小数点后两位有数字则保留，为0则不显示

-(NSString *)formatFloat:(float)f{

    if(fmodf(f,1) ==0) {

        return [NSString stringWithFormat:@"%.0f",f];

    }elseif(fmodf(f*10,1) ==0) {

        return [NSString stringWithFormat:@"%.1f",f];

    }else{

        return [NSString stringWithFormat:@"%.2f",f];

    }

}

   if ([giftModel.gift_total_price floatValue] <= 0) {

        self.moneylabel.text = @"0";

    }else{

        self.moneylabel.text = [NSString stringWithFormat:@"%@",[self formatFloat:([giftModel.gift_total_price floatValue])]];

    }