OC 第五天

//
//  main.m
//  02-NSNumber
//

#import <Foundation/Foundation.h>

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

    @autoreleasepool {
        /**
         NSNumber  作用：将简单的数据类型转化为对象
         原因：why？
         在oc当中数组，字典等存储的数据都要求是对象
         */

        //创建：
        //简单数据类型
        int weight = 40;
        float height = 10;

        //转化成相应的对象
        NSNumber *intNum = [[NSNumber alloc]initWithInt:weight];
        NSNumber *floatNum = [[NSNumber alloc]initWithFloat:height];

        NSLog(@"intNum:%@,floatNum:%@",intNum,floatNum);

        //将对象存入数组
        NSArray *array = @[intNum,floatNum];

        //将对象转化成
        int nowInt = [intNum intValue];

        float nowFloat = [floatNum floatValue];

        //比较
        NSComparisonResult result = [intNum compare:floatNum];
        NSLog(@"%li",result);

    }
    return 0;
}

//
//  main.m
//  03-SEL
//

#import <Foundation/Foundation.h>
#import "Dog.h"
int main(int argc, const char * argv[])
{

    @autoreleasepool {
        //让编译器对不确定是否存在的方法的警告不提示
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"

    //SEL：是一种专门存储方法的数据类型
        //格式：@selector(方法)
//        SEL sel = @selector(bark);
//        
//        Dog *dog = [[Dog alloc]init];
//       // [dog bark];
//       // [dog eat:@"苹果"];
//        
//        
//        //容错处理
//        //respondsToSelector: 看对象是否响应后面的方法
//        if ([dog respondsToSelector:sel]) {
//            //performSelector: 专门来完成方法的调用的
//            [dog performSelector:sel];
//        }
//        
//         SEL sel1 = @selector(eat:);
//        //respondsToSelector: 看对象是否响应后面的方法
//        if ([dog respondsToSelector:sel1]) {
//            //performSelector: withObject:专门来完成方法的调用的，调用的时带参数的
//            [dog performSelector:sel1 withObject:@"苹果"];
//        }

        NSString *string1 = [NSString stringWithContentsOfFile:@"/Users/qianfeng/Desktop/方法列表.rtf" encoding:NSUTF8StringEncoding error:nil];

        NSArray *array = [string1 componentsSeparatedByString:@"*"];

        NSLog(@"array:%@",array);
        for (NSString *string in array) {
            SEL sel2 = NSSelectorFromString(string);
            Dog *dog1 = [[Dog alloc]init];
            if ([dog1 respondsToSelector:sel2]) {
                [dog1 performSelector:sel2];
            }
        }

    }
    return 0;
}

//
//  main.m
//  04-数组排序
//

#import <Foundation/Foundation.h>
#import "MyClass.h"
int main(int argc, const char * argv[])
{

    @autoreleasepool {

        //创建学生
        Student *student1 = [[Student alloc]initWithName:@"xiaolan" age:21 andScore:100];
        Student *student2 = [[Student alloc]initWithName:@"ligang" age:10 andScore:10];
        Student *student3 = [[Student alloc]initWithName:@"zhangliang" age:11 andScore:80];

        //创建班级
        MyClass *myClass = [[MyClass alloc]initWithName:@"1438"];
        [myClass.students addObject:student1];
        [myClass.students addObject:student2];
        [myClass.students addObject:student3];

        //现在实现了sortUsingSelector：方法
        //按照学生的年龄 降序排列 
        [myClass.students sortUsingSelector:@selector(isYoungerThanotherStudent:)];

        //但是没有给标准 （按照年龄，姓名，是升序还是降序啊）

        //所以要给他一个标准（通过一个方法得到的）

        //方法要放在那里？
        //放在数组的元素所在的类里面

        //按照学生的年龄 升序排列
        [myClass.students sortUsingSelector:@selector(isSmallThanOtherStudent:)];
        NSLog(@"%@",myClass);
    }
    return 0;
}

