从NSString中的某个字符获取子字符串

Question

如果我最初有一个NSString:

"ABCDE*FGHI"

如何让它变成

"FGHI"

换句话说,保留了从星号开始的所有内容.

同样,我怎么把它变成:

"ABCDE"

(保留星号的一切)

谢谢

Answer 1

NSString *myString = @"ABCDE*FGHI"; 
NSArray *myArray = [myString componentsSeparatedByString:@"*"];

• myArray的键0将包含@"ABCDE"
• 键1将包含@"FGHI"

如果您想要多个字符作为分隔符,请
使用componentsSeparatedByCharactersInSet:

NSString *myString = @"ABCDE*FGHI-JKL"; 
NSArray *myArray = [myString componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"*-"]];

• myArray的键0将包含@"ABCDE"
• 键1将包含@"FGHI"
• 键2将包含@"JKL"

Answer 2

NSString *myString = @"ABCDE*FGHI";
NSString *subString = [myString substringWithRange: NSMakeRange(0, [myString rangeOfString: @"*"].location)];

Answer 3

NSString *myString = @"ABCDE*FGHI";
NSArray *myArray = [myString componentsSeparatedByString:@"*"];