obj-c9[[NSDate,{Category分类,Extension,管理'私有”方法,Protocol （协议)}]

#import <Foundation/Foundation.h>
//#import "Person.h"
#import "NSString+SayHiMessage.h"
#import "NSMutableArray+ChangeArray.h"

#import "NSString+ExchangeChineseToEnglish.h"

#import "NSString+EmailValidation.h"//邮箱验证
#import "NSArray+PartitionArray.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
                            //类的扩展

        //1.NSDate和NSDateForMatter

        //获取当前时间
        //但是打印出来的就是零时区的时间
        //NSLog(@“%@”,nowDate)；无论你是哪个时区的时间，打印时总是打印对应的0时区时间

//        NSDate * date = [NSDate date];
//        NSLog(@"%@",date);
//        //日期格式类,用于日期和字符串之间的相互转换
//        NSDateFormatter * dateformatter = [[NSDateFormatter alloc] init];
//        //设置日期的转换格式
//        //E周几 EEEE星期几
//        //HH是24小时制, hh是12小时制  a是上下午
//        dateformatter.dateFormat = @"yyyy-MM-dd EEEE hh:mm:ss a";
//        //使用dateFormat把日期转换成字符串
//        NSString * dateString = [dateformatter stringFromDate:date];
//        NSLog(@"%@",dateString);.
       
        //获取当前时间多少秒之后的一个时间
//        NSDate  * date = [NSDate dateWithTimeIntervalSinceNow:3600];
//        NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
//        [formatter setDateFormat:@"yyyy-MM-dd EEEE hh:mm:ss"];
//        NSString * str =  [formatter stringFromDate:date];
//        NSLog(@"%@",str);
   
//-------------------------------------------------
//        //服务器端给我们返回的时间戳(字符串类)
//        NSString * timeString = @"20150101093245";
//        NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
//        //转换格式要一致
//        [formatter setDateFormat:@"yyyyMMddhhmmss"];
//        //借助NSDateFormatter 把字符串转换日期
//        NSDate * getDate = [formatter dateFromString:timeString];
//        NSLog(@"%@",getDate);
//       
//        //获取当前时间
//        NSDate * currentDate = [NSDate date];
//        //获取两个时间差
//        NSTimeInterval seconds = [currentDate timeIntervalSinceDate:getDate ];
//        NSLog(@"%.1f秒前",seconds);
//        if (seconds >= 0 && seconds <= 300 ) {
//            NSLog(@"刚刚..");
//        }else if (seconds > 300 && seconds <= 3600){
//            NSLog(@"%d分钟之前..",(int)seconds / 60);
//        }else if (seconds > 3600 && seconds <=86400){
//            NSLog(@"%d小时前..",(int)seconds / 3600);
//        }else if (seconds > 86400 && seconds <=259200){
//            NSLog(@"%d天前..",(int) seconds / 86400);
//        }else if(seconds > 259200){
//            NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
//            [formatter setDateFormat:@"yyyy-MM-dd"];
//            NSString * str =  [formatter stringFromDate:getDate];
//            NSLog(@"%@",str);
//        }
//-------------------------------------------------
       
        //从1970年到当前时间流逝的秒数
//        NSDate * currentDate = [NSDate date];
//        NSTimeInterval seconds = [currentDate timeIntervalSince1970];//currentDate.timeIntervalSince1970;
//        NSLog(@"%.1f",seconds);
       
        //从一个1970年流逝的秒数得到一个时间
//        NSTimeInterval seconds = 1251253251;
//        NSDate * getDate = [NSDate dateWithTimeIntervalSince1970:seconds];
//        NSLog(@"%@",getDate);
       
       
        //2.类目(分类)  Category主要作用是为没有源代码的类添加方法()
//        NSString * str = @"蓝鸥";
//        [str sayHi];
       
//        NSString * str = @"河南";

//        [str sayHello];

 //数组逆序输出
- (void)sortedArray{
     for (int i = 0; i < [self count] / 2; i++) {
         [self exchangeObjectAtIndex:i withObjectAtIndex:([self count]  - 1 - i)];
    }

}    // .

