在vc中
先引入一個(gè)頭文件, 用于ios9下判斷是否有訪問系統(tǒng)相冊(cè)權(quán)限
#import <Photos/Photos.h>
先簽這倆協(xié)議
@interface NAMinePicModifyViewController ()< UIImagePickerControllerDelegate, UINavigationControllerDelegate>
寫個(gè)屬性
@property (nonatomic, strong) UIImagePickerController *imagePickerController;
寫個(gè)懶加載, 避免重復(fù)創(chuàng)建
- (UIImagePickerController *)imagePickerController{
if (!_imagePickerController) {
_imagePickerController = [[UIImagePickerController alloc] init];
_imagePickerController.delegate = self;
//模態(tài)推出照相機(jī)頁面的樣式
_imagePickerController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
_imagePickerController.allowsEditing = YES;
}
return _imagePickerController;
}
在一個(gè)拍照觸發(fā)按鈕點(diǎn)擊事件, cell點(diǎn)擊事件也行,
#pragma mark - 選擇拍照
- (void)selectImageFromCamera{
//判斷相機(jī)是否可用
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
//判斷是否開啟相機(jī)權(quán)限
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
//權(quán)限未開啟
if (authStatus == AVAuthorizationStatusRestricted || authStatus == AVAuthorizationStatusDenied)
{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"抱歉" message:@"您尚未開啟相機(jī)權(quán)限" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *actionOK = [UIAlertAction actionWithTitle:@"去開啟" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
//info plist中URL type中添加一個(gè)URL Schemes添加一個(gè)prefs值
if([[UIApplication sharedApplication] canOpenURL:url]){
//跳轉(zhuǎn)到隱私
[[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];
}
//權(quán)限已開啟
else{
self.imagePickerController.delegate = self;
self.imagePickerController.allowsEditing = YES;
self.imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:self.imagePickerController animated:YES completion:^{}];
}
}
//適用于沒有相機(jī)的設(shè)備
else{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"抱歉" message:@"相機(jī)不可用" preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:alertController animated:YES completion:nil];
#pragma mark - 讓alert自動(dòng)消失
[NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(creatAlert:) userInfo:alertController repeats:NO];
}
}
#pragma mark - 讓警告消失
- (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];
/* 此處info 有六個(gè)值
* UIImagePickerControllerMediaType; // an NSString UTTypeImage)
* UIImagePickerControllerOriginalImage; // a UIImage 原始圖片
* UIImagePickerControllerEditedImage; // a UIImage 裁剪后圖片
* 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
*/
//保存圖片至本地
[self saveImage:image withName:@"currentImage.png"];
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"currentImage.png"];
UIImage *savedImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
//這個(gè)本來是想用于拍照后編輯的, 發(fā)現(xiàn)并沒有用
//self.isFullScreen = NO;
//用拍下來的照片賦值
[_headerView.buttonOfIcon setImage:savedImage forState:UIControlStateNormal];
//訪問相冊(cè)權(quán)限, ios9之后的api, 要引入<Photos/Photos.h>
PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
//相冊(cè)權(quán)限已開啟
if(status == PHAuthorizationStatusAuthorized){
//存入本地相冊(cè)
UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
//未開啟相冊(cè)權(quán)限
//PHAuthorizationStatusNotDetermined,
//PHAuthorizationStatusRestricted
//PHAuthorizationStatusDenied
else{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"您尚未開啟相冊(cè)權(quán)限" message:@"無法存入所拍的照片" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *actionOK = [UIAlertAction actionWithTitle:@"去開啟" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
//info plist中URL type中添加一個(gè)URL Schemes添加一個(gè)prefs值
if([[UIApplication sharedApplication] canOpenURL:url]){
//跳轉(zhuǎn)到隱私
[[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 - 存儲(chǔ)到系統(tǒng)相冊(cè)結(jié)果回調(diào)
- (void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo
{
if (error)
{
NSLog(@"%@", error);
}
else
{
NSLog(@"保存成功");
}
}
#pragma mark - 保存圖片至沙盒
- (void)saveImage:(UIImage *)currentImage withName:(NSString *)imageName{
if (UIImagePNGRepresentation(currentImage)) {
data = UIImagePNGRepresentation(currentImage);
}else{
data = UIImageJPEGRepresentation(currentImage, 1.0);
}
//獲取沙盒目錄
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:imageName];
//將圖片寫入文件
//atomically：這個(gè)參數(shù)意思是如果為YES則保證文件的寫入原子性,就是說會(huì)先創(chuàng)建一個(gè)臨時(shí)文件,直到文件內(nèi)容寫入成功再導(dǎo)入到目標(biāo)文件里.如果為NO,則直接寫入目標(biāo)文件里
[data writeToFile:fullPath atomically:NO];
}
在視圖類中, 對(duì)每次程序啟動(dòng)進(jìn)行判斷
#pragma mark - 確保每次運(yùn)行都是上次修改后的照片
//讀取圖片
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"currentImage.png"];
UIImage *savedImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
//本地有的話直接讀取沙盒本地
if (savedImage) {
[_buttonOfIcon setImage:savedImage forState:UIControlStateNormal];
}
//沒有的話是默認(rèn)初始圖片
else{
[_buttonOfIcon setImage:[UIImage imageNamed:@"sendPhoto"] forState:UIControlStateNormal];
}
調(diào)用系統(tǒng)相冊(cè)、相機(jī)發(fā)現(xiàn)是英文的系統(tǒng)相簿界面后標(biāo)題顯示“photos”最疆，但是手機(jī)語言已經(jīng)設(shè)置顯示中文，糾結(jié)半天服爷，最終在info.plist設(shè)置解決問題
info.plist里面添加Localized resources can be mixed YES
表示是否允許應(yīng)用程序獲取框架庫內(nèi)語言。
最后 感謝http://my.oschina.net/joanfen/blog/134677
--------------------我是分割線----------------------------------
此處感謝http://www.xuanyusong.com/archives/1493
接下來說打開本地相冊(cè)選取圖片
pragma mark - 選擇打開本地圖庫
- (void)openLocalAlbum{
self.imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
self.imagePickerController.delegate = self;
//設(shè)置選擇后的圖片可被編輯
self.imagePickerController.allowsEditing = YES;
[self presentViewController:self.imagePickerController animated:YES completion:^{}];
}
再配合之前寫的
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
方法即可, 如果已經(jīng)寫了, 則不用再寫一遍, 也不用分開判斷
