Masonry 使用注意

1,如何打印 frame

    UIView *view = [[UIView alloc]initWithFrame:CGRectZero];
    view.backgroundColor = [UIColor yellowColor];
    [self.view addSubview:view];
    
    [view  mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.mas_equalTo(10);
        make.top.mas_equalTo(10);
        make.width.mas_equalTo(100);
        make.height.mas_equalTo(20);
    }];
    
    [view layoutIfNeeded];
    NSLog(@"%f",view.yj_height);

2，UIScrollView 如何 使用 masnory

    UIScrollView *scrollView = [[UIScrollView alloc]init];
    scrollView.backgroundColor = [UIColor orangeColor];
    scrollView.pagingEnabled =YES;
    // 添加scrollView添加到父视图，并设置其约束
    [self.view addSubview:scrollView];
    [scrollView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.and.left.mas_equalTo(10);
        make.right.mas_equalTo(-10);
        make.height.mas_equalTo(100);
    }];
    // 设置scrollView的子视图，即过渡视图contentSize，并设置其约束
    UIView *contentView = [[UIView alloc]init];
    [scrollView addSubview:contentView];
    [contentView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(scrollView);
        make.height.equalTo(scrollView);
    }];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.backgroundColor = [UIColor purpleColor];
    [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
    [contentView addSubview:button];

    [button mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.and.bottom.equalTo(scrollView);
        make.width.equalTo(scrollView);
        make.left.mas_equalTo(0);
    }];
    
    UIView *view = [[UIView alloc]initWithFrame:CGRectZero];
    view.backgroundColor = [UIColor blueColor];
    [scrollView addSubview: view];
    
    [view mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.and.bottom.equalTo(scrollView);
        make.width.equalTo(scrollView);
        make.left.equalTo(button.mas_right);
    }];
    // 设置过渡视图的右距（此设置将影响到scrollView的contentSize）
    [contentView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.right.mas_equalTo(view.mas_right);
    }];
    

3，利用 masonry 使tableview cell 高度自适应文本

1>
// 必须要给cell高度估计值
_table.estimatedRowHeight = 175;

2>

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
 return 60;
}

这个方法不要设置

3>在cell 中用masonry设置

    UILabel *titleLab  = [[UILabel alloc]initWithFrame:CGRectZero];
    titleLab.text = @"姓名sasaadsasdmmm姓名asaadsasdmm姓名asaadsasdm姓名asaadsasdm姓名asaadsasdm姓名asaadsasdm姓名asaadsasdm姓名asaadsasdm姓名asaadsasdm姓名asaadsasdm姓名asaadsasdm姓名asaadsasd";
    titleLab.textColor = UIColorFromRGB(0x4b4b4b);
    titleLab.textAlignment = NSTextAlignmentLeft;
    titleLab.font = [UIFont systemFontOfSize:15];
    [self.contentView addSubview:titleLab];
    titleLab.numberOfLines = 0;
    
    _titleLab = titleLab;


    CGFloat  kPadding = 10;
    [_titleLab mas_makeConstraints:^(MASConstraintMaker *make) {
        
        make.top.mas_equalTo(kPadding);
        make.left.mas_equalTo(kPadding);
        make.right.mas_equalTo(-kPadding);
        make.bottom.mas_equalTo(-kPadding);
        
        
    }];

注意这样写 不能在layoutSubviews 方法中设置 layout！！！