NSArray *stringArray = @[@"甲",@"已",@"丙",@"丁"];
NSString *arrrayString = [testArray componentsJoinedByString:@"-"];
NSLog输出：arrrayString
甲-已-丙-丁
NSString *string = @"甲-已-丙-丁";
NSArray*stringArray = [string componentsSeparatedByString:@"-"];
NSLog输出：stringArray
(
"\U7532",
"\U5df2",
"\U4e19",
"\U4e01"
)
