iOS - 编程

1.开启3个线程顺序打印1-100

- (void)print0_100 {
    __block int i = 0;
    NSCondition *condition = [[NSCondition alloc] init];
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        while (1) {
            [condition lock];
            while (i%3 != 0) {
                [condition wait];
            }
            if (i > 100) {
                [condition unlock];
                return;
            }
            NSLog(@"A ==== i = %d",i);
            i++;
            [condition broadcast];
            [condition unlock];
        }
    });
    
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        while (1) {
            [condition lock];
            while (i%3 != 1) {
                [condition wait];
            }
            if (i > 100) {
                [condition unlock];
                return;
            }
            NSLog(@"B ==== i = %d",i);
            i++;
            [condition broadcast];
            [condition unlock];
        }
    });

    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        while (1) {
            [condition lock];
            while (i%3 != 2) {
                [condition wait];
            }
            if (i > 100) {
                [condition unlock];
                return;
            }
            NSLog(@"C ==== i = %d",i);
            i++;
            [condition broadcast];
            [condition unlock];
        }
    });

}

2.格式化字符串

给定⼀个只包含英⽂字⺟，半⻆标点（仅包括逗号，句号）和空格的字符串。请按如下规则将字符串 规范化： 1. 单词之间的空格只保留⼀个（需要删除多余的空格） 2. 标点之前的空格需要删除 3. 标点之后仅保留⼀个空格，若没有需要添加，若有两个或以上空格需要删除多余空格 4. 句⼦（以句号分割的字符串）⾸字⺟需要修正为⼤写，其他字⺟需要修正为⼩写 5. 多余的标点需要删除（⽐如连续重复逗号/句号仅保留⼀个）

#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];

    [self upDateString:@"when a father gives to his son,,, Both laugh, When a son gives to his father, , , Both cry...shakespeare.."];
}

-(void)upDateString:(NSString *)string{
    if(string.length == 0) return;
    //去除多余的符号和空格
    string = [self deleteRepeat:string withRepeatStr:@" "];
    string = [self deleteRepeat:string withRepeatStr:@","];
    string = [self deleteRepeat:string withRepeatStr:@"."];
    NSLog(@"%@", string);
    
    //全部转换为小写
    string = [string lowercaseString];

    //先去掉符号前后空格后续添加
    string = [string stringByReplacingOccurrencesOfString:@". " withString:@"."];
    string = [string stringByReplacingOccurrencesOfString:@", " withString:@","];
    string = [string stringByReplacingOccurrencesOfString:@" ." withString:@"."];
    string = [string stringByReplacingOccurrencesOfString:@" ," withString:@","];
    
    NSArray * arrayK = [string componentsSeparatedByString:@"."];
    NSMutableArray *resultArr = [NSMutableArray array];
    for (NSString *arrayString in arrayK) {
        //获取每个单词
        NSMutableArray * arrayM = [[arrayString componentsSeparatedByString:@" "] mutableCopy];
        //首个单词首字母大写
        if(arrayM.count > 0){
            NSString * first = arrayM[0];
            NSString *resultStr;
            resultStr = [first capitalizedString];
            arrayM[0] = resultStr;
        }
        //拼成字符串
        NSString *capStr = [arrayM componentsJoinedByString:@" "];
        [resultArr addObject:capStr];
    }
    string = [resultArr componentsJoinedByString:@"."];
    string = [string stringByReplacingOccurrencesOfString:@"." withString:@". "];
    string = [string stringByReplacingOccurrencesOfString:@"," withString:@", "];
    NSLog(@"%@", string);
    
}

//去掉多余字符串
-(NSString *)deleteRepeat:(NSString *)string withRepeatStr:(NSString *)repeatStr{
    NSArray *stringArr = [string componentsSeparatedByString:repeatStr];
    NSMutableArray *strArrM = [NSMutableArray array];
    for (int i = 0 ; i< stringArr.count ; i++) {
        NSString *str = stringArr[i];
        if (![str isEqualToString:@""]){
            [strArrM addObject:str];
        }else{
            //最后的符号不去掉
            if(i == stringArr.count - 1){
                [strArrM addObject:str];
            }
        }
    }
    string = [strArrM componentsJoinedByString:repeatStr];
    return string;
}
@end

3.三联得分

给定⼀个 N×N 的棋盘，上⾯有两个玩家玩棋盘游戏的局⾯。其中玩家 A 的棋⼦⽤ O 表⽰，玩家 B 的棋 ⼦⽤ X 表⽰。请计算这个局⾯下两个玩家的得分。 得分计算规则如下： 1. 如果有三个相同棋⼦在连续相邻的格⼦上，称为三连，计⼀分。 2. 相邻是包括横竖斜⽅向上的相邻。 3. 两组三连只要不完全重复，可以分别计⼀分。

#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    
    NSArray *arr = @[@[@".",@".",@".",@".",@".",@".",@".",@".",@"x",@"x",@"."],
                     @[@"x",@".",@".",@".",@".",@"x",@".",@".",@".",@".",@"."],
                     @[@".",@".",@".",@".",@".",@".",@".",@"x",@".",@".",@"."],
                     @[@".",@".",@".",@"o",@"o",@"o",@".",@".",@".",@".",@"."],
                     @[@".",@".",@".",@"o",@"o",@"o",@"o",@"x",@".",@".",@"."],
                     @[@".",@".",@".",@"o",@"o",@"o",@".",@".",@".",@".",@"."],
                     @[@".",@".",@".",@".",@"o",@".",@".",@".",@".",@".",@"."],
                     @[@".",@"x",@".",@".",@".",@".",@".",@".",@".",@".",@"."],
                     @[@".",@".",@".",@".",@".",@".",@"x",@".",@".",@".",@"."],
                     @[@".",@".",@".",@".",@".",@".",@".",@".",@".",@"x",@"."],
                     @[@".",@".",@".",@".",@".",@".",@".",@".",@".",@"x",@"."]
                     
    ];
    [self calculateScore:arr];
}

-(void)calculateScore:(NSArray *)arr {
    NSString * x = @"x";
    NSString * o = @"o";
    int xPoint = 0;
    int oPoint = 0;
 
    for (int i = 0; i < arr.count; i++) {
        for (int j = 0; j < arr.count; j++) {
       
            NSString *start = arr[i][j];
            //1.判断横轴是否连续三个能得分
            if (i < arr.count - 2 && start == arr[i + 1][j] && start == arr[i + 2][j]) {
                if (start == x) {
                    xPoint += 1;
                } else if (start == o) {
                    oPoint += 1;
                }
            }
            //2.判断斜着是否连续三个能得分
            //右下侧斜
            if (i < arr.count - 2 && j < arr.count - 2 && start == arr[i + 1][j + 1] && start == arr[i + 2][j + 2]) {
                if (start == x) {
                    xPoint += 1;
                } else if (start == o) {
                    oPoint += 1;
                }
            }
            //右上侧斜
            if (i < arr.count - 2 && j > 1 && start == arr[i + 1][j - 1] && start == arr[i + 2][j - 2]) {
                if (start == x) {
                    xPoint += 1;
                } else if (start == o) {
                    oPoint += 1;
                }
            }
            //3.判断竖着三个是否能得分
            if (j < arr.count - 2 && start == arr[i][j + 1] && start == arr[i][j + 2]) {
                if (start == x) {
                    xPoint += 1;
                } else if (start == o) {
                    oPoint += 1;
                }
            }
        }
    }
    //打印得分
    NSLog(@"%d",oPoint);
    NSLog(@"%d",xPoint);
    
}

@end