【iOS】一个完整的简单的调用系统相机和相册设置头像

1.Xcode8，iOS10的权限设置（不设置会崩溃）：

找到项目的info.plist文件，右键open As,以Source Code的形式打开，将以下代码添加进去：

相机权限设置：

<key>NSCameraUsageDescription</key>
    <string>cameraDesciption</string>

相册权限设置：

<key>NSPhotoLibraryUsageDescription</key>
    <string>photoLibraryDesciption</string>

设置好之后，clean一下。

2.在代码中设置代理

@interface MineCtrl ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>@property(nonatomic,strong)UIImagePickerController *imagePicker;@property(nonatomic,strong)UIImageView *headShot;

3.设置相关属性

    _imagePicker = [[UIImagePickerController alloc]init];    _imagePicker.delegate = self;

    _headShot = [[UIImageView alloc]init];    NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/currentImage.png"];

    _headShot.frame = CGRectMake((SCREEN_WIDTH-80)/2, (SCREEN_HEIGHT/4-80)/2, 80, 80);

<pre name="code" class="objc">   //不设置contentMode，图片会被压扁    _headShot.contentMode = UIViewContentModeScaleAspectFill;    [_headShot setClipsToBounds:YES];    //将选择的图片显示出来    _headShot.image = [UIImage imageWithContentsOfFile:filePath];

    _headShot.backgroundColor = [UIColor grayColor];

    _headShot.layer.masksToBounds = YES;    _headShot.layer.cornerRadius = 40;    _headShot.layer.borderColor = [[UIColor whiteColor]CGColor];

//添加点击手势

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(ClickHandle)];    [tapGesture setNumberOfTapsRequired:1];    [_headShot addGestureRecognizer:tapGesture];

4.设置相关操作：

#pragma mark - 获取头像-(void)ClickHandle{    UIAlertController *AlertSelect = [UIAlertController alertControllerWithTitle:@"提示" message:@"" preferredStyle:UIAlertControllerStyleActionSheet];    UIAlertAction *camera = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {        _imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;        [self presentViewController:_imagePicker animated:YES completion:nil];    }];    UIAlertAction *photo = [UIAlertAction actionWithTitle:@"从手机相册选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {            _imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;        [self presentViewController:_imagePicker animated:YES completion:nil];    }];    UIAlertAction *cancelAction=[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];    [AlertSelect addAction:camera];    [AlertSelect addAction:photo];    [AlertSelect addAction:cancelAction];        [self presentViewController:AlertSelect animated:YES completion:nil];        }- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo{        _headShot.image=image;

<pre name="code" class="objc">//将照片存到媒体库    UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);    [self saveImage:image];

[self dismissViewControllerAnimated:YES completion:nil]; }

4.存储图片到沙盒

#pragma mark - 照片存到本地后的回调- (void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{    if (!error) {        NSLog(@"存储成功");    } else {        NSLog(@"存储失败：%@", error);    }}#pragma mark - 保存图片- (void) saveImage:(UIImage *)currentImage {    //设置照片的品质    NSData *imageData = UIImageJPEGRepresentation(currentImage, 0.5);        NSLog(@"%@",NSHomeDirectory());    // 获取沙盒目录    NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/currentImage.png"];    // 将图片写入文件    [imageData writeToFile:filePath atomically:NO];    }

6.最后的样式，即使退出程序，图片也不会消失。