iOS - 调用系统相机,相册,上传图片方法封装.代码经过多次优化,封装了起来(单独一个类).这样可以大大的简化Controller的代码量.使Controller更加轻量化.

首先是.h文件中

#import <Foundation/Foundation.h>

/*  ============================================================  */
// ** 宏定义单例模式方便外界调用
#define UPLOAD_IMAGE [DUX_UploadUserIcon shareUploadImage]

// ** 代理方法
@protocol DUX_UploadUserIconDelegate <NSObject>

@optional
// ** 处理图片的方法
- (void)uploadImageToServerWithImage:(UIImage *)image;

@end

/*  ============================================================  */
@interface DUX_UploadUserIcon : NSObject <UIActionSheetDelegate, UINavigationControllerDelegate, UIImagePickerControllerDelegate>

@property (nonatomic, weak) id <DUX_UploadUserIconDelegate> uploadImageDelegate;
@property(nonatomic,strong) UIViewController * fatherViewController;

// ** 单例方法
+ (DUX_UploadUserIcon *)shareUploadImage;

// ** 弹出选项窗口的方法
- (void)showActionSheetInFatherViewController:(UIViewController *)fatherVC delegate:(id<DUX_UploadUserIconDelegate>)aDelegate;

@end

接下来是.m文件中的实现

#import "DUX_UploadUserIcon.h"

static DUX_UploadUserIcon *uploadUserIcon = nil;

@implementation DUX_UploadUserIcon

/*  ============================================================  */
#pragma mark - 单例方法
+ (DUX_UploadUserIcon *)shareUploadImage {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        uploadUserIcon = [[DUX_UploadUserIcon alloc] init];
    });
    return uploadUserIcon;
}

/*  ============================================================  */
#pragma mark - 显示ActionSheet方法
- (void)showActionSheetInFatherViewController:(UIViewController *)fatherVC delegate:(id<DUX_UploadUserIconDelegate>)aDelegate {

    uploadUserIcon.uploadImageDelegate = aDelegate;
    self.fatherViewController = fatherVC;
    UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil
                                                       delegate:self
                                              cancelButtonTitle:@"取消"
                                         destructiveButtonTitle:nil
                                              otherButtonTitles:@"相册", @"拍照", nil];
    [sheet showInView:fatherVC.view];
}

#pragma mark - UIActionSheetDelegate
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        [self fromPhotos];
    }else if (buttonIndex == 1) {
        [self createPhotoView];
    }
}

/*  ============================================================  */
#pragma mark - 头像图片(从相机中选择得到)
- (void)createPhotoView {
    // ** 设置相机模式
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        UIImagePickerController *imagePC = [[UIImagePickerController alloc] init];
        imagePC.sourceType  = UIImagePickerControllerSourceTypeCamera;
        imagePC.delegate = self;
        imagePC.allowsEditing = YES;
        [_fatherViewController presentViewController:imagePC animated:YES completion:nil];
    } else {
        UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"提示"
                                                         message:@"该设备没有照相机"
                                                        delegate:nil
                                               cancelButtonTitle:@"确定"
                                               otherButtonTitles:nil];
        [alert show];
    }
}

/*  ============================================================  */
#pragma mark - 图片库方法(从手机的图片库中查找图片)
- (void)fromPhotos {
    UIImagePickerController *imagePC = [[UIImagePickerController alloc] init];
    imagePC.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePC.delegate = self;
    imagePC.allowsEditing = YES;
    [_fatherViewController presentViewController:imagePC animated:YES completion:nil];
}

#pragma mark - UIImagePickerControllerDelegate
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    [picker dismissViewControllerAnimated:YES completion:nil];
    UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
    // ** 上传用户头像
    if (self.uploadImageDelegate && [self.uploadImageDelegate respondsToSelector:@selector(uploadImageToServerWithImage:)]) {
        [self.uploadImageDelegate uploadImageToServerWithImage:image];
    }
}

@end

好了以上就是全部的实现方法,接下来给大家演示一下究竟如何使用!(写博客告诉别人怎样使用,提供案例是一个高尚的情怀~~~~~~~)

在你需要调用这个类的viewcontroller中首先遵守协议

viewController.m中

@interface DUX_MyViewController ()<DUX_UploadUserIconDelegate>
      ...你的内容...
@end

然后在一个方法中调用

- (void)openImagePickerView {
    [UPLOAD_IMAGE showActionSheetInFatherViewController:self delegate:self];
}

实现代理方法

#pragma mark - 代理方法
- (void)uploadImageToServerWithImage:(UIImage *)image {
    --这里得到的图片你自己去进行处理(例如:压缩啊,裁剪啊,等等的).
}

好,以上就是iOS中设置用户头像时调用系统原生的相册,相机的方法封装.大家可以打过去直接使用,也欢迎大家进行修改,提供更好的使用方法.欢迎大家一同讨论学习!

~~~~~~~~~_终~~~~~~~~~~