//比年龄
//降序
-(BOOL)isYoungerThanotherStudent:(Student *)student{
    //比较条件
    return self.age < student.age;
}

//比姓名
//升序
-(BOOL)isSmallThanOtherStudent:(Student *)student{
    return [self.name  compare:student.name] > 0;
}

//
//  main.m
//  05-字典
//

#import <Foundation/Foundation.h>

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

    @autoreleasepool {
        /**
        字典：是对象，是一种存储数据的对象
         形式：键（key）-值（value）对 的形式保存数据，字典没有顺序之说。
         分类：可变字典，不可变字典
         */

        //介绍不可变字典
        //创建
        //1.空的
        NSDictionary *dictionary1 = [NSDictionary dictionary];

        //2.通过对象方法
        //一般key都是字符串
        //注意：字典也是以nil结尾
        NSDictionary *dic2 = [[NSDictionary alloc]initWithObjectsAndKeys:@"apple",@"1",@"orange",@"2", nil];

        NSLog(@"dic2:%@",dic2);
        //objects:所有的值  forKeys：所有的键（key）
        NSDictionary *dic3 = [[NSDictionary alloc]initWithObjects:@[@"apple",@"orange"] forKeys:@[@"1",@"2"]];

        NSLog(@"dic3:%@",dic3);

        //类方法
        NSDictionary *dic4 = [NSDictionary dictionaryWithObjects:@[@"apple",@"orange"] forKeys:@[@"1",@"2"]];

        //添加一个元素
        NSDictionary *dic5 = [NSDictionary dictionaryWithObject:@"apple" forKey:@"1"];

        //快速创建
        //@{键：值，键：值}
        NSDictionary *dic6 = @{@"1": @"apple",@"2":@"orange"};

        //取元素
        NSString *string = [dic3 objectForKey:@"1"];
        NSLog(@"string:%@",string);

        //取所有的key
        NSArray *keys = [dic3 allKeys];
        //取所有的value
        NSArray *values = [dic3 allValues];

        //遍历
        for (int i = 0; i<[dic3 count]; i++) {
            NSString *key = [NSString stringWithFormat:@"%i",i+1];
            NSLog(@"%@",[dic3 objectForKey:key]);
        }

        //快速遍历
        //in前面是key
        for (NSString *key in dic3) {
            NSLog(@"%@",[dic3 objectForKey:key]);
        }

        /**
         例子
         通讯录
         张三   12345  男
         李四   234344 女
         王五   08909  男
         李红   244344 女
         */

        NSDictionary *dic7 = @{@"张三":@[@"12345",@"男"],
                               @"李四":@[@"234564",@"女"],
                               @"王五":@[@"08909",@"男"],
                               @"李红":@[@"244344",@"女"]
                               };
        for (NSString *key in dic7) {
            //快速取值：dic7[写键]
            NSArray *array = dic7[key];

            NSLog(@"%@的电话是%@，性别是：%@",key,array[0],array[1]);
        }

        //可变字典
        //创建 空可变字典
        NSMutableDictionary *mutDic1 = [[NSMutableDictionary alloc]initWithCapacity:20];
        //操作
        //增
        [mutDic1 addEntriesFromDictionary:dic7];

        NSLog(@"mutDic1:%@",mutDic1);

        //增加一个
        [mutDic1 setObject:@"banana" forKey:@"55"];

//        //删
//        [mutDic1 removeObjectForKey:@"55"];
//        
//        //删多个
//        [mutDic1 removeObjectsForKeys:@[@"1",@"2"]];
//        
//        //删全部
//        [mutDic1 removeAllObjects];

        //改
        [mutDic1 setObject:@"pair" forKey:@"55"];
        NSLog(@"mutDic1:%@",mutDic1);

        //查
        //遍历
        NSMutableDictionary *mutDic8 = [NSMutableDictionary dictionary];
        [mutDic8 setObject:@[@"2222",@"男"] forKey:@"张三"];

    }
    return 0;
}