我只需要问一些如下的问题。假设我有一本字典。
NSMutableDictionary *xyz=[[NSMutableDictionary alloc] init];
[xyz setValue:@"sagar" forKey:@"s"];
[xyz setValue:@"amit" forKey:@"a"];
[xyz setValue:@"nirav" forKey:@"n"];
[xyz setValue:@"abhishek" forKey:@"a"];
[xyz setValue:@"xrox" forKey:@"x"];
现在,我需要检查如下
[xyz是否包含键"b“值??配对还是不配对?
问题是如何实现?
另一个问题是如何计算总键值对?
比方说NSInteger mCount=[xyz keyCounts];
发布于 2017-02-24 16:55:29
对于文字语法,可以按如下方式进行检查
static const NSString* kKeyToCheck = @"yourKey"
if (xyz[kKeyToCheck])
NSLog(@"Key: %@, has Value: %@", kKeyToCheck, xyz[kKeyToCheck]);
else
NSLog(@"Key pair do not exits for key: %@", kKeyToCheck);
https://stackoverflow.com/questions/2190056
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