iPhone - 来自本地文件URL的NSData

Question

我有一个NSURL对象,它给我一个本地文件的路径(在文档文件夹中).我想NSData用这个文件的内容填充一个对象.尝试使用,dataWithContentsOfURL:但这失败了.我知道该文件存在,因为iPhone SDK返回路径.

有人可以告诉我如何NSData从URL本地文件中获取对象吗？

谢谢.

Answer 1

// Given some file path URL: NSURL *pathURL
// Note: [pathURL isFileURL] must return YES
NSString *path = [pathURL path];
NSData *data = [[NSFileManager defaultManager] contentsAtPath:path];

Answer 2

要完成这项工作,您只需要:

NSURL *imgPath = [[NSBundle mainBundle] URLForResource:@"search" withExtension:@"png"];
NSString*stringPath = [imgPath absoluteString]; //this is correct  

//you can again use it in NSURL eg if you have async loading images and your mechanism 
//uses only url like mine (but sometimes i need local files to load)
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:stringPath]];
UIImage *ready = [[[UIImage alloc] initWithData:data] autorelease];