如何在iphone中拆分字符串？答案

【问题标题】：How to Split a string in iphone?如何在iphone中拆分字符串？
【发布时间】：2011-04-26 07:43:17
【问题描述】：

AERP|01,KSE;04,NCEL;05,GSE;|<END>

这是我的字符串，现在我想把它分成两个数组，比如

array1 = 01,04,05。 array2 = KSE,NCEL,GSE

并忽略"AERP|" & "|<END>".

注意：我在目标 c 工作。

【问题讨论】：

您尝试了哪些不起作用的方法，您需要帮助吗？你看过 NSString 类的文档吗？

标签： iphone objective-c arrays string split

【解决方案1】：

假设|、;、, 是重要性递减的分隔符，我将首先删除开头和结尾，然后分成数字/助记符对，然后将它们分开。它会是这样的：

NSString* input = @"AERP|01,KSE;04,NCEL;05,GSE;|<END>";
NSArray* splits = [input componentsSeparatedByString: @"|"];
// In real life, check that splits has three elements

NSString* body = [splits objectAtIndex: 1];
splits = [body componentsSeparatedByString: @";"];

NSMutableArray* numbers = [[NSMutableArray alloc] init];
NSMutableArray* mnemonics = [[NSMutableArray alloc] init];
for (NSString* item in splits)
{
    NSArray* parts = [item componentsSeparatedByString: @","];
    if ([parts count] == 2)
    {
        [numbers addObject: [parts objectAtIndex: 0]]; // Could convert the part to a number here 
                                                       // with NSDecimalNumber numberWithString: or alternative
        [mnemonics addObject: [parts objectAtIndex: 1]];
    }
}

【讨论】：

【解决方案2】：

使用NSStringcomponentsSeparatedByCharactersInSet

- (NSArray *)componentsSeparatedByCharactersInSet:(NSCharacterSet *)separator

要构建自己的NSCharacterSet，请使用NSMutableCharacterSet

NSMutableCharacterSet *_alnum = [NSMutableCharacterSet characterSetWithCharactersInString@"|"];

【讨论】：

或使用-componentsSeparatedByString:

【解决方案3】：

NSString *stringToParse = [string substringWithRange:NSMakeRange(5, [string length] - 7)];
/* stringToParse = @"01,KSE;04,NCEL;05,GSE" */
NSArray *keyValuePairs = [stringToParse componentsSeparatedByString:@";"];
NSMutableArray *indices = [NSMutableArray array];
NSMutableArray *labels = [NSMutableArray array];
for (NSString *keyValueString in keyValuePairs) {
    NSArray *keyValuePairing = [keyValueString componentsSeparatedByString:@","]; 
    [indices addObject:[keyValuePairing objectAtIndex:0]];
    [labels addObject:[keyValuePairing objectAtIndex:1]];
}

【讨论】：

【解决方案4】：

NSString *astring=  @"AERP|01,KSE;04,NCEL;05,GSE;|<END>";
    NSArray *aq=[astring componentsSeparatedByString:@"|"];
    NSString *sw=[aq objectAtIndex:1];
    NSArray *aq2=[sw componentsSeparatedByString:@","];
    NSArray *aq3=[[aq2 objectAtIndex:1] componentsSeparatedByString:@";"];
    NSArray *aq4=[[aq2 objectAtIndex:2] componentsSeparatedByString:@";"];
    NSMutableArray *a1,*a2;
    a1=[NSMutableArray array];
    a2=[NSMutableArray array];
    [a1 addObject:[aq2 objectAtIndex:0]];
    [a1 addObject:[aq3 objectAtIndex:1]];
    [a1 addObject:[aq4 objectAtIndex:1]];
    [a2 addObject:[aq3 objectAtIndex:0]];
    [a2 addObject:[aq4 objectAtIndex:0]];
    [a2 addObject:[aq2 objectAtIndex:3]];

修改数组的名称，因为我很匆忙。

【讨论】：