[英]Write/Read plist file iPhone
I have plist in my iphone app and I want to read and write an integer from my single to and form it. 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 this to read 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"];
Then to write to it: 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];
I am getting an error in both parts: 我在这两个部分都收到错误:
Invalid conversion form objc_object* to int 无效的转换形式objc_object *到int
and 和
Invalid conversion form int to objc_object int到objc_object的转换形式无效
I appreciate any help, thanks. 我感谢任何帮助,谢谢。
Two things: 两件事情:
When you're setting a key in a dictionary, you're probably after setObject:forKey:
instead of setValue:forKey:
. 当你在字典中设置一个键时, 你可能在 setObject:forKey:
而不是setValue:forKey:
。
Dictionaries hold objects (type id
or NSString*
or your own Obj-C objects), not primitive types (int, BOOL, etc). 字典包含对象(类型id
或NSString*
或您自己的Obj-C对象),而不是基本类型(int,BOOL等)。
When you want to store a primitive type in an Obj-C collection, you can "wrap" it in an object like this: 如果要在Obj-C集合中存储基本类型,可以将其“包装”在如下对象中:
[plistDict setObject:[NSNumber numberWithInt:score.highScore] forKey:@"score"];
And get it back like this: 然后像这样回复:
score.highScore = [[pListDict objectForKey:@"score"] intValue];
See if this answers your question: 看看这是否回答了你的问题:
How to create a new custom property list in iPhone Applications 如何在iPhone应用程序中创建新的自定义属性列表
You could use NSUserDefaults but of course highScore isn't really a default. 您可以使用NSUserDefaults,但当然highScore并不是默认值。
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