IOS 从系统图库中获取 图片 并设置为头像

总会遇到一些应用 要拍照 设置图片之类的的  总结一个方法备用  以后 会 继续拓展到 多图

@interface AddCustomerViewController : UIViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
{
    UIImage *chosenImage;//做显示在self.view 上的image
    NSString *tempImagePath;//图片路径
    UIButton *button_Photo;//点击从系统选图片
}
@end
//以上代理 和参数 都是必须有的

-(void)TakePhoto
{
    UIActionSheet *actionSheet =[[UIActionSheet alloc]initWithTitle:@"您想如何获取照片?" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照", nil];
   [actionSheet showInView:self.view];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    /*
    NSLog(@"%ld",(long)buttonIndex);//2--->取消
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    if(buttonIndex==0)
    {//拍照
        picker.sourceType=UIImagePickerControllerSourceTypeCamera;
    }
    else if(buttonIndex==1)
    {//图库
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }
    [self presentViewController:picker animated:YES completion:NULL];
     */
    NSLog(@"%ld",(long)buttonIndex);//2--->取消

    if(buttonIndex==)
    {//拍照
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType=UIImagePickerControllerSourceTypeCamera;
        [self presentViewController:picker animated:YES completion:NULL];
    }

}

#pragma -mark UIImagePickerController delegate
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    chosenImage = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    //删除缓存文件
    if ([[NSFileManager defaultManager] fileExistsAtPath:tempImagePath]) {
        NSLog(@"the image is exist");
        NSFileManager *defaultManager;

        defaultManager = [NSFileManager defaultManager];
        NSError *error = [[NSError alloc] init];
        [defaultManager removeItemAtPath:tempImagePath error:&error];

    }
    [UIImagePNGRepresentation(chosenImage) writeToFile:[ NSTemporaryDirectory() stringByAppendingPathComponent:@"temp_image.png"] atomically:YES];

    BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:tempImagePath];

    if (fileExists) {
        NSLog(@"success");
        customer_Inform.image_Head=chosenImage;
        [button_Photo setImage:chosenImage forState:UIControlStateNormal];

    }
    [picker dismissViewControllerAnimated:YES completion:NULL];

    if (fileExists) {
        NSLog(@"success");
        [SGInfoAlert showInfo:@" 照片添加成功! "
                      bgColor:[[UIColor darkGrayColor] CGColor]
                       inView:self.view
                     vertical:0.5];
    }
    else
    {
        [SGInfoAlert showInfo:@" 照片添加不成功! "
                      bgColor:[[UIColor darkGrayColor] CGColor]
                       inView:self.view
                     vertical:0.5];
    }
//    //也能用
//    [button_Photo setImage:[info objectForKey:@"UIImagePickerControllerOriginalImage"] forState:UIControlStateNormal];
//    [picker dismissViewControllerAnimated:YES completion:NULL];
}