2、识别器检测
//
// ViewController.m
// Swipes
//
// Created by Jierism on 16/8/4.
// Copyright © 2016年 Jierism. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *label;
@property (nonatomic) CGPoint gestureStartPoint;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//创建两个手势识别器
// 1、水平方向识别器
UISwipeGestureRecognizer *horizontal = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(reportHorizontalSwipe:)];
horizontal.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:horizontal];
// 2、垂直方向识别器
UISwipeGestureRecognizer *vertical = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(reportVerticalSwipe:)];
vertical.direction = UISwipeGestureRecognizerDirectionUp | UISwipeGestureRecognizerDirectionDown;
[self.view addGestureRecognizer:vertical];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)reportHorizontalSwipe:(UIGestureRecognizer *)recognizer
{
self.label.text = @"Horizontal swipe detected";
// 2s后擦除文本
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)),
dispatch_get_main_queue(),
^{
self.label.text = @"";
});
}
- (void)reportVerticalSwipe:(UIGestureRecognizer *)recognizer
{
self.label.text = @"Vertical swipe detected";
// 2s后擦除文本
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)),
dispatch_get_main_queue(),
^{
self.label.text = @"";
});
}
@end
三、实现多指轻扫
//
// ViewController.m
// Swipes
//
// Created by Jierism on 16/8/4.
// Copyright © 2016年 Jierism. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *label;
@property (nonatomic) CGPoint gestureStartPoint;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
for (NSUInteger touchCount = 1; touchCount <= 5; touchCount++) {
//创建两个手势识别器
// 1、水平方向识别器
UISwipeGestureRecognizer *horizontal = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(reportHorizontalSwipe:)];
horizontal.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:horizontal];
// 2、垂直方向识别器
UISwipeGestureRecognizer *vertical = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(reportVerticalSwipe:)];
vertical.direction = UISwipeGestureRecognizerDirectionUp | UISwipeGestureRecognizerDirectionDown;
[self.view addGestureRecognizer:vertical];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSString *)descriptionForTouchCount:(NSUInteger)touchCount
{
switch (touchCount) {
case 1:
return @"Single";
case 2:
return @"Double";
case 3:
return @"Triple";
case 4:
return @"Quadruple";
case 5:
return @"Quintuple";
default:
return @"";
}
}
- (void)reportHorizontalSwipe:(UIGestureRecognizer *)recognizer
{
self.label.text = [NSString stringWithFormat:@"%@ Horizontal swipe detected",[self descriptionForTouchCount:[recognizer numberOfTouches]]];
// 2s后擦除文本
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)),
dispatch_get_main_queue(),
^{
self.label.text = @"";
});
}
- (void)reportVerticalSwipe:(UIGestureRecognizer *)recognizer
{
self.label.text = [NSString stringWithFormat:@"%@ Vertical swipe detected",[self descriptionForTouchCount:[recognizer numberOfTouches]]];
// 2s后擦除文本
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)),
dispatch_get_main_queue(),
^{
self.label.text = @"";
});
}
@end
