我正在使用此代码来回忆我为每种类型创建的目录。但是，我在“[arrayCollectionImages addObject:image];你能解释一下最后一段代码有什么问题”的图像部分出现错误。我在 arrayCollectionImages 也有一个警告，说 arrayCollectionImages 的本地声明隐藏实例变量。它还告诉我 [[cell collectionImageView]setImage:[UIImage imageNamed:[arrayCollectionImages objectAtindex:indexPath.item]]];“NSArray”的 No visible @interface 声明了选择器“objectAtindex:;” 我做错了什么？
#import "CollectionViewController.h"
#import "CollectionCell.h"
@interface CollectionViewController (){
NSArray *arrayCollectionImages;
}
@end
@implementation CollectionViewController
- (void)viewDidLoad {
NSArray *allImagesArray = [[NSArray alloc ]init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *location=@"Genre1";
NSString *fPath = [documentsDirectory stringByAppendingPathComponent:location];
NSArray *directoryContent = [[NSFileManager defaultManager] directoryContentsAtPath: fPath];
for(NSString *str in directoryContent){
NSString *finalFilePath = [fPath stringByAppendingPathComponent:str];
NSData *data = [NSData dataWithContentsOfFile:finalFilePath];
if(data)
{
UIImage *image = [UIImage imageWithData:data];
[allImagesArray addObject:image];
}
}
[super viewDidLoad];
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
CollectionCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ReuseID" forIndexPath:indexPath];
[[cell collectionImageView]setImage:[UIImage imageNamed:[arrayCollectionImages objectAtIndex:indexPath.item]]];
return cell;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return [arrayCollectionImages count];
}
@end
这是我保存到目录的代码
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
FrontCamera = NO;
cameraSwitch.selectedSegmentIndex = 1;
captureImage.hidden = YES;
[pickerViewContainer addSubview:SaveTopicker];
arraygenre = [[NSMutableArray alloc] init];
[arraygenre addObject:@"Tops"];
[arraygenre addObject:@"Pants"];
[arraygenre addObject:@"Coats"];
[arraygenre addObject:@"Shoes"];
[arraygenre addObject:@"Hats"];
[arraygenre addObject:@"Others"];
pickerViewContainer.frame = CGRectMake(0, 800, 320, 261);
}
- (void)viewDidAppear:(BOOL)animated {
[self initializeCamera];
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//fetch Category Name from the array used to fill the Picker View
NSString *categoryName= [arraygenre objectAtIndex:row];
NSString *fPath = [documentsDirectory stringByAppendingPathComponent:categoryName];
NSFileManager *fileManager=[[NSFileManager alloc]init];
[fileManager createDirectoryAtPath:fPath withIntermediateDirectories:YES attributes:nil error:nil];
UIImage *image = captureImage.image;
NSData *data = UIImagePNGRepresentation(image);
[data writeToFile:fPath atomically:YES];
}