iOS 多个不同宽度button布局自动换行

mark下需要循环布局不同宽度button的情况，根据button宽度自动换行。

#pragma mark - 多个不同宽度button自动换行-(void)createViewWithTitleArr{    UIView *bgView = [[UIView alloc] initWithFrame:CGRectMake(0, 250, WID, 45)];    bgView.backgroundColor = [UIColor cyanColor];    [self.view addSubview:bgView];        NSArray *titleAry = @[@"安徽发克鲁斯",                          @"啥就开始打开",                          @"等哈说楼房吉安老师发货啦",                          @"盛开的花",                          @"就发生；楼房吉安；十分骄傲；十分骄傲；是否"];    CGFloat pointX = 10.0; //button X坐标    CGFloat pointY = 10.0; //button Y坐标    CGFloat padding = 5.0; //button 间距    CGFloat btnHeight = 30; //button高度    CGFloat allWidth = WID - 10;    UIFont *titleFont = [UIFont systemFontOfSize:15];    for (int i = 0; i < titleAry.count; i++) {        CGRect rect = [titleAry[i] boundingRectWithSize:CGSizeMake(MAXFLOAT, 30) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName : titleFont} context:nil];        CGFloat btnWidth = rect.size.width + 20;                if (pointX + btnWidth > allWidth) {//换行            pointX = 10;//X从新开始            pointY += (btnHeight + padding);//换行后Y+        }        UIButton *but = [UIButton buttonWithType:UIButtonTypeCustom];        but.frame = CGRectMake(pointX, pointY, btnWidth, btnHeight);        but.tag = i + 1000;        [but addTarget:self action:@selector(clickButtonAction:) forControlEvents:UIControlEventTouchUpInside];        but.layer.masksToBounds = YES;        but.layer.cornerRadius = btnHeight/2;        but.layer.borderWidth = 1;        but.layer.borderColor = [UIColor magentaColor].CGColor;        [but setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];        [but setTitle:titleAry[i] forState:UIControlStateNormal];        but.titleLabel.font = titleFont;//一定要一样        pointX += (btnWidth + padding);//每次X都加上button宽和间距5                [bgView addSubview:but];    }    CGRect rect2 = bgView.frame;    rect2.size.height = pointY + btnHeight + 10;    bgView.frame = rect2;}-(void)clickButtonAction:(UIButton *)sender{    if (sender.selected) {        return;    }    _tempButton.selected = NO;    _tempButton.backgroundColor = [UIColor clearColor];    sender.selected = YES;    sender.backgroundColor = [UIColor magentaColor];    _tempButton = sender;}