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小編給大家分享一下iOS開發(fā)如何實現(xiàn)調用系統(tǒng)相機和相冊獲取照片功能,相信大部分人都還不怎么了解,因此分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后大有收獲,下面讓我們一起去了解一下吧!
首先,需要遵循 UIImagePickerController 代理的兩個協(xié)議: <UIImagePickerControllerDelegate, UINavigationControllerDelegate>。為什么是兩個協(xié)議呢?你按著 command 鍵,點擊 UIImagePickerController 的 delegate 就會發(fā)現(xiàn)其實這個代理遵循了兩個協(xié)議。
#import "HeaderPhotoViewController.h" @interface HeaderPhotoViewController () <UIImagePickerControllerDelegate, UINavigationControllerDelegate> @property (nonatomic, strong) UIImageView * imageView; @end @implementation HeaderPhotoViewController - (void)viewDidLoad { [super viewDidLoad]; self.navigationItem.title = @"設置頭像"; 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 { //創(chuàng)建UIImagePickerController對象,并設置代理和可編輯 UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init]; imagePicker.editing = YES; imagePicker.delegate = self; imagePicker.allowsEditing = YES; //創(chuàng)建sheet提示框,提示選擇相機還是相冊 UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"請選擇打開方式" message:nil preferredStyle:UIAlertControllerStyleActionSheet]; //相機選項 UIAlertAction * camera = [UIAlertAction actionWithTitle:@"相機" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { //選擇相機時,設置UIImagePickerController對象相關屬性 imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; imagePicker.modalPresentationStyle = UIModalPresentationFullScreen; imagePicker.mediaTypes = @[(NSString *)kUTTypeImage]; imagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto; //跳轉到UIImagePickerController控制器彈出相機 [self presentViewController:imagePicker animated:YES completion:nil]; }]; //相冊選項 UIAlertAction * photo = [UIAlertAction actionWithTitle:@"相冊" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { //選擇相冊時,設置UIImagePickerController對象相關屬性 imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //跳轉到UIImagePickerController控制器彈出相冊 [self presentViewController:imagePicker animated:YES completion:nil]; }]; //取消按鈕 UIAlertAction * cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) { [self dismissViewControllerAnimated:YES completion:nil]; }]; //添加各個按鈕事件 [alert addAction:camera]; [alert addAction:photo]; [alert addAction:cancel]; //彈出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]; //獲取到的圖片 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的所有代碼都已經(jīng)給大家呈現(xiàn)出來了,最后一步就是配置plist文件,千萬不要忘了這個,要不會崩的。plist文件里邊添加調用相機的字段Privacy - Camera Usage Description 和調用相冊的字段:Privacy - Photo Library Usage Description。萬事俱備,就差一個測試的蘋果手機了,相機的測試需要使用真機測試。
以上是“iOS開發(fā)如何實現(xiàn)調用系統(tǒng)相機和相冊獲取照片功能”這篇文章的所有內(nèi)容,感謝各位的閱讀!相信大家都有了一定的了解,希望分享的內(nèi)容對大家有所幫助,如果還想學習更多知識,歡迎關注億速云行業(yè)資訊頻道!
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