IOS 开发之操作图库自定义控制器

IOS 开发之操作图库自定义控制器

步骤如下：

新建此类的代理属性必须遵守的协议：

新建PhotoButtonDelegate.h如下：

//
// PhotoButtonDelegate.h
// 作业整理
//
// Created by apple on 15/9/16.
// Copyright (c) 2015年 LiuXun. All rights reserved.
// 

#import <Foundation/Foundation.h>
@class ImageAndPhotos;
@protocol PhotoButtonDelegate <NSObject> 

-(void) setPhotoButton:(ImageAndPhotos *) imgAndP;
@end

新建此类如下：

编辑ImageAndPhotos.h如下：

//
// ImageAndPhotos.h
// 作业整理
//
// Created by apple on 15/9/16.
// Copyright (c) 2015年 LiuXun. All rights reserved.
// 

#import <Foundation/Foundation.h>
#import "PhotoButtonDelegate.h"
@class UIBaseScrollView;
@interface ImageAndPhotos : NSObject <UIAlertViewDelegate,UIActionSheetDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate> 

@property (nonatomic, strong) UIViewController *controller;
@property (nonatomic, strong) UIImage *img;
@property (nonatomic, strong) UIButton *btn;
@property (nonatomic, weak) id<PhotoButtonDelegate> delegate; 

-(id)initWithControler:(UIViewController *) crtler AndButton:(UIButton *) button;
@end

编辑ImageAndPhotos.m如下：

//
// ImageAndPhotos.m
// 作业整理
//
// Created by apple on 15/9/16.
// Copyright (c) 2015年 LiuXun. All rights reserved.
// 

#import "ImageAndPhotos.h" 

@implementation ImageAndPhotos 

-(id)initWithControler:(UIViewController *) crtler AndButton:(UIButton *) button
{
  if (self = [super init]) {
    self.controller = crtler;
    self.btn = button;
    [self CameraEvent];
  }
  return self;
} 

-(void)CameraEvent
{
  [self.btn addTarget:self action:@selector(showActionSheet) forControlEvents:UIControlEventTouchUpInside];
} 

-(void) showActionSheet
{
  UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照",@"我的相册", nil nil];
  [actionSheet showInView:self.controller.view];
 } 

// 实现UIActionSheetDelegate协议中监听按钮的方法
-(void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
  if (buttonIndex == 0) {
    [self addCamera];
  }
  else if(buttonIndex == 1)
  {
    [self addPhoto];
  } 

} 

-(void)addCamera
{
  // 判断是否可以打开一个相机
  if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
    // 创建一个调出拍照的控制器
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    // 摄像头
    NSLog(@"++++addCamera++++");
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    [self.controller presentViewController:picker animated:YES completion:^{ 

    }];
  }
  else
  {
    [self showAlertView];
  }
}
-(void) addPhoto
{   // 相册可以用模拟器打开，但是相机不可以用模拟器打开
  if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
    UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 

    picker.delegate = self;
    picker.allowsEditing = YES; // 是否可以编辑 

    // 打开相册选择相片
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //表示管理图库
    [self.controller presentViewController:picker animated:YES completion:nil]; 

  }
  else
  {
    [self showAlertView];
  } 

} 

-(void)showAlertView
{
  UIAlertView *alert =[[UIAlertView alloc] initWithTitle:@"提示" message:@"你没有摄像头" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil nil];
  [alert show];
} 

// 代理协议中的方法
// 拍摄完成后,其实是选中图片后的方法要执行的方法，如果是照相的话则选中拍照后的相片
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
  // 得到图片
  self.img = [info objectForKey:UIImagePickerControllerEditedImage];
  // 图片存入图库
  if (picker.sourceType == UIImagePickerControllerSourceTypeCamera) {
    UIImageWriteToSavedPhotosAlbum(self.img, nil, nil, nil); // 如果是相机
  } 

  [self.controller dismissViewControllerAnimated:YES completion:^{
    if ([self.delegate respondsToSelector:@selector(setPhotoButton:)]) {
      [self.delegate setPhotoButton:self];
    }
  }]; 

} 

//选中图片点击cancel按钮后执行的方法
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{ 

  [self.controller dismissViewControllerAnimated:YES completion:nil];
} 

@end

此类新建完成，在自定义控件中的应用如下：（此自定义控件是一个上传图片的scrollVIew）

新建自定义控件类编辑UIBaseScrollView.h如下

//
// UIBaseScrollView.h
// 作业整理
//
// Created by apple on 15/9/16.
// Copyright (c) 2015年 LiuXun. All rights reserved.
// 

#import "UIBaseVIew.h"
#import "ImageAndPhotos.h" 

@interface UIBaseScrollView : UIBaseVIew<PhotoButtonDelegate> 

@property (nonatomic, strong) NSMutableArray *arrayImgs;
@property (nonatomic, strong) UIScrollView *scroll;
@property (nonatomic, strong) ImageAndPhotos *imgChange;
@property (nonatomic, strong) UIButton *btnImg;
@property (nonatomic, strong) UIImageView *imgV;
-(id)initWithFrame:(CGRect)frame CurrenContr:(UIViewController *) crtl; 

@end
编辑定义控件的.m文件如下：

[objc] view plain copy
//
// UIBaseScrollView.m
// 作业整理
//
// Created by apple on 15/9/16.
// Copyright (c) 2015年 LiuXun. All rights reserved.
// 

#import "UIBaseScrollView.h" 

@implementation UIBaseScrollView 

-(id)initWithFrame:(CGRect)frame CurrenContr:(UIViewController *) crtl
{
  if (self = [super initWithFrame:frame]) {
    self.scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)]; 

    self.btnImg = [[UIButton alloc] initWithFrame:CGRectMake(10, 10, frame.size.height-20, frame.size.height-20)];
    [self.btnImg setImage:[UIImage imageNamed:@"tizhong_photo_increase_bj"] forState:UIControlStateNormal]; 

    self.imgChange = [[ImageAndPhotos alloc] initWithControler:crtl AndButton:self.btnImg];
    self.scroll.showsHorizontalScrollIndicator = YES;
    self.imgChange.delegate = self;
    [self.scroll addSubview:self.btnImg];
    [self addSubview:self.scroll];
  }
  return self;
} 

-(void)setPhotoButton:(ImageAndPhotos *)imgAndP
{
  NSLog(@"%@&&&&&&&&&",self.imgChange.img);
  if (imgAndP.img) {
    self.imgV =[[UIImageView alloc] initWithFrame: self.btnImg.frame ];
    self.imgV.image = imgAndP.img;
    self.imgV.backgroundColor = [UIColor yellowColor];
    [self.scroll addSubview:self.imgV];
    self.btnImg.frame = CGRectMake(CGRectGetMaxX(self.imgV.frame)+10, self.imgV.frame.origin.y, self.imgV.frame.size.width, self.imgV.frame.size.height);
    self.scroll.contentSize = CGSizeMake(CGRectGetMaxX(imgAndP.btn.frame)+10, 0);
    if (CGRectGetMaxX(self.btnImg.frame)>self.scroll.frame.size.width) {
      self.scroll.contentOffset = CGPointMake(self.btnImg.frame.origin.x-10, 0);
    }
  } 

} 

@end

在控制器中使用此自定义控件如下：

UIBaseScrollView *det5 = [[UIBaseScrollView alloc] initWithFrame:CGRectMake
(20, CGRectGetMaxY(det4.frame)+20, WIDTH-40, 80) CurrenContr:self]; 

运行结果如下：

在控制器中直接使用此相册类也与此类似，不同之处就是让所在控制器遵守类属性的协议，然后实现即可，在此不再奥数。

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