want the button looks bigger if the photoview is zoomed, I want to preserve its default dimensions
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(zoomFactorChanged:) name:@"zoomFactorChanged" object:nil];
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[super touchesBegan:touches withEvent:event];
if ([[touches anyObject] tapCount] == 1)
[delegate tapDidOccur:self];
}
- (void)buttonTouched {
[delegate tapDidOccur:self];
}
- (void)zoomFactorChanged:(NSNotification *)message {
NSDictionary *userInfo = [message userInfo];
CGFloat factor = [[userInfo valueForKey:@"zoomFactor"] floatValue];
BOOL withAnimation = [[userInfo valueForKey:@"useAnimation"] boolValue];
if (withAnimation) {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.18];
}
disclosureButton.transform = CGAffineTransformMake(1/factor, 0.0, 0.0, 1/factor, 0.0, 0.0);
if (withAnimation)
[UIView commitAnimations];
}
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"zoomFactorChanged" object:nil];
[disclosureButton release];
[super dealloc];
}