ios中模拟手势单击或是双击

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最新推荐文章于 2025-04-07 13:20:53 发布

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本文详细介绍了如何通过category拓展UITouch和UIEvent类来处理触摸事件，包括初始化、设置状态和位置的方法，以及触摸开始和结束事件的触发与响应。

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1.拓展UITouch类和UIEvent类（通过category），具体见附件TouchSynthesis.h和TouchSynthesis.m

2.在需要的类中，定义UITouch和UIEvent类的对象。

UITouch *touch = [[UITouchalloc] initWithPoint:point andView:mapview];

UIEvent *eventDown = [[UIEventalloc] initWithTouch:touch];

[touch.view touchesBegan:[eventDownallTouches] withEvent:eventDown];

[touch setPhase:UITouchPhaseEnded];

UIEvent *eventUp = [[UIEventalloc] initWithTouch:touch];

[touch.view touchesEnded:[eventUp allTouches] withEvent:eventUp];

[eventDown release];

[eventUp release];

[touch release];

TouchSynthesis.h文件

#import <UIKit/UIKit.h>

@interface UITouch (Synthesize)

- (id)initInView:(UIView *)view;
-(id) initdoubletap:(UIView *)view;
- (id)initWithPoint:(CGPoint)point andView:(UIView*)view;
- (void)setPhase:(UITouchPhase)phase;
- (void)setLocationInWindow:(CGPoint)location;

@end

@interface UIEvent (Synthesize)

- (id)initWithTouch:(UITouch *)touch;

@end

TouchSynthesis.m文件

#import "TouchSynthesis.h"
#import "MyUITouch.h"

@implementation UITouch (Synthesize)

//
// initInView:phase:
//
// Creats a UITouch, centered on the specified view, in the view's window.
// Sets the phase as specified.
//
- (id)initInView:(UIView *)view
{
    NSLog(@"init in view");
   self = [super init];
   if (self != nil)
   {
       CGRect frameInWindow;
       if ([view isKindOfClass:[UIWindow class]])
       {
           frameInWindow = view.frame;
       }
       else
       {
           frameInWindow =
               [view.window convertRect:view.frame fromView:view.superview];
       }

       _tapCount = 1;
       _locationInWindow =
           CGPointMake(
               frameInWindow.origin.x + 0.5 * frameInWindow.size.width,
               frameInWindow.origin.y + 0.5 * frameInWindow.size.height);
       _previousLocationInWindow = _locationInWindow;

       UIView *target = [view.window hitTest:_locationInWindow withEvent:nil];

       _window = [view.window retain];
       _view = [target retain];
       _phase = UITouchPhaseBegan;
       _touchFlags._firstTouchForView = 1;
       _touchFlags._isTap = 1;
       _timestamp = [NSDate timeIntervalSinceReferenceDate];
   }
   return self;
}
- (id)initdoubletap:(UIView *)view
{
    NSLog(@"init in view");
   self = [super init];
   if (self != nil)
   {
       CGRect frameInWindow;
       if ([view isKindOfClass:[UIWindow class]])
       {
           frameInWindow = view.frame;
       }
       else
       {
           frameInWindow =
            [view.window convertRect:view.frame fromView:view.superview];
       }

       _tapCount = 2;
       _locationInWindow =
        CGPointMake(
                    frameInWindow.origin.x + 0.5 * frameInWindow.size.width,
                    frameInWindow.origin.y + 0.5 * frameInWindow.size.height);
       _previousLocationInWindow = _locationInWindow;

       UIView *target = [view.window hitTest:_locationInWindow withEvent:nil];

       _window = [view.window retain];
       _view = [target retain];
       _phase = UITouchPhaseBegan;
       _touchFlags._firstTouchForView = 1;
       _touchFlags._isTap = 1;
       _timestamp = [NSDate timeIntervalSinceReferenceDate];
   }
   return self;
}

- (id)initWithPoint:(CGPoint)point andView:(UIView*)view
{
    self = [super init];
    if (self != nil)
    {
        CGRect frameInWindow;
        if ([view isKindOfClass:[UIWindow class]])
        {
            frameInWindow = view.frame;
        }
        else
        {
            frameInWindow =
            [view.window convertRect:view.frame fromView:view.superview];
        }

