Question

I used the codes below to load image

NSURL *url=[NSURL URLWithString:[NSString stringWithFormat:@"file://home/%@", filename]]; 
NSImage *image = [[[NSImage alloc] initWithContentsOfURL:url] autorelease];

but I found that if there is a space in the filename, such as

@”a b.jpg”

image returns 0x0

Welcome any comment

Answer 1

When creating URLs pointing to file system paths, one should use +fileURLWithPath: or -initFileURLWithPath:. Replace:

NSURL *url=[NSURL URLWithString:[NSString stringWithFormat:@"file://home/%@", filename]];

with:

NSURL *url=[NSURL fileURLWithPath:[NSString stringWithFormat:@"/home/%@", filename]];

And, in general, one should use -[NSString stringByAppendingPathComponent] when composing strings that represent paths. This method takes care of placing a solidus / when appropriate:

NSString *fullPath = [[@"/home" stringByAppendingPathComponent:filename] autorelease];
NSURL *url = [NSURL fileURLWithPath:fullPath];