(素材源码)猫猫学IOS（三十六）UI之手势事件旋转_缩放_拖拽

效果

代码：NYViewController.m

//
//  NYViewController.m
//  旋转_缩放_拖拽
//
//  Created by apple on 15-5-7.
//  Copyright (c) 2015年 znycat. All rights reserved.
//

#import "NYViewController.h"

#import "NYViewController.h"

@interface NYViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *iconView;

@end

@implementation NYViewController

- (void)viewDidLoad
{
[super viewDidLoad];

//捏合
[self pichTest];
//旋转
[self rotationTest];
//拖拽
[self panTest];
}

//拖拽
-(void)panTest
{
UIPanGestureRecognizer  *pan = [[UIPanGestureRecognizer alloc] init];
[self.iconView addGestureRecognizer:pan];

[pan addTarget:self action:@selector(panView:)];
}

- (void)panView:(UIPanGestureRecognizer *)pan
{
// 返回的值是以手指按下的点为原点
// 1 2 3 4 5
CGPoint point = [pan translationInView:pan.view];

NSLog(@"拖拽事件 %@", NSStringFromCGPoint(point));
CGPoint temp = self.iconView.center;

temp.x += point.x;
temp.y += point.y;
self.iconView.center = temp;

// 理解不了就记住就OK
[pan setTranslation:CGPointZero inView:pan.view];
}

// 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
{
NSLog(@"%@ - %@", gestureRecognizer.class, otherGestureRecognizer.class);
return YES;
}

- (void)pichTest
{
// 捏合手势
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] init];
pinch.delegate = self;

[self.iconView addGestureRecognizer:pinch];
[pinch addTarget:self action:@selector(pinchView:)];
}

- (void)pinchView:(UIPinchGestureRecognizer *)pinch
{
//    NSLog(@"捏合事件 %.1f", pinch.scale);
//    self.iconView.transform = CGAffineTransformMakeScale(pinch.scale, pinch.scale);
// 1.0 * 0.9
self.iconView.transform = CGAffineTransformScale(self.iconView.transform, pinch.scale, pinch.scale);

pinch.scale = 1.0;
}

- (void)rotationTest
{
// 旋转
UIRotationGestureRecognizer *gesture = [[UIRotationGestureRecognizer alloc] init];
gesture.delegate = self;

[self.iconView addGestureRecognizer:gesture];
[gesture addTarget:self action:@selector(rotationView:)];
}

- (void)rotationView:(UIRotationGestureRecognizer *)gesture
{
//    NSLog(@"旋转事件 %.1f", gesture.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.iconView.transform = CGAffineTransformRotate(self.iconView.transform, gesture.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)
gesture.rotation = 0;// 如果理解不了 , 记住就OK
}

@end