tapAtPoint on UIWebView subclass - objective-c

Question

I have subclassed UIWebView so that I can get touch events and also implemented this handy method. I'm curious, if this will work on an actual iOS device. I'm not at the office, so I don't know if does. It seems to work in the simulator.
- (void) tapAtPoint:(CGPoint)point
{
id /*UIWebBrowserView*/ webBrowserView = nil;
id webViewInternal = nil;
object_getInstanceVariable(self, "_internal", (void **)&webViewInternal);
object_getInstanceVariable(webViewInternal, "browserView", (void **)&webBrowserView);
if (webBrowserView) {
[webBrowserView tapInteractionWithLocation:point];
}
}
Has anyone tried something like this? I for sure find out in the morning, lol.

Answer 1

Please try this code, Here its working fine.
/* TapDetectingWindow.m */
#import "TapDetectingWindow.h"
#implementation TapDetectingWindow
#synthesize viewToObserve;
#synthesize controllerThatObserves;
- (id)initWithViewToObserver:(UIView *)view andDelegate:(id)delegate {
if(self == [super init]) {
self.viewToObserve = view;
self.controllerThatObserves = delegate;
}
return self;
}
- (void)dealloc {
[viewToObserve release];
[super dealloc];
}
- (void)forwardTap:(id)touch {
[controllerThatObserves userDidTapWebView:touch];
}
- (void)sendEvent:(UIEvent *)event {
[super sendEvent:event];
if (viewToObserve == nil || controllerThatObserves == nil)
return;
NSSet *touches = [event allTouches];
if (touches.count != 1)
return;
UITouch *touch = touches.anyObject;
if (touch.phase != UITouchPhaseEnded)
return;
if ([touch.view isDescendantOfView:viewToObserve] == NO)
return;
CGPoint tapPoint = [touch locationInView:viewToObserve];
NSLog(#"TapPoint = %f, %f", tapPoint.x, tapPoint.y);
NSArray *pointArray = [NSArray arrayWithObjects:[NSString stringWithFormat:#"%f", tapPoint.x],
[NSString stringWithFormat:#"%f", tapPoint.y], nil];
if (touch.tapCount == 1) {
[self performSelector:#selector(forwardTapwithObject:pointArray afterDelay:0.5];
}
else if (touch.tapCount > 1) {
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:#selector(forwardTap  object:pointArray];
}
}
#end
/* WebViewController.h */
#interface WebViewController : UIViewController<TapDetectingWindowDelegate> {
IBOutlet UIWebView *mHtmlViewer;
TapDetectingWindow *mWindow;
}
/* WebViewController.m */
- (void)viewDidLoad {
[super viewDidLoad];
mWindow = (TapDetectingWindow *)[[UIApplication sharedApplication].windows objectAtIndex:0];
mWindow.viewToObserve = mHtmlViewer;
mWindow.controllerThatObserves = self;
}
- (void)userDidTapWebView:(id)tapPoint
{
NSLog(#"TapPoint = %f, %f", tapPoint.x, tapPoint.y);
}
Thanks, Let me know if you face any problems.

Answer 2

short answer: Yes, I tried something like this in the same way and it works on the real devices as well (tested with iOS 6).
ARC version of your method:
- (void) tapAtPoint:(CGPoint)point
{
Ivar internalWebViewIvar = class_getInstanceVariable([self class], "_internal");
id internalWebView = object_getIvar(self, internalWebViewIvar);
Ivar browserViewIvar = class_getInstanceVariable(object_getClass(internalWebView), "browserView");
id browserView = object_getIvar(internalWebView, browserViewIvar);
if (browserView) {
[browserView performSelector:#selector(tapInteractionWithLocation:) withObject:[NSValue valueWithCGPoint:point]];
}
}