摘自https://www.jianshu.com/p/4c1c2ded4bf2
NSArray *numArr = @[@"2",@"A",@"K",@"Q",@"J",@"10",@"9",@"8",@"7",@"6",@"5",@"4",@"3"];
//组合54张牌，先是大小王
NSMutableArray *allPokerArr = [NSMutableArray arrayWithArray:@[@"大王",@"小王"]];
for (NSString *numStr in numArr) {//组合不同花色不同数字的牌
for (NSString *colorStr in colorArr) {
NSString *newStr = [colorStr stringByAppendingString:numStr];
[allPokerArr addObject:newStr];
}
}
//随机打乱这54张牌
NSArray *mixArr = [allPokerArr sortedArrayUsingComparator:^NSComparisonResult(id _Nonnull obj1, id _Nonnull obj2) {
int seed = arc4random_uniform(2);
if (seed) {
return [obj1 compare:obj2];
} else {
return [obj2 compare:obj1];
}
}];
//随便构造一个范围，取出混合后的54张牌中的这个范围内的17张牌
NSRange range = NSMakeRange(10, 17);
NSArray *newArr = [mixArr subarrayWithRange:range];
//排序这17张牌
NSMutableArray *resultArr = [NSMutableArray arrayWithArray:allPokerArr];
for (NSString *str in allPokerArr) {
if (![newArr containsObject:str]) {
[resultArr removeObject:str];
}
}
