UIImagePickerController总结

目前有个问题:用iPad剪裁后的照片选择后,只剩下了左上角一部分.原因不明.还望大神不吝赐教.

以下内容来自网络,本人总结自看:
iOS 获取图片有三种方法:

  1. 直接调用摄像头拍照
  2. 从相册中选择
  3. 从图库中选择
UIImagePickerController 是系统提供的用来获取图片和视频的接口;
UIImagePickerController 类来获取图片视频,大体分为以下几个步骤:

 1. 初始化UIImagePickerController 类;
 2. 设置UIImagePickerController 实例的数据来源类型(下面解释);
 3. 设置设置代理;
 4. 如果需要做图片修改的话设置allowsEditing =yes。
数据来源类型一共有三种:

enum {
     UIImagePickerControllerSourceTypePhotoLibrary ,//来自图库
     UIImagePickerControllerSourceTypeCamera ,//来自相机
     UIImagePickerControllerSourceTypeSavedPhotosAlbum //来自相册
     };
获取图片首先签订两个协议
@interface MainViewController ()
在点击方法内模态推出UIImagePickerController
从相册选取(需给用户选择哪种方式获取图片)
//sourceType 是用来确认用户界面样式,选择相册
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
//设置代理
imagePicker.delegate = self;
//允许编辑弹框
imagePicker.allowsEditing = YES;
//是用手机相册来获取图片的
imagePicker.sourceType = sourceType;      
//模态推出pickViewController
[self presentViewController:imagePicker animated:YES completion:nil];
从相机获取
//sourceType 是用来确认用户界面的样式, 选择相机
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
//设置代理
imagePicker.delegate = self;
//允许编辑弹框
imagePicker.allowsEditing = YES;
//是用相机照相来获取图片
imagePicker.sourceType = sourceType;
//模态推出pickViewController
[self presentViewController:imagePicker animated:YES completion:nil];
实现代理方法
//选择完图片后会回调 didFinishPickingMediaWithInfo 这个方法
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSLog(@"info = %@",info);
//隐藏控制器
  [picker dismissViewControllerAnimated:YES completion:nil];
//给imageView 赋值图片
  imageView.image = [infoobjectForKey:UIImagePickerControllerEditedImage];
}
//导航条上面的 Cancel 的点击方法
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
//隐藏控制器
  [picker dismissViewControllerAnimated:YES completion:nil];
}

来自:http://www.jianshu.com/p/fd4b4407dff0

iOS开发中,我们经常遇到获取拍照、相册中图片的功能,就必然少不了UIImagePickerController,但是我们发现当我们使用它的时候,它的页面是英文的,看着很别扭,国人还是比较喜欢看中文界面,下面来看看我们怎么把它变成中文界面的吧!
只需下面两步就可以了:
Project-->Info-->Localizations 添加 Chinese

UIImagePickerController总结_第1张图片

Mou icon

Target-->Info-->Localization native development region 值修改为 China

UIImagePickerController总结_第2张图片

Mou icon

科普一下:以前xcode3生成的项目,修改Target-->Info-->Localization native development region 的值为China就能显示中文;Xcode4以后修改Target-->Info-->Localization native development region值为China还不够,同时还需要设置Project-->info-->Localizations Language添加Chinese才行。

来自:http://www.jianshu.com/p/6ce6e293b268

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