WriteToFile写入沙盒路径

首先需要创建路径下的文件：

//获取沙盒路径
- (NSString *)getFilePath {
NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];
return [documentsPath stringByAppendingPathComponent:@"sccesss.plist"];
}


然后就可以写入：
if ([JackRenHelpToolsClass isBlankString:tempDic[@"auth"]]) {
[successDic setValue:@"0" forKey:@"auto"];
}else {
[successDic setValue:tempDic[@"auth"] forKey:@"auto"];
}
[successDic writeToFile:[self getFilePath] atomically:YES];
if ([successDic writeToFile:[self getFilePath] atomically:YES]) {
NSLog(@"写入成功");
}else {
NSLog(@"写入失败");
}