//        NSMutableArray * array = [NSMutableArray arrayWithObjects: @"1", @"2",@"3",@"4", @"5", nil ];
//        [array sortedArray];
//        NSLog(@"%@",array);

       - (NSString *)transformMandarinToLatin
{
    /*复制出一个可变的对象*/
    NSMutableString *preString = [self mutableCopy];
    /*转换成成带音 调的拼音*/
    CFStringTransform((CFMutableStringRef)preString, NULL, kCFStringTransformMandarinLatin, NO);
    /*去掉音调*/
    CFStringTransform((CFMutableStringRef)preString, NULL, kCFStringTransformStripDiacritics, NO);
   
    /*多音字处理*/
    if ([[(NSString *)self substringToIndex:1] compare:@"长"] == NSOrderedSame)
    {
        [preString replaceCharactersInRange:NSMakeRange(0, 5) withString:@"chang"];
    }
    if ([[(NSString *)self substringToIndex:1] compare:@"沈"] == NSOrderedSame)
    {
        [preString replaceCharactersInRange:NSMakeRange(0, 4) withString:@"shen"];
    }
    if ([[(NSString *)self substringToIndex:1] compare:@"厦"] == NSOrderedSame)
    {
        [preString replaceCharactersInRange:NSMakeRange(0, 3) withString:@"xia"];
    }
    if ([[(NSString *)self substringToIndex:1] compare:@"地"] == NSOrderedSame)
    {
        [preString replaceCharactersInRange:NSMakeRange(0, 3) withString:@"di"];
    }
    if ([[(NSString *)self substringToIndex:1] compare:@"重"] == NSOrderedSame)
    {
        [preString replaceCharactersInRange:NSMakeRange(0, 5) withString:@"chong"];
    }
    return preString;

}

        //姓名转换拼音
//        NSString * str = @"张三";
//        NSString * string = [str transformMandarinToLatin];
//        NSLog(@"%@",string);
       

        //邮箱验证

-(BOOL)isValidateEmail {
//利用正则表达式验证

    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];

    return [emailTest evaluateWithObject:self];

}

//        NSString * str = @"[email protected]";
//        BOOL result = [str isValidateEmail];
//        NSLog(@"%@",result ? @"YES" : @"NO");

       

- (NSArray *)partitionArray:(int)n{
    NSMutableArray * array = [NSMutableArray arrayWithCapacity:1];
    for (int i = 0; i < [self count]; i++) {
        if (i % n == 0) {
            NSMutableArray * smallArray = [NSMutableArray arrayWithCapacity:1];
            [array addObject:smallArray];//添加小数组
        }
        [[array lastObject] addObject:[self objectAtIndex:i]];//往小数组里面加元素
        }
    return [NSArray arrayWithArray:array];

}

        //大数组分割小数组
//        NSArray * arr = [NSArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5", nil];
//        NSArray * array = [arr partitionArray:(2)];
//        NSLog(@"%@",array);
       
        //3.Extension 延展 作用:便于管理类的"私有"方法和私有实例变量
        //oc中没有绝对的私有方法

        //oc"私有"方法就是指,在.h里面没有声明,只在.m有实现的方法

//4.协议就是一堆方法声明

//只有类可以接受协议接受协议使用<>,如果一个类接受一个协议,就必须实现协议里面的@required方法,一个类可以接受多个协议,多个协议之间,逗号,隔开.

//协议里面的方法,使用@required是必须实现,使用@optional是可选实现,不写默认是@required

main.m

        Boy * boy = [[Boy alloc] init];
       
        Gril * gril1 = [[Gril alloc] init];
       
        gril1.delegate = boy;
       

        [gril1 hungry:@"青椒鸡蛋面."];

@protocol TestProtocol <NSObject>

//methods//方法
@required//必须的实现方法
- (void)test1;
- (void)test2;
@optional//可选的实现方法

- (void)test3;

@end

@interface Person : NSObject <TestProtocol, OtherProtocol>/*接受多个协议*/

@end

@implementation Gril
- (void)hungry:(NSString *)wantFood{
    //"询问"代理,得到一个结果
    if([_delegate respondsToSelector:@selector(doHouseWord)]){
       
    BOOL result = [_delegate doHouseWord];
    if (result) {
        NSLog(@"完成了");
        NSLog(@"开始做饭");
        //NSObject的方法,判断一个对象是否实现了某个方法
        if ([_delegate respondsToSelector:@selector(doCook:)]) {
            //让代理做饭
            [_delegate doCook:wantFood];
        }
    }else{
        NSLog(@"继续干..");
    }

    }

}

@end

#import <Foundation/Foundation.h>

@protocol MarriedProtocol <NSObject>

@required
- (void)doCook:(NSString *)FoodName;
- (BOOL)doHouseWord;
@optional
- (void)dirveCar;

@end

@interface Gril : NSObject
//id<MarriedProtocol>/*基于类型的限定*/
//MarriedProtocol协议的类的对象,才能成为她的丈夫
@property (nonatomic,assign)id<MarriedProtocol> delegate;


- (void)hungry:(NSString *)wantFood;

@end