I 喜欢从网络路径下载图像。 但是, 由于存在大文件的风险, 我认为直接在文档目录中的文件中写入/ 附加部分NSdata块是一个好主意。 此选项是否可行? 我设置了一个无同步的 URLConnection 。 它会回拨一个代表 < precode> - ( 避免) 连接 : (NSURLonnection *) 连接 ReceiveData: (NSData *) data < p> method。 在这种方法中, 我愿意直接在磁盘中将已下载的“ 数据” 附加到文件 。 您能帮助一点吗? 如果这是不低 C 的空空空, 它将是完美的 。
我从未尝试过,但从这些苹果 docs ,我建议
@property (nonatomic,strong) NSFileHandle *handle;
//somewhere in a init or viewDidLoad
self.handle = [NSFileHandle fileHandleForUpdatingAtPath:filePath]
-(void)connection:(NSURLConnection *)connection
didReceiveData:(NSData *)data
{
[handle seekToEndOfFile];
[handle writeData:data];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[self.handle closeFile];
}
注意: 文件Path 必须是现有文件的有效路径, 有许多处理创建文件的邮件 。
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