在vc中
先引入一个头文件, 用于ios9下判断是否有访问系统相册权限
#import <Photos/Photos.h>
先签这俩协议
@interface NAMinePicModifyViewController ()< UIImagePickerControllerDelegate, UINavigationControllerDelegate>
写个属性
@property (nonatomic, strong) UIImagePickerController *imagePickerController;
写个懒加载, 避免重复创建
- (UIImagePickerController *)imagePickerController{
if (!_imagePickerController) {
_imagePickerController = [[UIImagePickerController alloc] init];
_imagePickerController.delegate = self;
//模态推出照相机页面的样式
_imagePickerController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
_imagePickerController.allowsEditing = YES;
}
return _imagePickerController;
}
在一个拍照触发按钮点击事件, cell点击事件也行,
#pragma mark - 选择拍照
- (void)selectImageFromCamera{
//判断相机是否可用
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
//判断是否开启相机权限
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
//权限未开启
if (authStatus == AVAuthorizationStatusRestricted || authStatus == AVAuthorizationStatusDenied)
{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"抱歉" message:@"您尚未开启相机权限" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *actionOK = [UIAlertAction actionWithTitle:@"去开启" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
//info plist中URL type中添加一个URL Schemes添加一个prefs值
if([[UIApplication sharedApplication] canOpenURL:url]){
//跳转到隐私
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=Privacy&path=CAMERA"]];
}
}];
UIAlertAction *actionCancel = [UIAlertAction actionWithTitle:@"不了" style:UIAlertActionStyleDefault handler:nil];
[alertController addAction:actionOK];
[alertController addAction:actionCancel];
[self presentViewController:alertController animated:YES completion:nil];
}
//权限已开启
else{
self.imagePickerController.delegate = self;
self.imagePickerController.allowsEditing = YES;
self.imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:self.imagePickerController animated:YES completion:^{}];
}
}
//适用于没有相机的设备
else{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"抱歉" message:@"相机不可用" preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:alertController animated:YES completion:nil];
#pragma mark - 让alert自动消失
[NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(creatAlert:) userInfo:alertController repeats:NO];
}
}
#pragma mark - 让警告消失
- (void)creatAlert:(NSTimer *)timer{
UIAlertController *alert = [timer userInfo];
[alert dismissViewControllerAnimated:YES completion:nil];
alert = nil;
}
#pragma mark - ImagePicker delegate
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
[picker dismissViewControllerAnimated:YES completion:^{
}];
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
/* 此处info 有六个值
* UIImagePickerControllerMediaType; // an NSString UTTypeImage)
* UIImagePickerControllerOriginalImage; // a UIImage 原始图片
* UIImagePickerControllerEditedImage; // a UIImage 裁剪后图片
* UIImagePickerControllerCropRect; // an NSValue (CGRect)
* UIImagePickerControllerMediaURL; // an NSURL
* UIImagePickerControllerReferenceURL // an NSURL that references an asset in the AssetsLibrary framework
* UIImagePickerControllerMediaMetadata // an NSDictionary containing metadata from a captured photo
*/
//保存图片至本地
[self saveImage:image withName:@"currentImage.png"];
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"currentImage.png"];
UIImage *savedImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
//这个本来是想用于拍照后编辑的, 发现并没有用
//self.isFullScreen = NO;
//用拍下来的照片赋值
[_headerView.buttonOfIcon setImage:savedImage forState:UIControlStateNormal];
//访问相册权限, ios9之后的api, 要引入<Photos/Photos.h>
PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
//相册权限已开启
if(status == PHAuthorizationStatusAuthorized){
//存入本地相册
UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
//未开启相册权限
//PHAuthorizationStatusNotDetermined,
//PHAuthorizationStatusRestricted
//PHAuthorizationStatusDenied
else{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"您尚未开启相册权限" message:@"无法存入所拍的照片" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *actionOK = [UIAlertAction actionWithTitle:@"去开启" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
//info plist中URL type中添加一个URL Schemes添加一个prefs值
if([[UIApplication sharedApplication] canOpenURL:url]){
//跳转到隐私
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=Privacy&path=PHOTOS"]];
}
}];
UIAlertAction *actionCancel = [UIAlertAction actionWithTitle:@"不了" style:UIAlertActionStyleDefault handler:nil];
[alertController addAction:actionOK];
[alertController addAction:actionCancel];
[self presentViewController:alertController animated:YES completion:nil];
}
}
#pragma mark - 存储到系统相册结果回调
- (void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo
{
if (error)
{
NSLog(@"%@", error);
}
else
{
NSLog(@"保存成功");
}
}
#pragma mark - 保存图片至沙盒
- (void)saveImage:(UIImage *)currentImage withName:(NSString *)imageName{
if (UIImagePNGRepresentation(currentImage)) {
data = UIImagePNGRepresentation(currentImage);
}else{
data = UIImageJPEGRepresentation(currentImage, 1.0);
}
//获取沙盒目录
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:imageName];
//将图片写入文件
//atomically：这个参数意思是如果为YES则保证文件的写入原子性,就是说会先创建一个临时文件,直到文件内容写入成功再导入到目标文件里.如果为NO,则直接写入目标文件里
[data writeToFile:fullPath atomically:NO];
}
在视图类中, 对每次程序启动进行判断
#pragma mark - 确保每次运行都是上次修改后的照片
//读取图片
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"currentImage.png"];
UIImage *savedImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
//本地有的话直接读取沙盒本地
if (savedImage) {
[_buttonOfIcon setImage:savedImage forState:UIControlStateNormal];
}
//没有的话是默认初始图片
else{
[_buttonOfIcon setImage:[UIImage imageNamed:@"sendPhoto"] forState:UIControlStateNormal];
}
调用系统相册、相机发现是英文的系统相簿界面后标题显示“photos”，但是手机语言已经设置显示中文，纠结半天，最终在info.plist设置解决问题
info.plist里面添加Localized resources can be mixed YES
表示是否允许应用程序获取框架库内语言。
最后 感谢http://my.oschina.net/joanfen/blog/134677
--------------------我是分割线----------------------------------
此处感谢http://www.xuanyusong.com/archives/1493
接下来说打开本地相册选取图片
pragma mark - 选择打开本地图库
- (void)openLocalAlbum{
self.imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
self.imagePickerController.delegate = self;
//设置选择后的图片可被编辑
self.imagePickerController.allowsEditing = YES;
[self presentViewController:self.imagePickerController animated:YES completion:^{}];
}
再配合之前写的
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
方法即可, 如果已经写了, 则不用再写一遍, 也不用分开判断
