ios - 从 NSString 获取一个子串直到到达一个特定的词

Question

假设我有这个 NSString:@"Country Address Tel:number"。如何获取 Tel 之前的子字符串？ (国家地址)然后如何获取 Tel 之后的子字符串？ (数量)

Answer 1

使用 NSScanner:

NSString *string = @"Country Address Tel:number";
NSString *match = @"tel:";
NSString *preTel;
NSString *postTel;

NSScanner *scanner = [NSScanner scannerWithString:string];
[scanner scanUpToString:match intoString:&preTel];

[scanner scanString:match intoString:nil];
postTel = [string substringFromIndex:scanner.scanLocation];

NSLog(@"preTel: %@", preTel);
NSLog(@"postTel: %@", postTel);

NSLog 输出:

preTel: Country Address
postTel: number