IOS 两个工具类

1.根据英文字符数组获取索引数组

+ (NSArray *)worldToNumberWithNum:(NSArray *)numArr
{
    NSArray *wArr = @[@"A",@"B",@"C",@"D",@"E",@"F",@"G",@"H",@"I",@"G",@"K",@"L",@"M",@"N",@"O",@"P",@"Q",@"R",@"S",@"T",@"U",@"V",@"W",@"X",@"Y",@"Z"];
    NSMutableArray *indexArr = [[NSMutableArray alloc] initWithCapacity:0];
    for (int i = 0; i < numArr.count; i ++) {
        int index = (int)[wArr indexOfObject:numArr[i]];
        [indexArr addObject:[NSString stringWithFormat:@"%d",index]];
    }
    return indexArr;
}

 

 

2.字符串转数组

   除了系统提供的切割字符串，当切割类似@“abc”

+ (NSArray *)StrToArr:(NSString *)wStr
{
    NSRange range;
    NSMutableArray *subArr = [[NSMutableArray alloc] initWithCapacity:0];
    for (int i = 0; i < wStr.length; i ++) {
        range = [wStr rangeOfComposedCharacterSequenceAtIndex:i];
        NSString *subStr = [wStr substringWithRange:range];
        [subArr addObject:subStr];
    }
    return subArr;
}