ios 學習筆記 3

        NSLog(@"Hello, World!");
        NSDictionary *myDic=[[NSDictionary alloc]initWithObjectsAndKeys:@"張三",@"name",@"李四",@"name", nil];

        NSUInteger count = [myDic count];  
        NSLog(@"詞典的數量為：  %lu",count); 

        NSEnumerator * myEnumerator = [myDic keyEnumerator];  


for (NSObject *object in myEnumerator) {  
            NSLog(@"遍曆KEY的值: %@",object);  
        }

        myEnumerator = [[myDic allValues] objectEnumerator];
        NSString *value;
while((value = [myEnumerator nextObject]))
        {
            NSLog(@"遍曆的值: %@",value);
        }

//通過KEY找到value  
        NSObject *myObject = [myDic objectForKey:@"name"];

if (myObject != nil) {  
            NSLog(@"通過KEY找到的value是: %@",myObject);  
        }  

        NSMutableDictionary *mydic2 = [NSMutableDictionary dictionaryWithCapacity:10];  
        [mydic2 setObject:@"Alex Hu" forKey:@"name"];  
        [mydic2 setObject:@"1388888888" forKey:@"mobile number"]; 

for (NSObject *object in [mydic2 objectEnumerator]) {  
            NSLog(@"遍曆的值: %@",object);  
        }

        NSSet *mySet=[NSSet setWithObjects:@"A",@"B",@"C",@"D",[NSNumber numberWithInteger:123], nil];
        count=[mySet count];
        NSLog(@"count= %lu",count);

        myEnumerator=[mySet objectEnumerator];
for (NSObject *object in myEnumerator) {
            NSLog(@"myEnumerator value=%@",object);
if ([object isEqualTo:@"A"]) {
                NSLog(@"找到A了");
            }
if ([object isEqual:@"B"]) {
                NSLog(@"找到B");
            }
        }

        NSArray *mySetArr=[mySet allObjects];
for (NSUInteger i=0; i<[mySetArr count];i++) {
            NSLog(@"%lu =>%@",i,[mySetArr objectAtIndex:i]);
        }

if ([mySet containsObject:@"D"]) {  
            NSLog(@"集合中包含 D這個對象");  
        }