110 lines
5.2 KiB
Objective-C
110 lines
5.2 KiB
Objective-C
//
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// CustomTapGestureRecognizer.m
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// VoidLink
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//
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// Created by True砖家 on 2024/5/15.
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// Copyright © 2024 True砖家 on Bilibili. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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#import <UIKit/UIGestureRecognizerSubclass.h>
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#import "CustomTapGestureRecognizer.h"
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#import "VoidLink-Swift.h"
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// The most accurate & reliable tap gesture recognizer of iOS:
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// - Almost 100% recoginition rate. UITapGestureRecognizer of Apple API fails frequently, just a piece of crap.
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// - When immediateTriggering is set to false (for native multi-touch):
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// Gesture signal will be triggered on touchesEnded stage, multi finger touch operations will not be interrupted by the arising keyboard.
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// Instances of different [numberOfTouchesRequired] barely compete with each other, for example, the chance of 3-finger gesture get triggered by 4 or 5 finger tap is very small.
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// - Set property immediateTriggering to true, to ensure the priority of keyboard toggle in non-native touch mode, in compete with 2-finger gestures.
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// - This recognizer also provides properties like gestureCapturedTime, to be accessed outside the class for useful purpose.
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@implementation CustomTapGestureRecognizer
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static CGFloat screenHeightInPoints;
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static CGFloat screenWidthInPoints;
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- (instancetype)initWithTarget:(nullable id)target action:(nullable SEL)action {
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self = [super initWithTarget:target action:action];
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screenHeightInPoints = CGRectGetHeight([[UIScreen mainScreen] bounds]);
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screenWidthInPoints = CGRectGetWidth([[UIScreen mainScreen] bounds]);
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lowestTouchPointYCoord = 0.0;
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_numberOfTouchesRequired = 3;
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_immediateTriggering = false;
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_tapDownTimeThreshold = 0.3;
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_gestureCaptured = false;
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_isOnScreenControllerBeingPressed = false;
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return self;
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}
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- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
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// Check if the number of touches and taps meets the required criteria
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NSSet* allTouches = [event allTouches];
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if (allTouches.count == _numberOfTouchesRequired) {
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if([UITouchUtil touchesIn:_touchCapturingView from:event].count != allTouches.count){
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_gestureCaptured = false;
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self.state = UIGestureRecognizerStateFailed;
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return;
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}
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_gestureCapturedTime = CACurrentMediaTime();
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_gestureCaptured = true;
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lowestTouchPointYCoord = 0;
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for(UITouch *touch in allTouches){
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if(lowestTouchPointYCoord < [touch locationInView:self.view].y) lowestTouchPointYCoord = [touch locationInView:self.view].y;
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// NSLog(@"lowest point coord: %f, %f", lowestTouchPointYCoord, CACurrentMediaTime());
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}
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// this mechanism is deprecated.
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/* if(_numberOfTouchesRequired == 2){
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NSArray *twoTouches = [[event allTouches] allObjects];
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_areVirtualControllerTaps = fabs([twoTouches[1] locationInView:self.view].x - [twoTouches[0] locationInView:self.view].x) > screenWidthInPoints/3;
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} */
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_lowestTouchPointHeight = screenHeightInPoints - lowestTouchPointYCoord;
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// NSLog(@"gen _lowestTouchPointHeight %f markmark", _lowestTouchPointHeight);
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if(_immediateTriggering){
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// lowestTouchPointYCoord = 0.0; //reset for next recoginition
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self.state = UIGestureRecognizerStateRecognized;
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return;
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}
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self.state = UIGestureRecognizerStatePossible;
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}
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if (allTouches.count > _numberOfTouchesRequired) {
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_gestureCaptured = false;
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self.state = UIGestureRecognizerStateFailed;
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}
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}
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- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
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// [super touchesEnded:touches withEvent:event];
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if(_immediateTriggering) return;
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uint8_t allTouchesCount = [[event allTouches] count];
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if(allTouchesCount > _numberOfTouchesRequired) {
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_gestureCaptured = false;
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self.state = UIGestureRecognizerStateFailed;
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}
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else if(_gestureCaptured
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&& allTouchesCount == [touches count]
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&& !_isOnScreenControllerBeingPressed){ //must exclude virtual controller & onscreen button taps here to prevent stucked button, _areVirtualControllerTaps flag is set by onscreencontrols, containOnScreenButtonsTaps will be returned by iterating all widget views in streamframeview
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_gestureCaptured = false; //reset for next recognition
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if((CACurrentMediaTime() - _gestureCapturedTime) < _tapDownTimeThreshold){
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// lowestTouchPointYCoord = 0.0; //reset for next recognition
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for(UITouch* touch in touches){
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CGVector vector = [UITouchUtil vectorOf:touch in:self.view];
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if(hypot(vector.dx, vector.dy)>2){
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self.state = UIGestureRecognizerStateFailed;
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break;
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}
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}
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if(self.state != UIGestureRecognizerStateFailed) self.state = UIGestureRecognizerStateRecognized;
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// NSLog(@"gen _lowestTouchPointHeight %f markmark touchesEnd", _lowestTouchPointHeight);
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}
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}
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if (allTouchesCount == [touches count]) _isOnScreenControllerBeingPressed = false; // need to reset this flag anyway, when all fingers are lefting
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}
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@end
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