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我面臨的問題與ALAsset庫:我有一個UIView 100圖像視圖。當視圖加載時,我正在調用一個用於從文件名生成圖像的函數。問題與AlAsset庫
這是我的課:
@interface myClass
{
NSString *fileName;
int pathId;
}
viewDidLoad中
-(void)viewDidLoad
{
NSMutableArray *imageCollectionArray = [self createImage:arrayOfmyClassObject];
//Here I'm binding the 100 images in UIView using the images in imageCollectionArray
}
這是我的方法,我發現了問題:
- (NSMutableArray *)createImage:(NSMutableArray *)imageFileNamesArray
{
imageArray = [[NSMutableArray alloc] init];
for (int imageNameKey = 0; imageNameKey<100; imageNameKey++)
{
myClass *obj= [imageFileNamesArray objectAtIndex:imageNameKey];
if(obj.pathId == 0)
{
//Here adding the bundle image into the imageArray
[imageArray addObject:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:obj.fileName ofType:@"png" inDirectory:@"Images"]]];
}
else
{
typedef void (^ALAssetsLibraryAssetForURLResultBlock)(ALAsset *asset); typedef void (^ALAssetsLibraryAccessFailureBlock)(NSError *error);
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset) {
};
ALAssetRepresentation *rep = [myasset defaultRepresentation];
CGImageRef iref = [rep fullResolutionImage];
UIImage *images;
if (iref)
{
//Here adding the photo library image into the imageArray
images = [UIImage imageWithCGImage:iref];
[imageArray addObject:images];
}
else
{
//Here adding the Nofile.png image into the imageArray if didn't find a photo library image
images = [UIImage imageNamed:@"Nofile.png"];
[imageArray addObject:images];
}
ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror) {
//Here adding the Nofile.png image into the imageArray if any failure occurs
[imageArray addObject:[UIImage imageNamed:@"Nofile.png"]];
NSLog(@"booya, cant get image - %@",[myerror localizedDescription]);
};
NSURL *asseturl = [NSURL URLWithString:obj.fileName];
ALAssetsLibrary* assetslibrary = [[[ALAssetsLibrary alloc] init] autorelease];
[assetslibrary assetForURL:asseturl
resultBlock:resultblock failureBlock:failureblock];
}
}
return imageArray;
}
的問題是,當我負載第一次查看資產庫圖片不會生成,只顯示包圖像,如果我轉到任何其他視圖並返回到100圖像視圖,則生成資產圖像。並且工作正常。問題是相同的功能在第一次加載時不會生成資產映像。我怎樣才能解決這個問題?提前致謝。
我不相信這段代碼可以編譯。 – jamapag
無法理解您的代碼。隨處可見括號。 – memmons
奇怪的代碼...不要忘了ALAsset是異步的,也許你需要在加載所有圖像時執行setNeedsDisplay – Johnmph