新文本字段的默认属性

align = "left"
blockIndent = 0
bold = false
bullet = false
color = 0x000000
font = "Times New Roman" (default font is Times on Mac OS X)
indent = 0
italic = false
kerning = false
leading = 0
leftMargin = 0
letterSpacing = 0
rightMargin = 0
size = 12
tabStops = [] (empty array)
target = ""
underline = false
url = ""