iOS從手機相簿選擇一張照片並顯示 Objective-C，iosobjective-c

iOS從手機相簿選擇一張照片並顯示 Objective-C，iosobjective-c

 

要先給app設定訪問相簿的許可權：

在項目的Info.plist檔案裡添加Privacy - Photo Library Usage Description許可權

 

ViewController.h：

 1 #import <UIKit/UIKit.h> 2  3 @interface ViewController : UIViewController 4 { 5     IBOutlet UIImageView *myImageView; //與ImageView視圖關聯 6 } 7  8  9 - (IBAction)buttonUp:(id)sender;  // 與一個Button關聯10 11 @end

 

ViewController.m：

 1 #import "ViewController.h" 2  3  4 @interface ViewController ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>//介面 5  6 @end 7  8 @implementation ViewController 9 10 - (void)viewDidLoad {11     [super viewDidLoad];12     // Do any additional setup after loading the view, typically from a nib.13 }14 15 16 - (void)didReceiveMemoryWarning {17     [super didReceiveMemoryWarning];18     // Dispose of any resources that can be recreated.19 }20 21 22 - (IBAction)buttonUp:(id)sender {23     //初始化UIImagePickerController類24     UIImagePickerController * picker = [[UIImagePickerController alloc] init];25     //判斷資料來源為相簿26     picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;27     //設定代理28     picker.delegate = self;29     //開啟相簿30     [self presentViewController:picker animated:YES completion:nil];31 }32 33 //選擇完成回呼函數34 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{35     //擷取圖片36     UIImage *image = info[UIImagePickerControllerOriginalImage];37     [self dismissViewControllerAnimated:YES completion:nil];38 39     myImageView.image = image;40 }41 42 //使用者取消選擇43 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{44     [self dismissViewControllerAnimated:YES completion:nil];45 }46 47 48 @end