Objective-C中的字符串解析

Question

当我有pf:/Abc/def/,我怎么能得到/Abc/def/？

使用Python,我可以使用

string = 'pf:/Abc/def/'
string.split(':')[1]

甚至

string[3:]

Objective-C中的等效功能是什么？

Answer 1

NSString *string = [NSString stringWithFormat:@"pf:/Abc/def/"];
NSArray *components = [string componentsSeparatedByString: @":"];
NSString *string2 = (NSString*) [components objectAtIndex:1];

参考:http://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html#//apple_ref/occ/instm/NSString/componentsSeparatedByString:

componentsSeparatedByString将返回NSArray.您在某个索引处获取对象,并在将其存储到另一个变量时将其强制转换为NSString.