写/读plist文件iPhone [英] Write/Read plist file iPhone

问题描述

我在我的iphone应用程序中有一个plist，我想从我的单个读取和写入一个整数并形成它。

I have plist in my iphone app and I want to read and write an integer from my single to and form it.

我有这个来读它：

 scoreData *score = [scoreData sharedData];

 filePath = @"stats.plist";
 NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];

 score.highScore = [plistDict objectForKey:@"score"];

然后写信给它：

scoreData *score = [scoreData sharedData];

 NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];

 [plistDict setValue:score.highScore forKey:@"score"];
 [plistDict writeToFile:filePath atomically: YES];

我在这两个部分都收到错误：

I am getting an error in both parts:

无效的转换形式objc_object * to int

Invalid conversion form objc_object* to int

和

无效的转换表单int to objc_object

Invalid conversion form int to objc_object

感谢任何帮助，谢谢。

推荐答案

两件事：

1. 当您在字典中设置密钥时，之后找到你的关键字和设置值之间的区别...... setObject：forKey：而不是 setValue：forKey：。

1. When you're setting a key in a dictionary, you're probably after setObject:forKey: instead of setValue:forKey:.

字典保存对象（类型 id 或 NSString * 或您自己的Obj-C对象），而不是原始类型（int，BOOL等）。

Dictionaries hold objects (type id or NSString* or your own Obj-C objects), not primitive types (int, BOOL, etc).

当你想在Obj-C集合中存储一个原始类型时，你可以将它包装在一个像这样的对象：

When you want to store a primitive type in an Obj-C collection, you can "wrap" it in an object like this:

[plistDict setObject:[NSNumber numberWithInt:score.highScore] forKey:@"score"];

然后像这样回复：

score.highScore = [[pListDict objectForKey:@"score"] intValue];

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