9.3.2 GestureRecognier Swipe

//
//  SwipeViewController.m
//  9 GestureGecognizer
//
//  Created by Tracy on 15/5/28.
//  Copyright (c) 2015年 Tracy. All rights reserved.
//

#import "SwipeViewController.h"

@interface SwipeViewController ()
@property (strong, nonatomic) UILabel *labelMessage;//显示消息的标签

@end

@implementation SwipeViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self onCreate];
    [self createGestureRecognizer];
}

#pragma mark 创建界面控件
- (void)onCreate {
    //创建1个标签
    self.labelMessage = [[UILabel alloc]initWithFrame:CGRectMake(10, 64, 200, 30)];
    self.labelMessage.text = @"检测扫动";
    
    //加入视图中
    [self.view addSubview:self.labelMessage];
}
#pragma mark 创建手势识别器
- (void)createGestureRecognizer {
    //横扫手势识别器
    UISwipeGestureRecognizer *leftToRight = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeHandle:)];
    //竖扫手势识别器
    UISwipeGestureRecognizer *topToBottom = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeHandle:)];
    //设置手势识别器属性（扫动方向）
    leftToRight.direction = UISwipeGestureRecognizerDirectionRight|UISwipeGestureRecognizerDirectionLeft;
    topToBottom.direction = UISwipeGestureRecognizerDirectionDown|UISwipeGestureRecognizerDirectionUp;
    //注册手势识别器
    [self.view addGestureRecognizer:leftToRight];
    [self.view addGestureRecognizer:topToBottom];
}
#pragma mark 识别手势方法
- (void)swipeHandle:(UISwipeGestureRecognizer *)recognizer {
    if (recognizer.direction == (UISwipeGestureRecognizerDirectionRight|UISwipeGestureRecognizerDirectionLeft) ) {
        self.labelMessage.text = @"检测到横扫！";
    } else if (recognizer.direction == (UISwipeGestureRecognizerDirectionDown|UISwipeGestureRecognizerDirectionUp)) {
        self.labelMessage.text = @"检测到竖扫！";
    }
}
@end