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小编给大家分享一下iOS开发如何实现调用系统相机和相册获取照片功能,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!
首先,需要遵循 UIImagePickerController 代理的两个协议: <UIImagePickerControllerDelegate, UINavigationControllerDelegate>。为什么是两个协议呢?你按着 command 键,点击 UIImagePickerController 的 delegate 就会发现其实这个代理遵循了两个协议。
#import "HeaderPhotoViewController.h" @interface HeaderPhotoViewController () <UIImagePickerControllerDelegate, UINavigationControllerDelegate> @property (nonatomic, strong) UIImageView * imageView; @end @implementation HeaderPhotoViewController - (void)viewDidLoad { [super viewDidLoad]; self.navigationItem.title = @"设置头像"; self.view.backgroundColor = [UIColor whiteColor]; [self setNavigation]; [self addSubviews]; [self makeConstraintsForUI]; } #pragma mark - set navigation - (void)setNavigation { self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(selectPhoto:)]; } #pragma mark - navitation item action - (void)selectPhoto:(UIBarButtonItem *)itemCamera { //创建UIImagePickerController对象,并设置代理和可编辑 UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init]; imagePicker.editing = YES; imagePicker.delegate = self; imagePicker.allowsEditing = YES; //创建sheet提示框,提示选择相机还是相册 UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"请选择打开方式" message:nil preferredStyle:UIAlertControllerStyleActionSheet]; //相机选项 UIAlertAction * camera = [UIAlertAction actionWithTitle:@"相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { //选择相机时,设置UIImagePickerController对象相关属性 imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; imagePicker.modalPresentationStyle = UIModalPresentationFullScreen; imagePicker.mediaTypes = @[(NSString *)kUTTypeImage]; imagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto; //跳转到UIImagePickerController控制器弹出相机 [self presentViewController:imagePicker animated:YES completion:nil]; }]; //相册选项 UIAlertAction * photo = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { //选择相册时,设置UIImagePickerController对象相关属性 imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //跳转到UIImagePickerController控制器弹出相册 [self presentViewController:imagePicker animated:YES completion:nil]; }]; //取消按钮 UIAlertAction * cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) { [self dismissViewControllerAnimated:YES completion:nil]; }]; //添加各个按钮事件 [alert addAction:camera]; [alert addAction:photo]; [alert addAction:cancel]; //弹出sheet提示框 [self presentViewController:alert animated:YES completion:nil]; } #pragma mark - add subviews - (void)addSubviews { [self.view addSubview:self.imageView]; } #pragma mark - make constraints - (void)makeConstraintsForUI { __weak typeof(self)weakSelf = self; [_imageView mas_makeConstraints:^(MASConstraintMaker *make) { make.size.mas_equalTo(CGSizeMake(Screen_Width, Screen_Width)); make.centerX.mas_equalTo(weakSelf.view.mas_centerX); make.centerY.mas_equalTo(weakSelf.view.mas_centerY); }]; } #pragma mark - imagePickerController delegate - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info { [picker dismissViewControllerAnimated:YES completion:nil]; //获取到的图片 UIImage * image = [info valueForKey:UIImagePickerControllerEditedImage]; _imageView.image = image; } #pragma mark - setter and getter - (UIImageView *)imageView { if (!_imageView) { _imageView = [[UIImageView alloc] init]; _imageView.backgroundColor = [UIColor greenColor]; _imageView.contentMode = UIViewContentModeScaleAspectFill; } return _imageView; } @end
OK!demo的所有代码都已经给大家呈现出来了,最后一步就是配置plist文件,千万不要忘了这个,要不会崩的。plist文件里边添加调用相机的字段Privacy - Camera Usage Description 和调用相册的字段:Privacy - Photo Library Usage Description。万事俱备,就差一个测试的苹果手机了,相机的测试需要使用真机测试。
以上是“iOS开发如何实现调用系统相机和相册获取照片功能”这篇文章的所有内容,感谢各位的阅读!相信大家都有了一定的了解,希望分享的内容对大家有所帮助,如果还想学习更多知识,欢迎关注亿速云行业资讯频道!
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