label动态算高

-(CGRect)labelFit:(NSString *)labelText UILabel:(UILabel *)label Frame:(CGRect)frame

{

[label setNumberOfLines:0];

label.lineBreakMode=UILineBreakModeCharacterWrap;

UIFont *font=[UIFont systemFontOfSize:16];

CGSize size=CGSizeMake(frame.size.width, 1000);

CGSize labelSize=[labelText sizeWithFont:font constrainedToSize:size lineBreakMode:UILineBreakModeCharacterWrap];

labelSize.width=frame.size.width;

CGRect rect=CGRectMake(frame.origin.x, frame.origin.y, labelSize.width, labelSize.height);

return rect;

}