1.新建viewController 拖入一个Button,添加点击事件，使用代理方法
<UIActionSheetDelegate,UIImagePickerControllerDelegate>
2.代码如下- (IBAction)DoChoose:(id)sender {
UIActionSheet *sheet;
//检查是否有摄像头功能
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { sheet = [[UIActionSheet alloc]
initWithTitle:@"选择"
delegate:self
cancelButtonTitle:nil
destructiveButtonTitle:@"取消"
otherButtonTitles:@"拍照",@"从相册选择", nil];
}
else
{
sheet = [[UIActionSheet alloc]
initWithTitle:@"选择"
delegate:self
cancelButtonTitle:nil
destructiveButtonTitle:@"取消"
otherButtonTitles:@"从相册选择", nil];
}
sheet.tag=;
[sheet showInView:self.view];
}
//代理方法，启用拍照或使用相册功能
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (actionSheet.tag == ) {
NSUInteger sourceType = ;
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
switch (buttonIndex) {
case :
return;
case :
sourceType = UIImagePickerControllerSourceTypeCamera;
break;
case :
sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
break;
default:
break;
}
}
else
{
if (buttonIndex ==) {
return;
}
else
{
sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
}
} UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init]; imagePickerController.delegate = self; imagePickerController.allowsEditing = YES; imagePickerController.sourceType = sourceType; [self presentViewController:imagePickerController animated:YES completion:^{}];
}
}
//返回的图片数据
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
//返回到主界面中
[picker dismissViewControllerAnimated:YES completion:^{}];
//获取返回的图片
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
//压缩图片
NSData *imageData = UIImageJPEGRepresentation(image, 0.5);
//沙盒，准备保存的图片地址和图片名称
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"x.jpg"];
//将图片写入文件中
[imageData writeToFile:fullPath atomically:NO];
//通过路径获取到保存的图片，可以在主界面上的image进行预览
UIImage *saveImage = [[UIImage alloc]initWithContentsOfFile:fullPath]; [self.img1 setImage:saveImage]; //将图片变为Base64格式，可以将数据通过接口传给后台
NSData *data = UIImageJPEGRepresentation(saveImage, 1.0f);
NSString *baseString = [data base64Encoding];
}
//关闭拍照窗口
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissViewControllerAnimated:YES completion:^{}];
}