从iPhone的文档目录加载图像

Question

我想从我的应用程序文档库中加载图像到UIImageView。我试图使用下面的代码，但它不工作。

UIImageView *background = [[[UIImageView alloc] initWithFrame:CGRectMake(3, 10, 48, 36)] autorelease]; 

[background setImage:[[UIImage imageAtPath:[[NSBundle mainBundle] pathForResource:@"Thumbnail-small" ofType:@"jpg" inDirectory:@"/Users/nbojja/Library/Application Support/iPhone Simulator/User/Applications/60C2E4EC-2FE0-4579-9F86-08CCF078216D/Documents/eb43ac64-8807-4250-8349-4b1f5ddd7d0d/9286371c-564f-40b4-99bd-a2aceb00a6d3/9"]]] retain]]; 

有人可以帮助我这样做。谢谢...

Answer 1

见this related question其中有你想要的代码。

Answer 2

我想你实际上需要的是：

UIImage *img = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"myimagefile" ofType:@"png"]]; 
[self.testView.imgView setImage:img]; 

Answer 3

使用[UIImage imageNamed:@"ThumbnailSmall.jpg"];

这将加载你想要什么，我认为。

Answer 4

如果你真的要加载从您的应用程序的文档文件夹中的图片，你可以这样做：

NSArray *sysPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *docDirectory = [sysPaths objectAtIndex:0]; 
NSString *filePath = [NSString stringWithFormat:@"%@/Thumbnail-small.jpg", docDirectory]; 
background.image = [[[UIImage alloc] initWithContentsOfFile:filePath] autorelease]; 

然而，正如其他人在这里指出的那样，你可能想从您的应用程序加载束，在这种情况下，或者这些将工作：

background.image = [UIImage imageNamed:@"Thumbnail-small.jpg"]; 

或

NSString *path = [[NSBundle mainBundle] pathForResource:@"Thumbnail-small" ofType:@"jpg"]; 
background.image = [UIImage imageWithContentsOfFile:path]; 

Answer 5

NSString *docPath = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0]; 
NSString *filePath=[NSString stringWithFormat:@"%@/image.png",docPath]; 

BOOL fileExists=[[NSFileManager defaultManager] fileExistsAtPath:filePath]; 

if (!fileExists) 
    NSLog(@"File Not Found"); 
else 
    image = [UIImage imageWithContentsOfFile:filePath]; 

Answer 6

斯威夫特3：

let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory 
let nsUserDomainMask = FileManager.SearchPathDomainMask.userDomainMask 
let paths = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true) 
if let dirPath = paths.first { 
let imageURL = URL(fileURLWithPath: dirPath).appendingPathComponent("Image2.png") 
let image = UIImage(contentsOfFile: imageURL.path) 
// Do whatever you want with the image 
}