iOS个人整理15-UIImagePickerController,照片选择器
2016-01-30 09:01
549 查看
一、UIImagePickerController
这个文章大部分摘别人的,自己总结下来更方便用一点
UIImagePickerController是系统提供的用来获取图片和视频的接口
获取的途径为相机,图库,相册
分为以下几个步骤:
1. 初始化UIImagePickerController 类;
2. 设置UIImagePickerController 实例的数据来源类型(下面解释);
3. 设置代理;
4. 如果需要做图片修改的话设置allowsEditing =yes。
数据来源的类型有三种
用之前要检测设备是否支持
二、UIImagePickerController属性详解:
//指定使用照相机模式,可以指定使用相册/照片库
imagepicker.sourceType = UIImagePickerControllerSourceTypeCamera;
//设置当拍照完或在相册选完照片后,是否跳到编辑模式进行图片剪裁。只有当showsCameraControls属性为true时才有效果
imagepicker.allowsEditing = YES;
//设置拍照时的下方的工具栏是否显示,如果需要自定义拍摄界面,则可把该工具栏隐藏
imagepicker.showsCameraControls = YES;
//设置使用后置摄像头,可以使用前置摄像头
imagepicker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
//设置闪光灯模式
/*
typedef NS_ENUM(NSInteger, UIImagePickerControllerCameraFlashMode) {
UIImagePickerControllerCameraFlashModeOff = -1,
UIImagePickerControllerCameraFlashModeAuto = 0,
UIImagePickerControllerCameraFlashModeOn = 1
};
*/
imagepicker.cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto;
//设置相机支持的类型,拍照和录像
imagepicker.mediaTypes = @[(NSString*)kUTTypeImage,(NSString*)kUTTypeMovie];
//设置拍摄时屏幕的view的transform属性,可以实现旋转,缩放功能
// imagepicker.cameraViewTransform = CGAffineTransformMakeRotation(M_PI*45/180);
// imagepicker.cameraViewTransform = CGAffineTransformMakeScale(1.5, 1.5);
//所有含有cameraXXX的属性都必须要sourceType是UIImagePickerControllerSourceTypeCamera时设置才有效果,否则会有异常
//设置UIImagePickerController的代理
imagepicker.delegate = self;
-(void)showCamera{
//用模态方式呈现imagepicker,这个方法之后就会跳到对应的源位置,相机或者相册图库
[self presentModalViewController:imagepicker animated:YES];
}
代理方法
当用户选取完成后调用;
当用户取消选取时调用;
最后是我自己的实现,一般也就这么用了,点击相框进入相册,选一张图点choose,出来后相框就是选择的图了
效果如下
中间有个相框,点一下进入相册,在相册中选择一张图片,点choose,出来相框的图片就变了
![](https://oscdn.geek-share.com/Uploads/Images/Content/202007/14/9f81745fd25b0cc505d649411cd3be57)
![](https://oscdn.geek-share.com/Uploads/Images/Content/202007/14/084ba86006e1d7fa8e0fd9fc011371b2)
![](https://oscdn.geek-share.com/Uploads/Images/Content/202007/14/69e6d65f8f1a5786399774d2853a9287)
这个文章大部分摘别人的,自己总结下来更方便用一点
UIImagePickerController是系统提供的用来获取图片和视频的接口
获取的途径为相机,图库,相册
分为以下几个步骤:
1. 初始化UIImagePickerController 类;
2. 设置UIImagePickerController 实例的数据来源类型(下面解释);
3. 设置代理;
4. 如果需要做图片修改的话设置allowsEditing =yes。
数据来源的类型有三种
enum { UIImagePickerControllerSourceTypePhotoLibrary ,//来自图库 UIImagePickerControllerSourceTypeCamera ,//来自相机 UIImagePickerControllerSourceTypeSavedPhotosAlbum //来自相册 };
用之前要检测设备是否支持
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { NSLog(@"支持相机"); } if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) { NSLog(@"支持图库"); } if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum]) { NSLog(@"支持相片库"); }
二、UIImagePickerController属性详解:
//指定使用照相机模式,可以指定使用相册/照片库
imagepicker.sourceType = UIImagePickerControllerSourceTypeCamera;
//设置当拍照完或在相册选完照片后,是否跳到编辑模式进行图片剪裁。只有当showsCameraControls属性为true时才有效果
imagepicker.allowsEditing = YES;
//设置拍照时的下方的工具栏是否显示,如果需要自定义拍摄界面,则可把该工具栏隐藏
imagepicker.showsCameraControls = YES;
//设置使用后置摄像头,可以使用前置摄像头
imagepicker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
//设置闪光灯模式
/*
typedef NS_ENUM(NSInteger, UIImagePickerControllerCameraFlashMode) {
UIImagePickerControllerCameraFlashModeOff = -1,
