three20 阅读到的代码

//返回资源路径

NSString* TTPathForDocumentsResource(NSString* relativePath) {
  static NSString* documentsPath = nil;
  if (nil == documentsPath) {
    NSArray* dirs = NSSearchPathForDirectoriesInDomains(
      NSDocumentDirectory, NSUserDomainMask, YES);
    documentsPath = [[dirs objectAtIndex:0] retain];
  }
  return [documentsPath stringByAppendingPathComponent:relativePath];
}

格式化数值为xx,xxx,xxx.xx   

NSString* TTFormatInteger(NSInteger num) {
  NSNumber* number = [NSNumber numberWithInt:num];
  NSNumberFormatter* formatter = [[NSNumberFormatter alloc] init];
  [formatter setNumberStyle:NSNumberFormatterDecimalStyle];
  NSString* formatted = [formatter stringFromNumber:number];
  [formatter release];
  return formatted;
}

- (NSString*)parse:(NSString*)text {

  _strings = [[NSMutableArray alloc] init];

  NSString*     document  = [NSString stringWithFormat:@"<x>%@</x>", text];
  NSData*       data      = [document dataUsingEncoding:text.fastestEncoding];
  NSXMLParser*  parser    = [[NSXMLParser alloc] initWithData:data];
  parser.delegate = self;
  [parser parse];
  TT_RELEASE_SAFELY(parser);

  NSString* result = [_strings componentsJoinedByString:@""];
  TT_RELEASE_SAFELY(_strings);

  return result;

}

 

验证元素是否在数组或对像的方法

///////////////////////////////////////////////////////////////////////////////////////////////////
BOOL TTIsArrayWithItems(id object) {
  return [object isKindOfClass:[NSArray class]] && [(NSArray*)object count] > 0;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
BOOL TTIsSetWithItems(id object) {
  return [object isKindOfClass:[NSSet class]] && [(NSSet*)object count] > 0;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
BOOL TTIsStringWithAnyText(id object) {
  return [object isKindOfClass:[NSString class]] && [(NSString*)object length] > 0;
}