摘要：
Cocoa中常用的类NSStringNSMutableString赋值NSString *myString = @"some string";NSString *myString = [NSStringstringWithFormat:@"object = %@",someObject];转换NSString *upper = [myStringuppercaseString];intintString = [myStringintValue];去内容NSString *trimmed = [myString string ByTrimmingCharactersInSet: [NSChara 阅读全文
