开发了一个程序,从照片数据库中导入相片。在导入的时候占了很多内存,第160个照片的时候系统崩溃了。
不知道是不是内存占用太多引起的。
谢谢
NSDate *date = [NSDate date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc]init];
[dateFormat setDateFormat:@"DD_MM_YY_HH_mm_ss"];
NSString *dateString = [dateFormat stringFromDate:date];
int random=rand();
// create new file names
NSString *fileName=[[NSString alloc] initWithFormat:@"%d%@",random,dateString];
NSString *s_fileName=[[NSString alloc] initWithFormat:@"small_%d%@",random,dateString];
// where to save this image
NSString *imagePath=[self.documentsDirectory stringByAppendingPathComponent:fileName];
NSString *s_imagePath=[self.documentsDirectory stringByAppendingPathComponent:s_fileName];
NSLog(@"type: %@",[rep.url pathExtension]);
if ([[rep.url pathExtension] isEqualToString:@"JPG"]) {
// its jpg
NSData *rawImage=UIImageJPEGRepresentation(image, 1.0);
NSData *thumb=UIImageJPEGRepresentation(newImage, 1.0);
image=nil;
newImage=nil;
date=nil;
dateFormat=nil;
dateString=nil;
random=nil;
// Create the images
[rawImage writeToFile:imagePath atomically:YES];
[thumb writeToFile:s_imagePath atomically:YES];
imagePath=nil;
s_imagePath=nil;
rawImage=nil;
thumb=nil;
}
if ([[rep.url pathExtension] isEqualToString:@"PNG"]) {
// its PNG
// save it in NSData to it can be saved in the directory
NSData *rawImage=UIImagePNGRepresentation(image);
NSData *thumb=UIImagePNGRepresentation(newImage);
image=nil;
newImage=nil;
date=nil;
dateFormat=nil;
dateString=nil;
random=nil;
// Create the images
[rawImage writeToFile:imagePath atomically:YES];
[thumb writeToFile:s_imagePath atomically:YES];
imagePath=nil;
s_imagePath=nil;
rawImage=nil;
thumb=nil;
}
// Now save it to database
[albumObject savePhoto:fileName toFID:PassedID toName:s_fileName albumName:singletonObj.currentAlbum photosName:singletonObj.currentPhotos];
[display_photos addObject:[MWPhoto photoWithFilePath:[self.documentsDirectory stringByAppendingPathComponent:fileName]]];
UIImage *img=[UIImage imageWithContentsOfFile:[self.documentsDirectory stringByAppendingPathComponent:s_fileName]];
[collection_photos addObject:img];
img=nil;
NSArray *pObj=[[NSArray alloc] initWithObjects:fileName,s_fileName, nil];
[photos addObject:pObj];
pObj=nil;
fileName=nil;
s_fileName=nil;
} j=nil;
// Update the album photo count to reflect the changes
[albumObject updateAlbumCount:PassedID photocount:[photos count] albumName:singletonObj.currentAlbum];
photos=[albumObject getPhotos:PassedID photosName:singletonObj.currentPhotos];
// End the loop here ***************************************************************
dispatch_async(dispatch_get_main_queue(), ^{
[self.collectionView reloadData];
[MBProgressHUD hideHUDForView:self.view animated:YES];
[self.navigationItem setHidesBackButton:NO];
[self.navigationItem.rightBarButtonItem setEnabled:YES];
});
});
}