如何分隔@「;」之前的第一個字符串在一個數組？

Question

我想在一個數組來分割字符串：

NSString *test = @"How are you;<random>[Good;Bad]"; 
NSArray *howareyou = [test componentsSeparatedByString:@";"] 

但後來它分裂<random>[Good和Bad] ...

我只是想分裂How are you和<random>[Good;Bad]

哪有我這樣做？

Answer 1

NSString *test = @"How are you;<random>[Good;Bad]"; 
NSRange colonRange = [test rangeOfString:@";"]; 
if (colonRange.location != NSNotFound){ 
    NSString *firstHalf = [test substringToIndex:colonRange.location]; 
    NSString *secondHalf = [test substringFromIndex:NSMaxRange(colonRange)]; 
    NSLog(@"%@ - %@", firstHalf, secondHalf); 
}else{ 
    NSLog(@"No luck"); 
} 

Answer 2

NSString *test = @"How are you;<random>[Good;Bad]"; 
NSArray *howareyou = [test componentsSeparatedByString:@";"]; 

NSString *desired = [howareyou objectAtIndex:0]; 
NSString *rest = [[howareyou subarrayWithRange:NSMakeRange(1, [howareyou count]-1)] 
         componentsJoinedByString:@";"]; 

沒有得到有效的少得多（或脆 - 沒有錯誤檢查，範圍檢查，長度檢查，等...）比。這裏和那裏的長度有限，可能對於大量輸入等是不可接受的。

先測量。優化後。