ios 怎么把data写入文件
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1：//获取文件路径
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"fileName"];
2：//待写入的数据
NSString *temp = @”Welcome to blog.iosxcode4.com”;
int data0 = 100000;
float data1 = 23.45f;
3：//创建数据缓冲
NSMutableData *writer = [[NSMutableData alloc] init];
4：//将字符串添加到缓冲中
[writer appendData:[temp dataUsingEncoding:NSUTF8StringEncoding]];
5：//将其他数据添加到缓冲中
[writer appendBytes:&data0 length:sizeof(data0)];
[writer appendBytes:&data1 length:sizeof(data1)];
6：//将缓冲的数据写入到文件中
[writer writeToFile:path atomically:YES];
[writer release];
