iOS 图片相册调用封装

开发项目中，经常会用到调用相册，拍照获取照片等等。于是特地把这个功能封装了一下，方便以后重复使用。

使用方法如下：

#import "LYImagePicker.h"

[[LYImagePicker sharePicker] showPickerWith:self allowEdit:NO completeBlock:^(UIImage *image) {
//image就是选择到的图片，并且压缩了一下
}];

self传入的是当前的UIViewController

allowEdit 是指选择图像时是否允许编辑

下面上代码

#import <UIKit/UIKit.h>
@interface LYImagePicker : NSObject<UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIActionSheetDelegate>
+ (LYImagePicker *)sharePicker;
- (void)showPickerWith:(UIViewController *)viewController
allowEdit:(BOOL)allowEdit
completeBlock:(void (^)(UIImage *image))image;
@end

#import "LYImagePicker.h"

@implementation LYImagePicker{
void (^ImageBlock)(UIImage *image);
UIViewController *_viewController;
BOOL _allowEdit;
}

static LYImagePicker* _picker;

+ (LYImagePicker *)sharePicker{
if (!_picker) {
_picker = [[LYImagePicker alloc]init];
}
return _picker;
}

- (void)showPickerWith:(UIViewController *)viewController
allowEdit:(BOOL)allowEdit
completeBlock:(void (^)(UIImage *image))image{
UIActionSheet *sheet = [[UIActionSheet alloc]initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"从相册选择",@"拍一张", nil];
[sheet showInView:viewController.view];
_allowEdit = allowEdit;
_viewController = viewController;
ImageBlock = image;
}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex < 2) {
[self showPickerView:buttonIndex];
}
}

- (void)showPickerView:(NSInteger)buttonIndex{
UIImagePickerController* picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = _allowEdit;
if (buttonIndex == 0) {
picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
}else{
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
}
[_viewController presentViewController:picker animated:YES completion:nil];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
[picker dismissViewControllerAnimated:YES completion:nil];
NSData *imageData;
if (_allowEdit) {
imageData = UIImageJPEGRepresentation([info objectForKey:@"UIImagePickerControllerEditedImage"], 0.5);
}else{
imageData = UIImageJPEGRepresentation([info objectForKey:@"UIImagePickerControllerOriginalImage"], 0.5);
}
UIImage *image = [UIImage imageWithData:imageData];
ImageBlock(image);
}

@end

有更好的建议请留言给我，感谢！