摘要： UIFont*font=[UIFontsystemFontOfSize:12]; CGSizesize=[textsizeWithFont:fontconstrainedToSize:CGSizeMake(150.0f,1000.0f)lineBreakMode:UILineBreakModeCharacterWrap];获取字符串在指定的size内(宽度超过150,则换行)所需的的实际高度和宽度.将获取的宽度和高度用于UILabelUILabel*bubbleText=[[UILabelalloc]initWithFrame:CGRectMake(21.0f,14.0f,size.width 阅读全文