以 NSArray 的形式获取 NSDictionary 的所有键

是否有可能从一个特定的 NSDictionary获得所有的键作为一个独立的 NSArray？

objective-c
nsarray
nsdictionary

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Yes it's possible. Use allKeys method:

NSDictionary *yourDictionary;
NSArray * yourKeys
yourKeys = [yourDictionary allKeys];

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最佳答案

Just use

NSArray*keys=[dict allKeys];

In general, if you wonder if a specific class has a specific method, look up Apple's own documentation. In this case, see NSDictionary class reference. Go through all the methods. You'll discover many useful methods that way.

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And if you want to get all keys and values, here's what you do:

for (NSString *key in dictionary) {
id value = dictionary[key];
NSLog(@"Value: %@ for key: %@", value, key);
}