首页 > 代码库 > iOS开发UI篇—手势识别器（长按+轻扫）
iOS开发UI篇—手势识别器（长按+轻扫）
iOS开发UI篇—手势识别器（长按+轻扫）
一、长按事件
1 // 2 // YYViewController.m 3 // 03-长按 4 // 5 // Created by apple on 14-6-19. 6 // Copyright (c) 2014年 itcase. All rights reserved. 7 // 8 9 #import "YYViewController.h"10 11 @interface YYViewController ()12 @property (weak, nonatomic) IBOutlet UIView *iconView;13 14 @end15 16 @implementation YYViewController17 18 - (void)viewDidLoad19 {20 [super viewDidLoad];21 22 //长按事件23 //1.创建一个手势识别器对象24 UILongPressGestureRecognizer *longpress=[[UILongPressGestureRecognizer alloc]init];25 26 //2.设置长按手势识别器的属性27 //设置最小停留时间28 // longpress.minimumPressDuration=3;29 //手指按下后事件响应前允许手指移动的偏移量30 longpress.allowableMovement=50;31 32 //3.添加手势识别器到view33 [self.iconView addGestureRecognizer:longpress];34 35 //4.监听手势识别器36 [longpress addTarget:self action:@selector(longpressView)];37 }38 39 -(void)longpressView40 {41 NSLog(@"发生了长按事件");42 }43 44 @end
步骤
（1）创建手势识别器
（2）添加手势识别器
（3）监听
二、轻扫事件
1 // 2 // YYViewController.m 3 // 04-轻扫 4 // 5 // Created by apple on 14-6-19. 6 // Copyright (c) 2014年 itcase. All rights reserved. 7 // 8 9 #import "YYViewController.h"10 11 @interface YYViewController ()12 @property (weak, nonatomic) IBOutlet UIView *iconView;13 14 @end15 16 @implementation YYViewController17 18 - (void)viewDidLoad19 {20 [super viewDidLoad];21 22 //1.创建手势识别器（轻扫事件）23 UISwipeGestureRecognizer *swipe=[[UISwipeGestureRecognizer alloc]init];24 25 //2.设置手势识别器的属性26 //默认为向右27 //设置手指向右轻扫的时候触发28 // swipe.direction=UISwipeGestureRecognizerDirectionUp;29 //设置向下和向上两个方向轻扫30 swipe.direction=UISwipeGestureRecognizerDirectionDown|UISwipeGestureRecognizerDirectionUp;31 32 33 //3.添加手势识别器34 [self.iconView addGestureRecognizer:swipe];35 36 //4.监听手势37 [swipe addTarget:self action:@selector(swipeView)];38 }39 40 -(void)swipeView41 {42 NSLog(@"手指在屏幕上轻扫");43 }44 45 @end
提示：swipe.direction=UISwipeGestureRecognizerDirectionDown|UISwipeGestureRecognizerDirectionUp;这种方式最多只支持个方向的清扫。
设置支持四个方向的轻扫事件，代码如下：
1 // 2 // YYViewController.m 3 // 05-轻扫2 4 // 5 // Created by apple on 14-6-19. 6 // Copyright (c) 2014年 itcase. All rights reserved. 7 // 8 9 #import "YYViewController.h"10 11 @interface YYViewController ()12 @property (strong, nonatomic) IBOutlet UIView *iconView;13 14 @end15 16 @implementation YYViewController17 18 - (void)viewDidLoad19 {20 [super viewDidLoad];21 22 //设置四个方向的轻扫23 //向左24 UISwipeGestureRecognizer *swipeleft=[[UISwipeGestureRecognizer alloc]init];25 //设置轻扫的方向26 swipeleft.direction=UISwipeGestureRecognizerDirectionLeft;27 [self.iconView addGestureRecognizer:swipeleft];28 [swipeleft addTarget:self action:@selector(swipeleftView)];29 30 //向右31 UISwipeGestureRecognizer *swiperight=[[UISwipeGestureRecognizer alloc]init];32 //设置轻扫的方向33 swiperight.direction=UISwipeGestureRecognizerDirectionRight;34 [self.iconView addGestureRecognizer:swiperight];35 [swiperight addTarget:self action:@selector(swiperightView)];36 37 //向下38 UISwipeGestureRecognizer *swipedown=[[UISwipeGestureRecognizer alloc]init];39 //设置轻扫的方向40 swipedown.direction=UISwipeGestureRecognizerDirectionDown;41 [self.iconView addGestureRecognizer:swipedown];42 [swipedown addTarget:self action:@selector(swipedownView)];43 44 //向上45 UISwipeGestureRecognizer *swipeup=[[UISwipeGestureRecognizer alloc]init];46 //设置轻扫的方向47 swipeup.direction=UISwipeGestureRecognizerDirectionUp;48 [self.iconView addGestureRecognizer:swipeup];49 [swipeup addTarget:self action:@selector(swipeupView)];50 51 //简略写法52 [ self.iconView addGestureRecognizer: [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(abc)] ];53 54 }55 56 -(void)abc57 {58 }59 -(void)swipeleftView60 {61 NSLog(@"手指向左轻扫");62 }63 64 -(void)swiperightView65 {66 NSLog(@"手指向右轻扫");67 }68 -(void)swipedownView69 {70 NSLog(@"手指向下轻扫");71 }72 -(void)swipeupView73 {74 NSLog(@"手指向上轻扫");75 }76 @end
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。