iOS 简单封装一个相机 (附demo)

demo地址

2017.8.1第二次更新

iOS 10之后，使用相机以及相册功能需要在plist文件中添加权限：

相机权限： Privacy - Camera Usage Description
相册权限： Privacy - Photo Library Usage Description

界面默认是英文界面需要修改infoPlist文件

Localization native development region  = china 

0.建立一个新的工具类,继承自NSObject

1.在.h文件中一个单例方法和一个开始照相方法

+ (instancetype)sharedManager;
- (void)startPhoto;

2.在.m文件中分别实现这两个方法

单例

+ (instancetype)sharedManager {
    
    static GHPhoto *_instance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        
        _instance = [[self alloc] init];
    });
    return _instance;
}

开始拍照

- (void)startPhoto {
    if([UIImagePickerController isSourceTypeAvailable:(UIImagePickerControllerSourceTypeCamera)]) {
        
        _pickerController = [[UIImagePickerController alloc]init];
        
        _pickerController.delegate = self;
        
        _pickerController.allowsEditing=YES;
        
        _pickerController.sourceType =UIImagePickerControllerSourceTypeCamera;
        [[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:_pickerController animated:YES completion:nil];
    }
}

3.在.m文件中遵守两个协议

<UIImagePickerControllerDelegate,UINavigationControllerDelegate>

4.在.m文件中实现相机的回调

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

/// 你得代码
    [[UIApplication sharedApplication].keyWindow.rootViewController dismissViewControllerAnimated:YES completion:nil];
}

5.在,h中声明一个block用来传出拍照完成的图片

typedef void (^FinishedBlock)(id object);
@property (nonatomic , copy)FinishedBlock Finishedblock;

6.在,m中实现这个block

- (void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
    /// 在这里拿到照片
    //    NSDate
    NSString *img = info[@"UIImagePickerControllerOriginalImage"];
    if (self.Finishedblock) {
        self.Finishedblock(img);
    }

    //    [self.currentVc dismissViewControllerAnimated:YES completion:nil];
    [[UIApplication sharedApplication].keyWindow.rootViewController dismissViewControllerAnimated:YES completion:nil];
}

7.使用方法,在你要调用相机的地方添加如下代码

    [[GHPhoto sharedManager] startPhoto];

8.在你想要拿到图片的地方添加如下代码

 [GHPhoto sharedManager].Finishedblock = ^ (NSString *image) {
        NSLog(@"我是图片");
    };