iOS 打开系统相册和使用相机

使用相机
添加系统相册照片

ViewController.h

代码：

#import <UIKit/UIKit.h>@interface ViewController : UIViewController<UITextViewDelegate,UIActionSheetDelegate,UINavigationControllerDelegate,UIImagePickerControllerDelegate>{    //输入框    UITextView *_textEditor;    //下拉菜单    UIActionSheet *myActionSheet;    //图片2进制路径    NSString* filePath;}@end

ViewController.m

代码：

#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    UIButton *button = [[UIButton alloc]init];    button.frame = CGRectMake(0, 120, 80, 80);    button.backgroundColor = [UIColor redColor];    [button addTarget:self action:@selector(openMenu) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:button];    float i = [self fileSizeForDir:NSHomeDirectory()];    NSLog(@"%f", i);}-(void)openMenu{    myActionSheet = [[UIActionSheet alloc]                     initWithTitle:nil                     delegate:self                     cancelButtonTitle:@"取消"                     destructiveButtonTitle:nil                     otherButtonTitles: @"打开照相机", @"从手机相册获取",nil];    [myActionSheet showInView:self.view];}- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{    //呼出的菜单按钮点击后的响应    if (buttonIndex == myActionSheet.cancelButtonIndex)    {        NSLog(@"取消");    }    switch (buttonIndex)    {        case 0:  //打开照相机拍照            [self takePhoto];            break;        case 1:  //打开本地相册            [self LocalPhoto];            break;    }}//开始拍照-(void)takePhoto{    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])    {        UIImagePickerController *picker = [[UIImagePickerController alloc] init];        picker.delegate = self;        //设置拍照后的图片可被编辑//        picker.allowsEditing = YES;        picker.sourceType = sourceType;        [self presentModalViewController:picker animated:YES];    }else    {        NSLog(@"模拟其中无法打开照相机,请在真机中使用");    }}//打开本地相册-(void)LocalPhoto{    UIImagePickerController *picker = [[UIImagePickerController alloc] init];    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;    picker.delegate = self;    //设置选择后的图片可被编辑//    picker.allowsEditing = YES;    [self presentModalViewController:picker animated:YES];}//当选择一张图片后进入这里-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{    NSString *type = [info objectForKey:UIImagePickerControllerMediaType];    //当选择的类型是图片    if ([type isEqualToString:@"public.image"])    {        //先把图片转成NSData        UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];        NSData *data;        if (UIImagePNGRepresentation(image) == nil)        {            data = UIImageJPEGRepresentation(image, 1.0);        }        else        {            data = UIImagePNGRepresentation(image);        }        //图片保存的路径        //这里将图片放在沙盒的documents文件夹中        NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];        //文件管理器        NSFileManager *fileManager = [NSFileManager defaultManager];        //把刚刚图片转换的data对象拷贝至沙盒中 并保存为image.png        [fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];        [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];        //得到选择后沙盒中图片的完整路径        filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  @"/image.png"];        //关闭相册界面        [picker dismissModalViewControllerAnimated:YES];        //创建一个选择后图片的小图标放在下方        //类似微薄选择图后的效果        UIImageView *smallimage = [[UIImageView alloc] initWithFrame:                                    CGRectMake(50, 120, 40, 40) ];        smallimage.image = image;        //加在视图中        [self.view addSubview:smallimage];    }}- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{    NSLog(@"您取消了选择图片");    [picker dismissModalViewControllerAnimated:YES];}-(void)sendInfo{    NSLog(@"图片的路径是：%@", filePath);}- (float)fileSizeForDir:(NSString*)path//计算文件夹下文件的总大小{    NSFileManager *fileManager = [[NSFileManager alloc] init];    float size =0;    NSArray* array = [fileManager contentsOfDirectoryAtPath:path error:nil];    for(int i = 0; i<[array count]; i++)    {        NSString *fullPath = [path stringByAppendingPathComponent:[array objectAtIndex:i]];        BOOL isDir;        if ( !([fileManager fileExistsAtPath:fullPath isDirectory:&isDir] && isDir) )        {            NSDictionary *fileAttributeDic=[fileManager attributesOfItemAtPath:fullPath error:nil];            size+= fileAttributeDic.fileSize/ 1024.0/1024.0;        }        else        {            [self fileSizeForDir:fullPath];        }    }    return size;}- (void)viewDidUnload{    [super viewDidUnload];    //  any retained subviews of the main view.}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{    return (interfaceOrientation == UIInterfaceOrientationPortrait);}    // Do any additional setup after loading the view, typically from a nib.- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end