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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