文件名最大长度
我使用下面的代码将图像保存在 NSDocumentDirectory 中，
-(BOOL)saveImage:(UIImage *)image name:(NSString *)name{
NSString *dir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *path = [NSString pathWithComponents:[NSArray arrayWithObjects:dir, name, nil]];
BOOL ok = [[NSFileManager defaultManager] createFileAtPath:path contents:nil attributes:nil];
if (!ok) {
NSLog(@"Error creating file %@", path);
}
else {
NSFileHandle* myFileHandle = [NSFileHandle fileHandleForWritingAtPath:path];
[myFileHandle writeData:UIImagePNGRepresentation(image)];
[myFileHandle closeFile];
}
return ok;
}
名称通常是图像下载位置的 url。
文件名长度有限制吗？你知道有时网址可能会很长...
谢谢
i am using the code below to save an image in the NSDocumentDirectory
-(BOOL)saveImage:(UIImage *)image name:(NSString *)name{
NSString *dir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *path = [NSString pathWithComponents:[NSArray arrayWithObjects:dir, name, nil]];
BOOL ok = [[NSFileManager defaultManager] createFileAtPath:path contents:nil attributes:nil];
if (!ok) {
NSLog(@"Error creating file %@", path);
}
else {
NSFileHandle* myFileHandle = [NSFileHandle fileHandleForWritingAtPath:path];
[myFileHandle writeData:UIImagePNGRepresentation(image)];
[myFileHandle closeFile];
}
return ok;
}
the name is usually the url of where the image was downloaded.
is there a constraint on the length of the file name? you know sometimes urls may be super long...
thank you
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查看 syslimits.h:91 中的 PATH_MAX 常量，
您可以通过执行以下操作自行测试：
只是为了确定。
Taking a look at the PATH_MAX constant in syslimits.h:91
You can test this yourself by doing :
just to make sure.