objective-c（架構）

標籤：

架構指objective-c的foundation庫，下面的例子中給出幾個常見用的類及其方法。

• 數值對象

        NSNumber *intNum;        NSNumber *longNum;        NSNumber *floatNum;                intNum = [NSNumber numberWithInteger:12];        NSLog(@"%i", [intNum integerValue]);                longNum = [NSNumber numberWithLong:0x123456];        NSLog(@"%lx", [longNum longLongValue]);                floatNum = [NSNumber numberWithFloat:12.00];        NSLog(@"%f", [floatNum floatValue]);                if([intNum isEqualToNumber:floatNum] == YES){            NSLog(@"eqaul"); //相同        }else{            NSLog(@"not equal");        } 

•  字串

        NSString *str1 = @"hello,world";        NSString *str2 = [NSString stringWithFormat:@"%i,%@", 5, @"fredric"];        NSLog(@"%@%@", str1,str2);        NSLog([str1 stringByAppendingString:str2]);                NSMutableString *str3 = [NSMutableString stringWithString:@"hello"];        [str3 appendString:@"fredric_"];        [str3 insertString:@"word" atIndex:str3.length];        NSLog(@"%@",str3); //hellofredric_word                NSRange res = [str3 rangeOfString:@"ric"];        if(res.location != NSNotFound){            [str3 deleteCharactersInRange:res];        }                NSLog(@"%@",str3); //hellofred_word

• 數組

       NSArray *array = [NSArray arrayWithObjects:@"demo1",@"demo2",@"demo3", nil];                for(int i = 0; i < [array count]; i++){            NSLog(@"%@",[array objectAtIndex:i]);        }                NSMutableArray *mArray = [NSMutableArray arrayWithCapacity:3];        [mArray addObject:@"demo4"];        [mArray addObject:@"demo5"];        [mArray addObject:@"demo6"];                for(int i = 0; i < [mArray count]; i++){            NSLog(@"%@",[mArray objectAtIndex:i]);        }

• 字典

        NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:@"value1",@"key1",@"value2",@"key2",@"valu3", @"key3", nil];        NSString *value1 = [dic objectForKey:@"key1"];        NSLog(@"%@", value1);                NSMutableDictionary *mDic = [[NSMutableDictionary alloc]init];        [mDic setObject:@"value1_1" forKey:@"key1"];        NSLog(@"%@", [mDic objectForKey:@"key1"]);

objective-c（架構）