oc字典

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {

@autoreleasepool {

NSNumber *num=[NSNumber numberWithInt:100];

NSDictionary *dic=[NSDictionary dictionaryWithObject:num  forKey:@"money"];

NSDictionary *dics=[NSDictionary dictionaryWithObjectsAndKeys:@"Jay",@"name",@"22",@"age",@"F",@"gender",nil];

NSDictionary *dic1=@{@"name":@"White",

@"age":@"23",

@"gender":@"M"};

NSDictionary *dic2=[NSDictionary dictionaryWithDictionary:dic1];

NSLog(@"%@",dic);

//key－value共有多少对

NSInteger count=[dic2 count];

NSLog(@"count=%ld",count);

//获取字典内value值

NSString *name=[dic2 objectForKey:@"name"];

NSLog(@"根据key找value－－姓名:%@",name);

//获取字典内所有的value

NSArray *values=[dic2 allValues];

for (id str in values) {

NSLog(@"%@",str);

}

//获取字典内所有的key

NSArray *keys=[dic2 allKeys];

for (id str in keys) {

NSLog(@"%@",str);

}

}

return 0;

}