iOS图片的多选择，删除，和本地显示
这只在第三方ZYQAssetPickerController的基础上进行多图片选择
在点击事件写入
UIActionSheet *action = [[UIActionSheet alloc] initWithTitle:nil
delegate:self
cancelButtonTitle:@"取消"
destructiveButtonTitle:nil
otherButtonTitles:@"拍照", @"从手机相册选择", nil];
[action showInView:self.view];
＃park------ UIActionSheet代理方法
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0) {
//判断相机是否可用
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
[self showHint:@"相机不可用"];
return;
}else {
//打开相机
_sourceType = UIImagePickerControllerSourceTypeCamera;
if (!_imagePicker) {
_imagePicker = [[UIImagePickerController alloc] init];
[_imagePicker setAllowsEditing:YES];
[_imagePicker setDelegate:self];
}
[_imagePicker setSourceType:_sourceType];
[self presentViewController:_imagePicker animated:YES completion:nil];
}
} else if (buttonIndex == 1)
{
//打开相册
//_sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
//这里不用系统的，用第三方的，可以多选
ZYQAssetPickerController *picker = [[ZYQAssetPickerController alloc] init];
picker.maximumNumberOfSelection = 9-[_imageArr count];
picker.assetsFilter = [ALAssetsFilter allPhotos];
picker.showEmptyGroups=NO;
picker.delegate=self;
picker.selectionFilter = [NSPredicate predicateWithBlock:^BOOL(id evaluatedObject, NSDictionary *bindings) {
if ([[(ALAsset*)evaluatedObject valueForProperty:ALAssetPropertyType] isEqual:ALAssetTypeVideo]) {
NSTimeInterval duration = [[(ALAsset*)evaluatedObject valueForProperty:ALAssetPropertyDuration] doubleValue];
return duration >= 5;
} else {
return YES;
}
}];
[self presentViewController:picker animated:YES completion:NULL];
} else {
return;
}
}
#pragma mark - imagePickerController代理返回方法 其中对图片进行压缩处理
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
//因为选择的照片可能很大, 这里做一个压缩处理
[self dismissViewControllerAnimated:YES completion:^{
UIImage *selectImage = info[@"UIImagePickerControllerEditedImage"];//选取的照片
//压缩的的大小
CGFloat height = selectImage.size.height;
CGFloat width = selectImage.size.width;
CGFloat ratioSize = 1;
CGSize newSize;
NSInteger imgMaxHightSize = 800;
NSInteger imgMaxWidthSize = 500;
if (height > width && height > imgMaxHightSize)
{
ratioSize = 1 - (height - imgMaxHightSize ) / height;
}
else if (width > height && width > imgMaxWidthSize)
{
ratioSize = 1 - (width - imgMaxWidthSize) / width;
}
newSize = CGSizeMake(width*ratioSize, height*ratioSize);//压缩的的大小
UIGraphicsBeginImageContextWithOptions(newSize, YES, 1);
// 绘制改变大小的图片
[selectImage drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
// 从当前context中创建一个改变大小后的图片
UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
// 使当前的context出堆栈
UIGraphicsEndImageContext();
[_imageArr addObject:scaledImage];
[self ShowFoodImage];//显示图片
}];
}
#pragma mark -ZYQAssetPickerController Delegate
-(void)assetPickerController:(ZYQAssetPickerController *)picker didFinishPickingAssets:(NSArray *)assets{
if (assets.count==0) {
return;
}
UIImage * image=(UIImage *)[assets objectAtIndex:0];
[addImgButton setImage:image forState:UIControlStateNormal];
for (int i=0; i
ALAsset *asset=assets[i];
UIImage *tempImg=[UIImage imageWithCGImage:asset.defaultRepresentation.fullScreenImage];
//压缩的的大小
CGFloat height = tempImg.size.height;
CGFloat width = tempImg.size.width;
CGFloat ratioSize = 1;
CGSize newSize;
NSInteger imgMaxHightSize = 800;
NSInteger imgMaxWidthSize = 500;
if (height > width && height > imgMaxHightSize)
{
ratioSize = 1 - (height - imgMaxHightSize ) / height;
}
else if (width > height && width > imgMaxWidthSize)
{
ratioSize = 1 - (width - imgMaxWidthSize) / width;
}
newSize = CGSizeMake(width*ratioSize, height*ratioSize);//压缩的的大小
UIGraphicsBeginImageContextWithOptions(newSize, YES, 1);
// 绘制改变大小的图片
[tempImg drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
// 从当前context中创建一个改变大小后的图片
UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
// 使当前的context出堆栈
UIGraphicsEndImageContext();
[_imageArr addObject:scaledImage];
}
[self ShowFoodImage];//显示图片
}
在写完代理方法后可以看到选择图片或者拍照取消按钮不显示，少些了一个代理
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:NO completion:nil];
}
下面就是显示图片了 [ self ShowFoodImage ]; // 显示图片，在图片进行删除
- (void)ShowFoodImage{
if ([_imageArr count]>0) {
int row=2;
if ([_imageArr count]==9) {
if (([_imageArr count])%4==0){
row=([_imageArr count]+1)/3;
}
else{
row=(([_imageArr count])/4)+1 ;
}
}else{
if (([_imageArr count]+1)%4==0){
row=([_imageArr count]+1)/4;
}
else{
row=(([_imageArr count]+1)/4)+1 ;
}
}
float add_Height=(row-1)*(Image_Height+12);
_showImageView_Height=Image_Height+16+add_Height+20;
[_showImageView setFrame:CGRectMake(0,_sigLabel.frame.origin.y+_sigLabel.frame.size.height,__MainView_Width-(EdgeDistance*2) ,_showImageView_Height)];
[_showStarView setFrame:CGRectMake(0,_showImageView.frame.origin.y+_showImageView.frame.size.height ,__MainView_Width , 145+10)];
[_recommendFoodView setFrame:CGRectMake(0,_showStarView.frame.origin.y+_showStarView.frame.size.height,__MainView_Width, _recommendFoodView_Height)];
[_bottomView setFrame:CGRectMake(0,_recommendFoodView.frame.origin.y+_recommendFoodView.frame.size.height ,__MainView_Width, 45+25+40)];
float view__Height=__MainView_Height;
if ((commentTextView.frame.size.height+_showImageView.frame.size.height+_showStarView.frame.size.height+_recommendFoodView.frame.size.height+_bottomView.frame.size.height)>__MainView_Height) {
view__Height=commentTextView.frame.size.height+_showImageView.frame.size.height+_showStarView.frame.size.height+_recommendFoodView.frame.size.height+_bottomView.frame.size.height+20;
}else
{
view__Height=__MainView_Height;
}
[_scrollView setContentSize:CGSizeMake(__MainView_Width, view__Height)];
}
//移除之前的数据
for (UIView * views in _showImageView.subviews)
{
[views removeFromSuperview];
}
for (int i = 0 ; i < (_imageArr.count +1); i ++)
{
int n = i%4;
NSInteger f = i/4;
if (i==_imageArr.count)
{
if ([_imageArr count]<9) {
addImgButton=[UIButton buttonWithType:0];
[addImgButton setImage:[UIImage imageNamed:@"imageAdd"] forState:UIControlStateNormal];
[addImgButton setFrame:CGRectMake(Distance+(Image_Width+Distance)*n, 8+(Image_Height+12)*f+20, Image_Width, Image_Height)];
[addImgButton addTarget:self action:@selector(addImgButtonClick:) forControlEvents:UIControlEventTouchUpInside];
[_showImageView addSubview:addImgButton];
}
}else{
UIButton * dragBu = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[dragBu setFrame:CGRectMake(Distance+(Image_Width+Distance)*n, 8+(Image_Height+12)*f+20, Image_Width, Image_Height)];
dragBu.tag = 100000;
dragBu.adjustsImageWhenHighlighted = NO;
[dragBu.imageView setContentMode:UIViewContentModeScaleAspectFill];
[dragBu setBackgroundImage:[_imageArr objectAtIndex:i] forState:UIControlStateNormal];
UILongPressGestureRecognizer *longTap = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longAction:)];
[dragBu addGestureRecognizer:longTap];
_deleteImage = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 20, 20)];
_deleteImage.clipsToBounds = YES;
[_deleteImage.layer setCornerRadius:_deleteImage.bounds.size.width/2];
_deleteImage.layer.masksToBounds = YES;
_deleteImage.layer.borderWidth = 0.5;
_deleteImage.layer.borderColor = [[UIColor whiteColor] CGColor];
_deleteImage.image = [UIImage imageNamed:@"delete"];
[_deleteImage setHidden:YES];
_deleteImage.userInteractionEnabled = YES;
_deleteImage.tag = i;
_deleteImage.backgroundColor = [UIColor whiteColor];
UITapGestureRecognizer *deleteTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(removeImage:)];
[_deleteImage addGestureRecognizer:deleteTap];
[dragBu addSubview:_deleteImage];
[_showImageView addSubview:dragBu];
}
}
}
//长安图片显示删除按钮
- (void)longAction:(UILongPressGestureRecognizer *)g
{
UIButton *btn = (UIButton *)g.view;
for (UIView *view in btn.subviews)
{
[view setHidden:NO];
}
}
// 图片删除重新显示
- (void)removeImage:(UITapGestureRecognizer *)deleImageView
{
UIImageView *image =(UIImageView *)deleImageView.view;
NSInteger index = image.tag;
[_imageArr removeObjectAtIndex:index];
[self ShowFoodImage];
}
完成