iPhone NSMutableDictionary setObject forKey 在 initWithContentsOfFile 之后
所以这是我的函数
+ (void) AddAddress:(NSString*)ip:(NSString*)mac {
NSMutableDictionary* currentAddresses = [[NSMutableDictionary alloc] initWithContentsOfFile:[self filePath:ADDRESSES_FILE]];
[currentAddresses setObject:mac forKey:ip];
[Configuration Write:currentAddresses];
[currentAddresses release];
}
[self filePath:ADDRESSES_FILE] 返回一个字符串，其中包含位于文档中的文件（ADDRESSES_FILE）的完整路径。该文件可能不存在，在这种情况下，我只想将一个对象写入字典，然后将其写下来，
问题是当我执行 setObject forKey 时，它不会向字典中添加任何内容（如果我只是将 alloc init 分配给字典，它工作正常，但我想从文件中读取记录（如果有的话），并使用 AddAddress 函数替换/添加记录）
so here's my function
+ (void) AddAddress:(NSString*)ip:(NSString*)mac {
NSMutableDictionary* currentAddresses = [[NSMutableDictionary alloc] initWithContentsOfFile:[self filePath:ADDRESSES_FILE]];
[currentAddresses setObject:mac forKey:ip];
[Configuration Write:currentAddresses];
[currentAddresses release];
}
[self filePath:ADDRESSES_FILE] returns a string containing the full path of a file (ADDRESSES_FILE) located in the Documents. The file may not exist, in this case I want to just write an object to the dictionary and then write it down
the problem is that when i do setObject forKey it doesn't add anything to the dict (if i just do alloc init to the dict, it works fine, but i want to read the records from the file, if there are any, and replace/add a record by using the AddAddress function)
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首先，您宁愿尊重 ObjC 的命名约定，以便更容易理解...例如，方法名称以小写字母开头，最好在每个参数的冒号之前放置一个描述性名称，例如方法名称那：
AddAddress::不太好...现在，关于从文件加载字典，问题是如果文件无法加载（不存在，格式错误） ,...)，返回的对象将为 nil，纠正这个问题的最简单方法是输入：
First thing first, you'd rather respect naming convention of ObjC to be more easily understood... For instance, method names start with a small case and it's better to put a descriptive name before the colons for each arguments, a method name like that:
AddAddress::isn't really good...Now, about loading a dictionary from a file, the thing is that if the file can't be loaded (doesn't exist, wrong format,...), the returned object will be nil, the simplest way to correct that is to put: