手势识别器基本练习

Main.storyboard

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="5053" systemVersion="13D65" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" initialViewController="vXZ-lx-hvc">
    <dependencies>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="3733"/>
    </dependencies>
    <scenes>
        <!--View Controller-->
        <scene sceneID="ufC-wZ-h7g">
            <objects>
                <viewController id="vXZ-lx-hvc" customClass="LWTViewController" sceneMemberID="viewController">
                    <view key="view" contentMode="scaleToFill" id="kh9-bI-dsS">
                        <rect key="frame" x="0.0" y="0.0" width="320" height="480"/>
                        <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                        <subviews>
                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="scene" id="i13-3w-YRs">
                                <rect key="frame" x="48" y="149" width="224" height="182"/>
                                <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                            </imageView>
                        </subviews>
                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
                    </view>
                    <connections>
                        <outlet property="imageView" destination="i13-3w-YRs" id="omC-0A-gHm"/>
                    </connections>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="x5A-6p-PRh" sceneMemberID="firstResponder"/>
            </objects>
        </scene>
    </scenes>
    <resources>
        <image name="scene" width="223" height="181"/>
    </resources>
    <simulatedMetricsContainer key="defaultSimulatedMetrics">
        <simulatedStatusBarMetrics key="statusBar"/>
        <simulatedOrientationMetrics key="orientation"/>
        <simulatedScreenMetrics key="destination"/>
    </simulatedMetricsContainer>
</document>

LWTViewController.m

//
//  LWTViewController.m
//  手势识别器 -- UIGestureRecognizer
//
//  Created by apple on 14-6-14.
//  Copyright (c) 2014年 lwt. All rights reserved.
//

#import "LWTViewController.h"

@interface LWTViewController () <UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation LWTViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    self.imageView.userInteractionEnabled = YES;
    self.imageView.multipleTouchEnabled = YES;
    
    // 拖拽
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panView:)];
    
    [self.imageView addGestureRecognizer:pan];
//    [self pinch];
//    
//    [self rotation];
}

- (void)panView: (UIPanGestureRecognizer *)pan
{
    // NSLog(@"%@",pan);
    // 返回的值是以手指按下的点为原点
    CGPoint point = [pan translationInView:pan.view];
    
    // NSLog(@"拖拽 %@", NSStringFromCGPoint(point));

    self.imageView.transform = CGAffineTransformTranslate(self.imageView.transform, point.x, point.y);
//    CGPoint temp = self.imageView.center;
//    temp.x += point.x;
//    temp.y += point.y;
//    self.imageView.center = temp;
    
    [pan setTranslation:CGPointZero inView:pan.view];
    
}

// 捏合
- (void)pinch
{
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchView:)];
    pinch.delegate = self;
    
    [self.imageView addGestureRecognizer:pinch];
}

- (void)pinchView : (UIPinchGestureRecognizer *)pinch
{
    // NSLog(@"%@",pinch);
    // self.imageView.transform = CGAffineTransformMakeScale(pinch.scale, pinch.scale);
    
    self.imageView.transform = CGAffineTransformScale(self.imageView.transform, pinch.scale, pinch.scale);
    
    pinch.scale = 1.0;
}

// 旋转
- (void)rotation
{
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationView:)];
    
    rotation.delegate = self;
    
    [self.imageView addGestureRecognizer:rotation];
}

- (void)rotationView: (UIRotationGestureRecognizer *)rotation
{
    // NSLog(@"%@",rotation);
    
    // 每次从最初的位置开始
    // self.iconView.transform = CGAffineTransformMakeRotation(gesture.rotation);
    // 在传入的transform基础上递增一个弧度
    self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, rotation.rotation);
    // 将旋转的弧度清零(注意不是将图片旋转的弧度清零, 而是将当前手指旋转的弧度清零)
    rotation.rotation = 0;
}

// 长按
- (void)longPress
{
    UILongPressGestureRecognizer *longPress =[[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressView:)];
    
    longPress.minimumPressDuration = 2.0;
    // 手指按下后事件响应之前允许手指移动的偏移位
    longPress.allowableMovement = 50;
    
    [self.imageView addGestureRecognizer:longPress];
}

- (void)longPressView : (UILongPressGestureRecognizer *)longPress
{
    NSLog(@"UILongPressGestureRecognizer");
}

// 轻扫
- (void)swipe
{
    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeView:)];
    
    // 不是所有的都能实现
    // swipe.direction = UISwipeGestureRecognizerDirectionUp | UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionDown | UISwipeGestureRecognizerDirectionRight;
    // 设置轻扫的方向
    swipe.direction = UISwipeGestureRecognizerDirectionUp;
    
    [self.imageView addGestureRecognizer:swipe];
    
    UISwipeGestureRecognizer *swipe1 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeView:)];
    swipe1.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.imageView addGestureRecognizer:swipe1];
    
    UISwipeGestureRecognizer *swipe2 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeView:)];
    swipe2.direction = UISwipeGestureRecognizerDirectionDown;
    [self.imageView addGestureRecognizer:swipe2];
    
    UISwipeGestureRecognizer *swipe3 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeView:)];
    swipe3.direction = UISwipeGestureRecognizerDirectionRight;
    [self.imageView addGestureRecognizer:swipe3];
}

- (void)swipeView : (UISwipeGestureRecognizer *)swipe
{
    NSLog(@"UITapGestureRecognizer");
}

// 敲击
- (void)tap
{
    // 创建手势识别器
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] init];
    
    tap.delegate = self;
    
    // tap.numberOfTapsRequired = 2;
    // tap.numberOfTouchesRequired = 2;
    // 添加手势识别器到View
    [self.imageView addGestureRecognizer:tap];
    // 监听手势识别器
    [tap addTarget:self action:@selector(tapView:)];
}

- (void)tapView : (UITapGestureRecognizer *)tap
{
    NSLog(@"UITapGestureRecognizer");
}

#pragma mark - UIGestureRecognizerDelegate
/*
 // 该方法返回的BOOL值决定了view是否响应点击事件
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    CGPoint point = [touch locationInView:touch.view];
    if (point.x < self.imageView.bounds.size.width * 0.5) {
        return YES;
    }else
    {
        return NO;
    }
}
 */

// 该方法返回的BOOL值决定了view是否能够同时响应多个手势
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

@end