83.手势过滤和手势屏蔽

来源：互联网发布：大学生智慧树网络课程编辑：程序博客网时间：2024/04/30 03:35

如何屏蔽指定区域利用 tap 手势, 利用 tap 手势, 在其代理方法中进行区域限制, 然后根据需要返回 YES / NO

#import "ViewController.h"@interface ViewController ()<UIGestureRecognizerDelegate>@property (weak, nonatomic) IBOutlet UIView *bottomView;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapEvent)];    tap.delegate = self;    [_bottomView addGestureRecognizer:tap];}- (void)tapEvent{    NSLog(@"点击了我");}//屏蔽某些位置点击是否可用-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{    if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {       CGPoint position = [touch locationInView:_bottomView];        //屏蔽手势        if (position.x < 150) {            return NO;        }    }    return YES;}

另外在公开 API 中 , GestureRecognizer总共6个代理方法, 如下:

-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{    return YES;}-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{    return YES;}-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceivePress:(UIPress *)press{    return YES;}-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{    return YES;}-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{    return NO;}-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{    return YES;}

最后附上私有 API 中的两个代理方法, 有兴趣的可以看一看, 审核是否会被拒, 这个本人没有试验过, 不可得知:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer canBePreventedByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer { BOOL result = YES;// something you do return result; } - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer canPreventGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer  { BOOL result = YES;// something you do return result; }

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