        _tapCount = 1;
        _locationInWindow = point;
        _previousLocationInWindow = _locationInWindow;
        UIView *target = [view.window hitTest:_locationInWindow withEvent:nil];
        _view = [target retain];
        _window = [view.window retain];
        _phase = UITouchPhaseBegan;
        _touchFlags._firstTouchForView = 1;
        _touchFlags._isTap = 1;
        _timestamp = [NSDate timeIntervalSinceReferenceDate];
    }
    return self;
}
//
// setPhase:
//
// Setter to allow access to the _phase member.
//
- (void)setPhase:(UITouchPhase)phase
{
   _phase = phase;
   _timestamp = [NSDate timeIntervalSinceReferenceDate];
}

//
// setPhase:
//
// Setter to allow access to the _locationInWindow member.
//
- (void)setLocationInWindow:(CGPoint)location
{
   _previousLocationInWindow = _locationInWindow;
   _locationInWindow = location;
   _timestamp = [NSDate timeIntervalSinceReferenceDate];
}

@end

//
// GSEvent is an undeclared object. We don't need to use it ourselves but some
// Apple APIs (UIScrollView in particular) require the x and y fields to be present.
//
@interface GSEventProxy : NSObject
{
@public
   unsigned int flags;
   unsigned int type;
   unsigned int ignored1;
   float x1;
   float y1;
   float x2;
   float y2;
   unsigned int ignored2[10];
   unsigned int ignored3[7];
   float sizeX;
   float sizeY;
   float x3;
   float y3;
   unsigned int ignored4[3];
}
@end
@implementation GSEventProxy
@end

//
// PublicEvent
//
// A dummy class used to gain access to UIEvent's private member variables.
// If UIEvent changes at all, this will break.
//
@interface PublicEvent : NSObject
{
@public
    GSEventProxy           *_event;
    NSTimeInterval          _timestamp;
    NSMutableSet           *_touches;
    CFMutableDictionaryRef _keyedTouches;
}
@end

@implementation PublicEvent
@end

@interface UIEvent (Creation)

- (id)_initWithEvent:(GSEventProxy *)fp8 touches:(id)fp12;

@end

//
// UIEvent (Synthesize)
//
// A category to allow creation of a touch event.
//
@implementation UIEvent (Synthesize)

- (id)initWithTouch:(UITouch *)touch
{
   CGPoint location = [touch locationInView:touch.window];
   GSEventProxy *gsEventProxy = [[GSEventProxy alloc] init];
   gsEventProxy->x1 = location.x;
   gsEventProxy->y1 = location.y;
   gsEventProxy->x2 = location.x;
   gsEventProxy->y2 = location.y;
   gsEventProxy->x3 = location.x;
   gsEventProxy->y3 = location.y;
   gsEventProxy->sizeX = 1.0;
   gsEventProxy->sizeY = 1.0;
   gsEventProxy->flags = ([touch phase] == UITouchPhaseEnded) ? 0x1010180 : 0x3010180;
   gsEventProxy->type = 3001;

   //
   // On SDK versions 3.0 and greater, we need to reallocate as a
   // UITouchesEvent.
   //
   Class touchesEventClass = objc_getClass("UITouchesEvent");
   if (touchesEventClass && ![[self class] isEqual:touchesEventClass])
   {
       [self release];
       self = [touchesEventClass alloc];
   }

   self = [self _initWithEvent:gsEventProxy touches:[NSSet setWithObject:touch]];
   if (self != nil)
   {
   }
   return self;
}

@end

MyUITouch.h文件
#import <Foundation/Foundation.h>

#ifdef __IPHONE_6_0
@interface UITouch () {
    NSTimeInterval _timestamp;
    UITouchPhase _phase;
    UITouchPhase _savedPhase;
    NSUInteger _tapCount;

    UIWindow *_window;
    UIView *_view;
    UIView *_gestureView;
    UIView *_warpedIntoView;
    NSMutableArray *_gestureRecognizers;
    NSMutableArray *_forwardingRecord;

    CGPoint _locationInWindow;
    CGPoint _previousLocationInWindow;
    UInt8 _pathIndex;
    UInt8 _pathIdentity;
    float _pathMajorRadius;
    struct {
        unsigned int _firstTouchForView:1;
        unsigned int _isTap:1;
        unsigned int _isDelayed:1;
        unsigned int _sentTouchesEnded:1;
        unsigned int _abandonForwardingRecord:1;
    } _touchFlags;
}
@end
#endif