CGSize mLblHieht = [myString
sizeWithFont:[UIFontfontWithName:@"Arial"size:TEXT_FONT_SIZE]
constrainedToSize:CGSizeMake(280,100)
lineBreakMode:UILineBreakModeWordWrap];
UILabel必须设置的属性:
m_StarsLabel.numberOfLines = 0;
m_StarsLabel.lineBreakMode = UILineBreakModeCharacterWrap;
返回的mLblHieht即为UILabel的CGSize