UIlabel中的自动调节宽高
deltext.backgroundColor=[UIColor whiteColor];
[deltext setNumberOfLines:0];
[deltext setTextAlignment:NSTextAlignmentLeft];
UIFont *font = [UIFont fontWithName:@"Arial" size:16];
CGRect rectdel=[deltext.text boundingRectWithSize:CGSizeMake(scrollview.frame.size.width-20, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:font} context:nil];
//设置最大行数
deltext.numberOfLines=0;
deltext.frame=CGRectMake(0,imageview.frame.origin.y+imageview.frame.size.height, rectdel.size.width+20, rectdel.size.height+20);
调节出来的效果没加20之前只有一半