Cocoa : Who to handle MouveXXX events on UIWebView
Default behavior of the UIWebView is : eat touchXXX events and not send them to the nextResponder. One way to be able to catch this kind of event on a UIWebView is to add on top of it a UIView. But at this point, links, scroll, etc… are not capture to inner components of the under UIWebView. Here is a HACK to make this struff work :
// // TouchUIWebView.h // // Created by Vincent Demay on 19/06/09. // Copyright 2009 __MyCompanyName__. All rights reserved. // #import
// // TouchUIWebView.m // // Created by Vincent Demay on 19/06/09. // Copyright 2009 __MyCompanyName__. All rights reserved. // #import "TouchUIWebView.h" const char* kUIScrollerName = "UIScroller"; const char* kUIWebDocumentView= "UIWebDocumentView"; @implementation DummyTapView @synthesize uiScroller = uiScroller_; @synthesize uiWebDocumentView = uiWebDocumentView_; // // retreive the scroller view in uiwebView // used to compute scrolling in the loaded web page // - (UIView*) uiScroller { if( self.superview !=nil && uiScroller_ == nil ) { NSArray *views = [self.superview subviews]; for( id view in views ) { const char* name = object_getClassName(view); if( !strncmp( name, kUIScrollerName, strlen(name) ) ) { uiScroller_ = view; return uiScroller_; } } } return uiScroller_; } // // retreive the document view in UiWebView // used to compute touch on link etc... // - (UIView*) uiWebDocumentView { if( self.superview != nil && uiWebDocumentView_ == nil ) { NSArray *views = [self.uiScroller subviews]; for( id view in views ) { const char* name = object_getClassName(view); if( !strncmp( name, kUIWebDocumentView, strlen(name) ) ) { uiWebDocumentView_ = view; return uiWebDocumentView_; } } } return uiWebDocumentView_; } - (id) initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; self.backgroundColor = [UIColor clearColor]; return self; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [self.uiScroller touchesBegan:touches withEvent:event]; [self.uiWebDocumentView touchesBegan:touches withEvent:event]; [self.nextResponder touchesBegan:touches withEvent:event]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [self.uiScroller touchesMoved:touches withEvent:event]; [self.uiWebDocumentView touchesMoved:touches withEvent:event]; [self.nextResponder touchesMoved:touches withEvent:event]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [self.uiScroller touchesEnded:touches withEvent:event]; [self.uiWebDocumentView touchesEnded:touches withEvent:event]; [self.superview didFinishGesturesInView:self.superview forEvent:event]; [self.nextResponder touchesEnded:touches withEvent:event]; } - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { [self.uiScroller touchesCancelled:touches withEvent:event]; [self.uiWebDocumentView touchesCancelled:touches withEvent:event]; [self.nextResponder touchesCancelled:touches withEvent:event]; } @end @implementation TouchUIWebView - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { // Initialization code DummyTapView* view = [[DummyTapView alloc] initWithFrame:CGRectMake( 0,0,self.frame.size.width,self.frame.size.height)]; [self addSubview:view]; [view release]; } return self; } @end