UIImagePickerControllerCameraFlashModeAuto = 0,
UIImagePickerControllerCameraFlashModeOn = 1
};
*/
imagepicker.cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto;
//设置相机支持的类型,拍照和录像
imagepicker.mediaTypes = @[(NSString*)kUTTypeImage,(NSString*)kUTTypeMovie];
//设置拍摄时屏幕的view的transform属性,可以实现旋转,缩放功能
// imagepicker.cameraViewTransform = CGAffineTransformMakeRotation(M_PI*45/180);
// imagepicker.cameraViewTransform = CGAffineTransformMakeScale(1.5, 1.5);
//所有含有cameraXXX的属性都必须要sourceType是UIImagePickerControllerSourceTypeCamera时设置才有效果,否则会有异常
//设置UIImagePickerController的代理
imagepicker.delegate = self;
-(void)showCamera{
//用模态方式呈现imagepicker,这个方法之后就会跳到对应的源位置,相机或者相册图库
[self presentModalViewController:imagepicker animated:YES];
}
代理方法
当用户选取完成后调用;
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;
当用户取消选取时调用;
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;
最后是我自己的实现,一般也就这么用了,点击相框进入相册,选一张图点choose,出来后相框就是选择的图了
// #import "ThirdViewController.h" //签订协议 @interface ThirdViewController ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate> @property (nonatomic,retain)UIImageView *myImageView; @end @implementation ThirdViewController - (void)viewDidLoad { [super viewDidLoad]; //创建一块imageView _myImageView = [[UIImageView alloc]initWithFrame:CGRectMake((414-300)/2, 200, 300, 300)]; _myImageView.backgroundColor = [UIColor whiteColor]; //打开交互 _myImageView.userInteractionEnabled = YES; [self.view addSubview:_myImageView]; //添加一个手势 UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(selectImage:)]; [_myImageView addGestureRecognizer:tapGesture]; } //实现手势的方法,进入相册 -(void)selectImage:(UIButton*)sender { //创建ImagePickController UIImagePickerController *myPicker = [[UIImagePickerController alloc]init]; //创建源类型 UIImagePickerControllerSourceType mySourceType = UIImagePickerControllerSourceTypePhotoLibrary; myPicker.sourceType = mySourceType; //设置代理 myPicker.delegate = self; //设置可编辑 myPicker.allowsEditing = YES; //通过模态的方式推出系统相册 [self presentViewController:myPicker animated:YES completion:^{ NSLog(@"进入相册"); }]; } #pragma mark -- 实现imagePicker的代理方法 -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info { //取得所选取的图片,原大小,可编辑等,info是选取的图片的信息字典 UIImage *selectImage = [info objectForKey:UIImagePickerControllerEditedImage]; //设置图片进相框 self.myImageView.image = selectImage; [picker dismissViewControllerAnimated:YES completion:^{ NSLog(@"模态返回") ; }]; } @end
效果如下
中间有个相框,点一下进入相册,在相册中选择一张图片,点choose,出来相框的图片就变了
相关文章推荐
- PHP - PHP Error[2]: Error while sending QUERY packet. PID=*
- tkinter的GUI设计:界面与逻辑分离(二)-- 菜单栏
- HDOJ 2894 DeBruijin(dfs构造欧拉回路)
- #Hive#Hive Warning: Value had a \n character in it
- 使用pabot并发执行robotframework的testSuite
- UEFI引导修复教程
- UITableView的使用
- SQL Server ->> FIRST_VALUE和LAST_VALUE函数
- Performance Tuning Guidelines for Windows Server
- vue.js介绍
- 修改注册表出现“无法编辑UncheckedValue:写该值的新内容时出错”的解决方法
- tkinter的GUI设计:界面与逻辑分离(一)-- 初次见面
- DataTables warning : Requested unknown parameter '1' from the data source for row 0错误
- iOS UIButton倒计时闪烁问题
- [UIWindow endDisablingInterfaceAutorotationAnimated:] called on UITextEffectsWindow: ...without matc
- UITableView的性能优化
- perl weixin 获取uuid
- STLstack,queue
- UITableView
- (转)UEFI 启动:实际工作原理