//
// GestureViewController.m
// LesssonGesture
//
// Created by lanouhn on 15/3/24.
// Copyright (c) 2015年 lanouhn. All rights reserved.
//
#import "GestureViewController.h"
@interface GestureViewController () {
UIImageView *imageView;
BOOL flag;//用于标记当前是哪张图片
NSInteger number;
}
@end
@implementation GestureViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor yellowColor];
imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"哭"]];
//默认值是YES;
flag = YES;
imageView.frame = [UIScreen mainScreen].bounds;
// imageView.frame =
//UIImageView和UILabel一样, 默认的交互是关闭的
imageView.userInteractionEnabled = YES;
imageView.contentMode = UIViewContentModeScaleAspectFill;
[self.view addSubview:imageView];
[imageView release];
//抽象基类的特点: 不能够直接使用, 必须通过子类化的形式才能使用, 换而言之, 只能使用其子类
//UIGestureRecognizer, 手势识别器, 其实是对触摸的封装, 是抽象基类
/*
//点击手势
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:(self) action:@selector(print)];
//点击次数
tap.numberOfTapsRequired = 2;
//需要几个手指,同时点击
tap.numberOfTouchesRequired = 2;
//把手势添加到某个视图上
[imageView addGestureRecognizer:tap];
//释放
[tap release];
//捏合
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
[imageView addGestureRecognizer:pinch];
[pinch release];
//手势集合
//imageView.gestureRecognizers
// for (UIGestureRecognizer *gesture in imageView.gestureRecognizers) {
// [imageView removeGestureRecognizer:gesture];
// }
//旋转
UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];
[imageView addGestureRecognizer:rotation];
[rotation release];
//去掉手势
// [imageView removeGestureRecognizer:tap];
// [imageView removeGestureRecognizer:pinch];
*/
//UISegmentedControl, 分段控制器, 继承于UIControl
//参数: 数组类型, 数组内存放每个分段控制按钮的标题
NSArray *items = @[@"点击", @"捏合", @"旋转", @"清扫", @"平移", @"边缘移动", @"长按"];
UISegmentedControl * segmentedControl = [[UISegmentedControl alloc] initWithItems:items];
segmentedControl.frame = CGRectMake(0, 20, self.view.frame.size.width, 40);
//关联方法
[segmentedControl addTarget:self action:@selector(changeGesture:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:segmentedControl];
[segmentedControl release];
}
- (void)changeGesture:(UISegmentedControl *)aControl {
//选中的时第几个区域
//selectedSegmentIndex, 从0开始
NSLog(@"%ld", aControl.selectedSegmentIndex);
//移除之前的手势
for (UIGestureRecognizer *gesture in imageView.gestureRecognizers) {
[imageView removeGestureRecognizer:gesture];
}
//添加手势
switch (aControl.selectedSegmentIndex) {
case 0://单击
{
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:(self) action:@selector(print)];
//点击次数
tap.numberOfTapsRequired = 1;
//需要几个手指,同时点击
tap.numberOfTouchesRequired = 1;
//把手势添加到某个视图上
[imageView addGestureRecognizer:tap];
//释放
[tap release];
}
break;
case 1://捏合
{
//捏合
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
[imageView addGestureRecognizer:pinch];
[pinch release];
}
break;
case 2://旋转
{
UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];
[imageView addGestureRecognizer:rotation];
[rotation release];
}
break;
case 3://清扫
{
imageView.image = [UIImage imageNamed:@"1"];
//填充模式
imageView.contentMode = UIViewContentModeScaleAspectFit;
//初始值为1
number = 1;
UISwipeGestureRecognizer *rightswipe =[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swape:)];
//设置方向, 只支持一个方向
rightswipe.direction = UISwipeGestureRecognizerDirectionRight;
[imageView addGestureRecognizer:rightswipe];
[rightswipe release];
UISwipeGestureRecognizer *leftswipe =[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swape:)];
//设置方向, 只支持一个方向
leftswipe.direction = UISwipeGestureRecognizerDirectionLeft;
[imageView addGestureRecognizer:leftswipe];
[leftswipe release];
}
break;
case 4://平移
{
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
[imageView addGestureRecognizer:pan];
[pan release];
}
break;
case 5://边缘移动
{
//注意:边缘移动手势触发的机制, 必须保证视图津贴屏幕的边缘
UIScreenEdgePanGestureRecognizer *edgePan = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(edgePan)];
//边缘平移只支持一个方向
edgePan.edges = UIRectEdgeLeft;
[imageView addGestureRecognizer:edgePan];
[edgePan release];
}
break;
case 6://长按
{
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
longPress.minimumPressDuration = 1.0;
[imageView addGestureRecognizer:longPress];
[longPress release];
}
break;
default:
break;
}
}
- (void)longPress:(UILongPressGestureRecognizer *)aLongPress {
NSLog(@"%s", __FUNCTION__);
//手势状态
//aLongPress.state
if (aLongPress.state == UIGestureRecognizerStateBegan) {
NSLog(@"开始");
//屏幕截图
UIGraphicsBeginImageContext([UIScreen mainScreen].bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
}
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
UIAlertView *alView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"图片已保存" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:@"取消", nil];
[alView show];
[alView release];
}
- (void)edgePan {
NSLog(@"%s", __FUNCTION__);
}
- (void)pan:(UIPanGestureRecognizer *)aPan {
//手指移动的位置(x轴和y周的偏移量)
CGPoint point = [aPan translationInView:imageView];
NSLog(@"%@", NSStringFromCGPoint(point));
// CGPoint temp = imageView.center;
// point = temp;
//平移
//参数1:图片原有detransform
//参数2:x轴位移
//参数3:y轴位移
imageView.transform = CGAffineTransformTranslate(imageView.transform, point.x, point.y);
//重置point
[aPan setTranslation:CGPointZero inView:imageView];
}
- (void)swape:(UISwipeGestureRecognizer *)aSwape {
NSLog(@"%s", __FUNCTION__);
if (aSwape.direction == UISwipeGestureRecognizerDirectionLeft) {
number++;
if (number == 15) {
number = 1;
}
}
if (aSwape.direction == UISwipeGestureRecognizerDirectionRight) {
number--;
if (number == 0) {
number = 14;
}
}
NSString *name = [NSString stringWithFormat:@"%ld",number];
imageView.image = [UIImage imageNamed:name];
}
- (void)print {
// //1.
// if (flag) {
// imageView.image = [UIImage imageNamed:@"哭"];
// flag = NO;
// } else {
// imageView.image = [UIImage imageNamed:@"笑"];
// flag = YES;
// }
//2.
imageView.image = flag ? [UIImage imageNamed:@"哭"] :[UIImage imageNamed:@"笑"];
flag = !flag;
}
- (void)rotation:(UIRotationGestureRecognizer *)aRotation {
NSLog(@"%.2lf", aRotation.rotation);
//改变图片旋转角度
//参数1, 改变原先的transform
//参数2, 变化的角度
imageView.transform = CGAffineTransformRotate(imageView.transform, aRotation.rotation);
//重置角度
aRotation.rotation = 0;
}
- (void)pinch:(UIPinchGestureRecognizer *)aPinch {
//缩放比率
NSLog(@"%.2lf", aPinch.scale);
//transfrom是UIView的属性
//图片的变形
//参数1 :原先视图的trandform
//参数2 :x轴改变的比率
//参数3 :y轴改变的比率
imageView.transform = CGAffineTransformScale(imageView.transform, aPinch.scale, aPinch.scale);
//重置比率
aPinch.scale = 1;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
