//联系人:石虎QQ: 1224614774昵称:嗡嘛呢叭咪哄
/**
注意点: 1.看 GIF 效果图.
2.看连线视图的效果图.
3.看实现代码(直接复制实现效果).
*/
一、GIF 效果图:
二、连线视图的效果图:
图1:
三、实现代码:
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控制器1:
// ViewController.m
//手势dome
//
// Created by石虎on 2017/7/26.
// Copyright © 2017年shihu. All rights reserved.
//
#import"ViewController.h"
@interfaceViewController()
@property(weak,nonatomic)IBOutletUIImageView*imageView;
@property(nonatomic)CGFloatlastRotation;//最后一次旋转
@end
/**
UIGestureRecognize的子类类别有以下几种：
UITapGestureRecognizer //轻拍识别器
UIPinchGestureRecognizer //捏合识别器
UIRotationGestureRecognizer //旋转识别器
UISwipeGestureRecognizer //扫动识别器
UIPanGestureRecognizer //拖动识别器
UILongPressGestureRecognizer //长按识别器
下面的例子我是用UIPinchGestureRecognizer和UIRotationGestureRecognizer通过手势实现图片旋转和缩小放大。
*/
@implementationViewController
- (void)viewDidLoad {
[superviewDidLoad];
//添加捏合手势识别器，changeImageSize:方法实现图片的放大与缩小
UIPinchGestureRecognizer*pinchRecognizer = [[UIPinchGestureRecognizeralloc]initWithTarget:selfaction:@selector(changeImageSize:)];
[self.viewaddGestureRecognizer:pinchRecognizer];
//添加旋转手势识别器，rotateImage:方法实现图片的旋转
UIRotationGestureRecognizer*rotateRecognizer = [[UIRotationGestureRecognizeralloc]initWithTarget:selfaction:@selector(rotateImage:)];
[self.viewaddGestureRecognizer:rotateRecognizer];
}
#pragma mark --捏合手势识别器
-(void)changeImageSize:(UIPinchGestureRecognizer*)recognizer
{
CGRectframe =self.imageView.frame;
//监听两手指滑动的距离，改变imageView的frame
frame.size.width= recognizer.scale*128;
frame.size.height= recognizer.scale*128;
self.imageView.frame= frame;
//保证imageView中心不动
self.imageView.center=CGPointMake(self.view.frame.size.width/2,self.view.frame.size.height/2);
}
#pragma mark -旋转手势识别器监听
-(void)rotateImage:(UIRotationGestureRecognizer*)rotateRecognizer
{
//改变imageView的角度，使图片旋转
if([rotateRecognizerstate]==UIGestureRecognizerStateEnded) {
self.lastRotation=0.0;
return;
}
CGAffineTransformcurrentTransform =self.imageView.transform;
CGFloatrotation =0.0- (self.lastRotation- rotateRecognizer.rotation);
//拿到当前的位置和尺寸
CGAffineTransformnewTransform =CGAffineTransformRotate(currentTransform,rotation);
self.imageView.transform= newTransform;
//显示最后一次的位置
self.lastRotation= rotateRecognizer.rotation;
}
@end
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谢谢!!!
