将NSString类型写入文件 [英] writing NSString type to a file

问题描述

我在 appdelegate ，

上实现以下函数，但我需要写 NSString 类型而不是典型的浮点值。

因为xcode不允许对象在我想要的位置，

我使用 char * 而不是如下，其中要传递的数据类型为 NSString 。

，它不工作...

我如何操作它，以便我可以写 NSString 数据类型？

我应该进行一些转换吗？

请帮助我。

I'm implementing the following function on appdelegate,
but I need to write NSString type instead of typical float values.
Since xcode doesn't allow an object to be in my desired position,
I used char* instead as follows, where as my data to be passed are of type NSString.
As expected, it doesn't work...
How could I manipulate it so that I could write NSString data type?
Should I make some conversion?
Please help me out..

- (void)addHallOfFamer:(char*)newHofer{
    [hofArray addObject:[NSString stringWithFormat:@"%@",newHofer]];
    [hofArray sortUsingSelector:@selector(compare:)];
    NSArray* paths =
    NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString* documentsDirectory = [paths objectAtIndex:0];
    NSString* hofArrayPath = [documentsDirectory
                          stringByAppendingPathComponent:@"hofers.plist"];
    [hofArray writeToFile:hofArrayPath atomically:YES];
}

（已添加）
下面是我如何调用NSStrings从另一个视图，这不反映我的更新。

(added) following is how I'm calling the written NSStrings from another view, which doesn't reflect my updating.

MainAppDelegate* delegate;
delegate = (MainAppDelegate*)[[UIApplication sharedApplication] delegate];
NSArray *hofers = [[delegate.hofArray reverseObjectEnumerator] allObjects];
hoferName1.text = [NSString stringWithFormat:@"%@",[hofers objectAtIndex:0]];

推荐答案

char * 参数，您需要使用％s作为格式指令，而不是％@。

First, with the current char * argument, you need to use %s as your format directive, not %@.

其次，使用 NSString * 作为参数，只需将它添加到hofArray。

Second, to use an NSString * as your argument, just add it to hofArray.

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