#import "AssetsLibrary/AssetsLibrary.h"
@interfaceBigPictureViewController()
/**图片*/
@property(nonatomic,weak)UIImageView*imageView;
/**相册库*/
@property(nonatomic,strong)ALAssetsLibrary*library;
@end
@implementationBigPictureViewController
- (ALAssetsLibrary*)library
{
if(!_library) {
_library= [[ALAssetsLibraryalloc]init];
}
return_library;
}
- (IBAction)back {
[selfdismissViewControllerAnimated:YEScompletion:nil];
}
- (void)viewDidLoad {
[superviewDidLoad];
//滚动控件
UIScrollView*scrollView = [[UIScrollViewalloc]init];
scrollView.frame= [UIScreenmainScreen].bounds;
scrollView.backgroundColor= [UIColorblackColor];
scrollView.delegate=self;
[self.viewinsertSubview:scrollViewatIndex:0];
//图片
UIImageView*imageView = [[UIImageViewalloc]init];
[imageViewsd_setImageWithURL:[NSURLURLWithString:self.topic.image1]];
[scrollViewaddSubview:imageView];
self.imageView= imageView;
//图片的尺寸
imageView.x=0;
imageView.width=XMGScreenW;
imageView.height=self.topic.height* imageView.width/self.topic.width;
if(imageView.height>XMGScreenH) {//图片过长
imageView.y=0;
scrollView.contentSize=CGSizeMake(0, imageView.height);
}else{//图片居中显示
imageView.centerY=XMGScreenH*0.5;
}
//伸缩
CGFloatmaxScale =self.topic.height/ imageView.height;
if(maxScale >1.0) {
scrollView.maximumZoomScale= maxScale;
}
}
staticNSString*constXMGGroupNameKey =@"GroupNameKey";
staticNSString*constXMGDefaultGroupName =@"XXXXXXXX";
- (NSString*)groupName
{
//先从沙盒中取得名字
NSString*groupName = [[NSUserDefaultsstandardUserDefaults]stringForKey:XMGGroupNameKey];
if(groupName ==nil) {//沙盒中没有存储任何文件夹的名字
groupName =XMGDefaultGroupName;
//存储名字到沙盒中
[[NSUserDefaultsstandardUserDefaults]setObject:groupNameforKey:XMGGroupNameKey];
[[NSUserDefaultsstandardUserDefaults]synchronize];
}
returngroupName;
}
- (IBAction)save
{
//获得文件夹的名字
__blockNSString*groupName = [selfgroupName];
// self的弱引用
XMGWeakSelf;
//图片库
__weakALAssetsLibrary*weakLibrary =self.library;
//创建文件夹
[weakLibraryaddAssetsGroupAlbumWithName:groupNameresultBlock:^(ALAssetsGroup*group) {
if(group) {//新创建的文件夹
//添加图片到文件夹中
[weakSelfaddImageToGroup:group];
}else{//文件夹已经存在
[weakLibraryenumerateGroupsWithTypes:ALAssetsGroupAllusingBlock:^(ALAssetsGroup*group,BOOL*stop) {
NSString*name = [groupvalueForProperty:ALAssetsGroupPropertyName];
if([nameisEqualToString:groupName]) {//是自己创建的文件夹
//添加图片到文件夹中
[weakSelfaddImageToGroup:group];
*stop =YES;//停止遍历
}elseif([nameisEqualToString:@"Camera Roll"]) {
//文件夹被用户强制删除了
groupName = [groupNamestringByAppendingString:@" "];
//存储新的名字
[[NSUserDefaultsstandardUserDefaults]setObject:groupNameforKey:XMGGroupNameKey];
[[NSUserDefaultsstandardUserDefaults]synchronize];
//创建新的文件夹
[weakLibraryaddAssetsGroupAlbumWithName:groupNameresultBlock:^(ALAssetsGroup*group) {
//添加图片到文件夹中
[weakSelfaddImageToGroup:group];
}failureBlock:nil];
}
}failureBlock:nil];
}
}failureBlock:nil];
}
/**
*添加一张图片到某个文件夹中
*/
- (void)addImageToGroup:(ALAssetsGroup*)group
{
__weakALAssetsLibrary*weakLibrary =self.library;
//需要保存的图片
CGImageRefimage =self.imageView.image.CGImage;
//添加图片到【相机胶卷】
[weakLibrarywriteImageToSavedPhotosAlbum:imagemetadata:nilcompletionBlock:^(NSURL*assetURL,NSError*error) {
[weakLibraryassetForURL:assetURLresultBlock:^(ALAsset*asset) {
//添加一张图片到自定义的文件夹中
[groupaddAsset:asset];
[SVProgressHUDshowSuccessWithStatus:@"保存成功!"];
}failureBlock:nil];
}];
}
- (void)getAllPhotos
{
ALAssetsLibrary*library = [[ALAssetsLibraryalloc]init];
//遍历所有的文件夹,一个ALAssetsGroup对象就代表一个文件夹
[libraryenumerateGroupsWithTypes:ALAssetsGroupAllusingBlock:^(ALAssetsGroup*group,BOOL*stop) {
//遍历文件夹内的所有多媒体文件（图片、视频）,一个ALAsset对象就代表一张图片
[groupenumerateAssetsUsingBlock:^(ALAsset*result,NSUIntegerindex,BOOL*stop) {
//缩略图
XMGLog(@"%@", [UIImage imageWithCGImage:result.thumbnail]);
//获得原始图片
//XMGLog(@"%@", [UIImage imageWithCGImage:result.defaultRepresentation.fullResolutionImage]);
}];
}failureBlock:nil];
}
//自定义照相机: AVCaptureSession
//通过拍照获得一张图片
//UIImagePickerController *picker = [[UIImagePickerController alloc] init];
//picker.sourceType = UIImagePickerControllerSourceTypeCamera;
//[self presentViewController:picker animated:YES completion:nil];
//从相册中挑选一张图片
//UIImagePickerController *picker = [[UIImagePickerController alloc] init];
//picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
//[self presentViewController:picker animated:YES completion:nil];
#pragma mark -
- (UIView*)viewForZoomingInScrollView:(UIScrollView*)scrollView
{
returnself.imageView;
}
@end
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