好久没有更新我自己的简书了，最近公司项目紧，连续奋斗了三个月，顺利完成。接下来开始我今天的分享。
今天分享的功能点有：
1.在cell中的图片点击放大（+放大动画）。
2.在图片放大后进行缩放功能。
3.通过长按手势进行保存到相册。
4.放大后进行左右上下的移动。
5.点击图片缩小返回cell中。
PS：以上功能全部在tableviewcell中完成。
其实在这里我主要用到了 scrollView、uIimageview、以及几种手势。
- (void)_inteTap{
//自己cell中的图片_ContImage
_ContImage.userInteractionEnabled = YES;
//添加手势进行放大
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapBigTwo)];
[_ContImage addGestureRecognizer:tap];
}
- (void)tapBigTwo{
//弹出来的视图
[self creactSubViewOne];
[UIView animateWithDuration:0.4 animations:^{
CGFloat y,width,height;
y = ([UIScreen mainScreen].bounds.size.height - _ImageView.image.size.height * [UIScreen mainScreen].bounds.size.width / _ImageView.image.size.width) * 0.5;
//宽度为屏幕宽度
width = [UIScreen mainScreen].bounds.size.width;
//高度 根据图片宽高比设置
height = _ImageView.image.size.height * [UIScreen mainScreen].bounds.size.width / _ImageView.image.size.width;
if (height>ScreenHeight) {
[_ImageView setFrame:CGRectMake(0, 0, width, height)];
}else{
[_ImageView setFrame:CGRectMake(0, y, width, height)];
}
//重要！ 将视图显示出来
_scrollView.backgroundColor = [UIColor blackColor];
[_scrollView setAlpha:1];
} completion:^(BOOL finished) {
}];
}
- (void)creactSubViewOne{
_scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, ScreenWidth, ScreenHeight)];
_scrollView.showsHorizontalScrollIndicator = YES;
_scrollView.showsVerticalScrollIndicator = YES;
[self.window addSubview:_scrollView];
_scrollView.scrollEnabled = YES;
_scale = 1.0;
//滑动+放大动画
_ImageOne =_ContImage.image;
CGSize size = _ImageOne.size;
CGFloat height = size.height * [UIScreen mainScreen].bounds.size.width / size.width;
_ImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, ScreenWidth,height)];
_scrollView.contentSize = CGSizeMake(ScreenWidth,height);
_ImageView.image = _ContImage.image;
_ImageView.userInteractionEnabled = YES;
//创建捏合手势进行缩放
UIPinchGestureRecognizer* pinchGR = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchActionOne:)];
// pinchGR.delegate = self; // 可以在同一个视图上实现多个手势
[_ImageView addGestureRecognizer:pinchGR];
//添加手势
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(smallTapOne)];
[_ImageView addGestureRecognizer:tap];
[_scrollView addSubview:_ImageView];
UILongPressGestureRecognizer *longP = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longP:)];
[_ImageView addGestureRecognizer:longP];
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[_ImageView addGestureRecognizer:panRecognizer];
}
//捏合手势的回调方法
- (void)pinchActionOne:(UIPinchGestureRecognizer*)sender{
//放大情况。宏定义：最大缩放比例MaxSCale
if(sender.scale > 1.0){
if (_scale <MaxSCale ) {
_scale = sender.scale+_scale-1;
self.ImageView.transform = CGAffineTransformScale(self.ImageView.transform, sender.scale, sender.scale);
}else{
}
}
//缩小情况 宏定义：最小缩放比例MinScale
if (sender.scale < 1.0) {
if (_scale > MinScale ) {
_scale = sender.scale-1+_scale;
self.ImageView.transform = CGAffineTransformScale(self.ImageView.transform, sender.scale, sender.scale);
}else{
}
}
//修改视图比例
// self.scale *=scale;
CGSize size = _ImageView.frame.size;
_scrollView.contentSize = CGSizeMake(0,size.height);
//清除叠加的数据
sender.scale = 1.0;
}
// 移动
-(void)move:(UIPanGestureRecognizer *)gestureRecognizer {
CGPoint translation = [gestureRecognizer translationInView:[_ImageView superview]];
if ([gestureRecognizer state] == UIGestureRecognizerStateBegan ) {
[_ImageView setCenter:CGPointMake([_ImageView center].x + translation.x, [_ImageView center].y + translation.y)];
[gestureRecognizer setTranslation:CGPointZero inView:[_ImageView superview]];
}else if (gestureRecognizer.state == UIGestureRecognizerStateChanged)
{
_ImageView.center = CGPointMake(_ImageView.center.x + translation.x, _ImageView.center.y);
[gestureRecognizer setTranslation:CGPointMake(0,0) inView:self];
if (_ImageView.center.x > _ImageView.frame.size.width ||
_ImageView.center.x < -_ImageView.frame.size.width
)
{
gestureRecognizer.enabled = NO;
return;
}
}
//
}
//回调cell缩小
- (void)smallTapOne{
[UIView animateWithDuration:0.3 animations:^{
_ImageView.frame = _ContImage.frame;
} completion:^(BOOL finished) {
self.hidden = NO;
[_scrollView removeFromSuperview];
}];
}
//长按手势
-(void)longP:(UILongPressGestureRecognizer *)sender
{
if (sender.state == UIGestureRecognizerStateBegan) {
UIAlertView *WXinstall=[[UIAlertView alloc]initWithTitle:@"提示" message:@"确定保存图片到本地" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
// [[UIView appearance]setTintColor:BlackeColor];
[WXinstall show];
}
}
//监听点击事件 代理方法
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSString *btnTitle = [alertView buttonTitleAtIndex:buttonIndex];
if ([btnTitle isEqualToString:@"取消"]) {
NSLog(@"你点击了取消");
}else if ([btnTitle isEqualToString:@"确定"] ) {
UIImageWriteToSavedPhotosAlbum(_ImageView.image,self,@selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:),NULL); // 写入相册
}//https在iTunes中找，这里的事件是前往手机端App store下载微信
}
// 完善回调
-(void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
if(!error){
NSLog(@"保存成功");
[self LabXian:@"保存成功"];
}else{
NSLog(@"保存失败");
}
}
// 附赠：提示。 不占用主线程完成回显提示
-(void)LabXian:(NSString *)Xiaoxi
{
UILabel * label = [[UILabel alloc]initWithFrame:CGRectMake(ScreenWidth/2-80, ScreenHeight/2, 160, 40)];
label.backgroundColor = [UIColor blackColor];
label.alpha = 0.5;
label.font = [UIFont systemFontOfSize:14];
label.textAlignment = NSTextAlignmentCenter;
label.layer.cornerRadius = 10;//设置那个圆角的有多圆
label.layer.masksToBounds = YES;
label.text =Xiaoxi;
label.textColor = WhiteNoneColor;
[_scrollView addSubview:label];
//设置动画
CATransition * transion = [CATransition animation];
transion.type = @"push";//设置动画方式
transion.subtype = @"fromBotton";//设置动画从那个方向开始
[label.layer addAnimation:transion forKey:nil];//给Label.layer 添加动画 //设置延时效果
//不占用主线程
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(),^{
[label removeFromSuperview];
});
}
cell中添加，参数自己设定
复制以上代码到自己工程中，便可以解决图片简单处理问题。
PS：本人小白，如有更好方法请留言。互相学习、互相帮助。勿喷。谢谢
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