object c Dictionaries

你需把一组对象以 K-Value(键值对)的形式保存起来,数组没办法做到。 

NSNumber *age = [NSNumber numberWithUnsignedInteger:51]; NSDictionary *person = [[NSDictionaryalloc] initWithObjectsAndKeys: @"Anthony",  @"First Name",

@"Robbins",  @"Last Name", age,  @"Age", nil];

NSNumber *age = [NSNumber numberWithUnsignedInteger:51];NSMutableDictionary *person = [[NSMutableDictionaryalloc]initWithObjectsAndKeys: @"Anthony", @"First Name", @"Robbins", @"Last Name",age, @"Age",

nil]; [personremoveObjectForKey:@"Age"]; NSLog(@"First Name = %@", [person objectForKey:@"First Name"]);NSLog(@"Last Name = %@", [person objectForKey:@"Last Name"]);NSLog(@"Age = %@", [person objectForKey:@"Age"]);

NSNumber *age = [NSNumber numberWithUnsignedInteger:51];NSDictionary *person = [[NSDictionaryalloc] initWithObjectsAndKeys:@"Anthony", @"First Name", @"Robbins", @"Last Name", age, @"Age", nil]; [personenumerateKeysAndObjectsUsingBlock:^(__strong id key, __strong id obj, BOOL *stop) {NSLog(@"Key = %@, Object For Key = %@", key, obj);

}];

for (id keyInDictionary in [person allKeys]){
idobjectForKey = [person objectForKey:keyInDictionary];
NSLog(@"Key = %@, Object For Key = %@", keyInDictionary, objectForKey);} 

SEnumerator *keys = [person keyEnumerator];
idkeyInDictionary = nil;
while ((keyInDictionary = [keys nextObject]) != nil){
idobjectForKey = [person objectForKey:keyInDictionary];
NSLog(@"Key = %@, Object For Key = %@", keyInDictionary, objectForKey);}