IOS - 使用 QBImagePickerController 从系统相册选取多张照片

使用pod引入

pod 'QBImagePickerController', '~>2.6.0'

导入

#import <QBImagePickerController.h>

加入代理

@interface ImagePickeriewController ()<QBImagePickerControllerDelegate>

@end

init

QBImagePickerController *picker = [[QBImagePickerController alloc] init];
picker.maximumNumberOfSelection = 5;
picker.prompt = @"选取图片"；
picker.allowsMultipleSelection = YES;
picker.showsNumberOfSelectedAssets = YES;
picker.delegate = self;
picker.automaticallyAdjustsScrollViewInsets = NO;
[self presentViewController:picker animated:YES completion:nil];

delegate方法

- (void)qb_imagePickerController:(QBImagePickerController *)imagePickerController didSelectAssets:(NSArray *)assets{
[self dismissViewControllerAnimated:YES completion:nil];

NSMutableArray *imageMutableArray = [[NSMutableArray alloc] init];
[imageMutableArray removeAllObjects];
NSInteger n = 0;
for (ALAsset * asset in assets) {
CGImageRef ref = [asset thumbnail];    //获取缩略图
UIImage *thumbnailImg = [[UIImage alloc]initWithCGImage:ref];
[imageMutableArray addObject:thumbnailImg];
n++;
}

UIImageView *imageView;
for (int i = 0; i < n; i++) {
imageView = [[UIImageView alloc] init];
imageView.image = imageMutableArray[i];
[self.view addSubview:imageView];
[imageView mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(self.photoImage.mas_left).offset(45 * i);
make.bottom.equalTo(self.photoView.mas_bottom).offset(-10);
make.size.mas_equalTo(CGSizeMake(35, 35));
}];
}

_photoImage = [[UIImageView alloc] init];
_photoImage.image = [UIImage imageNamed:@"picture.png"];
[self.view addSubview:self.photoImage];
[self.photoImage mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(imageView.mas_right).offset(10);
make.centerY.equalTo(imageView.mas_centerY);
make.size.mas_equalTo(CGSizeMake(35, 35));
}];

_photoImage.userInteractionEnabled = YES;
UITapGestureRecognizer *photoImageTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(photoImageClicked)];
photoImageTap.numberOfTapsRequired = 1;
photoImageTap.numberOfTouchesRequired = 1;
[_photoImage addGestureRecognizer:photoImageTap];

}

- (void)qb_imagePickerControllerDidCancel:(QBImagePickerController *)imagePickerController{
[self dismissViewControllerAnimated:YES completion:nil];
}

附：

获得的ALAsset对象就是相片对象：其中有相片的缩略图，全屏图，高清图，url等属性。

ALAsset *result = [assets objectAtIndex:index];

获取url：

String类型：

NSString *url = [[[result

defaultRepresentation]url]description];

URL类型：

NSURL *url = [[result defaultRepresentation]url];

获取缩略图：

CGImageRef ref = [result thumbnail];

UIImage *img = [[UIImage alloc]initWithCGImage:ref];

获取全屏相片：

CGImageRef ref = [[result defaultRepresentation]fullScreenImage];

UIImage *img = [[UIImage alloc]initWithCGImage:ref];

获取高清相片：

CGImageRef ref = [[result defaultRepresentation]fullResolutionImage];

UIImage *img = [[UIImage alloc]initWithCGImage:ref];

参考：http://blog.csdn.net/CHN_liu/article/details/45599511