UIImagePickerController之Block回调

方法使用：引入头文件 

#import "UIImagePickerController+Block.h"

我这拖出来的两个属性

@property (weak, nonatomic) IBOutlet UIImageView *showImageView;

- (IBAction)openClick;

// 实用方法

- (IBAction)openClick {

    

    UIImagePickerController_Block *imagePickerVC = [UIImagePickerController_Block defaultController];

    

    [imagePickerVC initWith:self SourceType:UIImagePickerControllerSourceTypePhotoLibrary  backBlcok:^(id obj) {

   

         self.showImageView.image = obj;

        

    }];

}

UIImagePickerController+Block.h文件如下 

#import <UIKit/UIKit.h>

 

typedef void (^CallBackBlcok) (id obj);

 

 

@interface UIImagePickerController_Block : UIImagePickerController

 

+ (UIImagePickerController_Block *)defaultController;

 

 

/**

 * @brief 选中照片回调方法.

 *

 * @param controller        当前控制器

 *

 * @param type              相片来源

 *

 * @param callbackblock     回调block,返回选中的image对象

 *

 */

- (void)initWith:(UIViewController *)controller SourceType:(UIImagePickerControllerSourceType)type backBlcok:(CallBackBlcok)callbackblcok;

 

UIImagePickerController+Block.m文件如下 

 

//

//  UIImagePickerController+Block.m

//  UIImagePickerController+Block

//

//  Created by Apple on 15/9/24.

//  Copyright © 2015年 Zhipin. All rights reserved.

//

 

#import "UIImagePickerController+Block.h"

#import <objc/runtime.h>

 

static id blockkey;

 

@interface UIImagePickerController_Block ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>

 

 

@end

 

@implementation UIImagePickerController_Block

 

 

 

+ (UIImagePickerController_Block *)defaultController{

    

    static UIImagePickerController_Block *intance;

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        intance = [[self alloc]init];

    });

    return intance;

}

 

 

#pragma mark - ============== 选中照片的回调

- (void)initWith:(UIViewController *)controller SourceType:(UIImagePickerControllerSourceType)type backBlcok:(CallBackBlcok)callbackblcok{

    

    objc_setAssociatedObject(self, &blockkey, callbackblcok, OBJC_ASSOCIATION_COPY_NONATOMIC);

    

    UIImagePickerController_Block *imageViewController = [UIImagePickerController_Block new];

    // 设置照片来源

    imageViewController.sourceType = type;

    // 设置代理

    imageViewController.delegate   = self;

    [controller  presentViewController:imageViewController animated:YES completion:nil];

}

#pragma mark - ============== 选中照片

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

    

    // UIImagePickerControllerOriginalImage 原始图片

    // UIImagePickerControllerEditedImage 编辑后图片

    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

    

    CallBackBlcok block = (CallBackBlcok)objc_getAssociatedObject(self, &blockkey);

    if (block) {

        block(image);

    }

    

    [picker dismissViewControllerAnimated:YES completion:NULL];

    

}

 

 

 

#pragma mark - ============== 取消相册

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

    

    [picker dismissViewControllerAnimated:YES completion:NULL];

    

}

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

}

 

 

@end

 

 

==================== 纯手打。。。。。。。。==================

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