HALayout

iOS上实现类似于Android的RelativeLayout/LinearLayout/FrameLayout
// 根布局容器，采用线性布局方式
//  采用block的目的是让代码有缩进，方便区分布局层级
//      block中的container = [LinearLayout layout]
//      block中的layout = rootView
UIView* rootView = [UIView build:self.view container:[LinearLayout layout] config:^(LinearLayout* container, MarginLayoutParams* params, UIView* layout) {
    // 设置容器方向
    container.orientation = VERTICAL;
    
    // 设置容器宽高
    params.width = MATCH_PARENT;
    params.height = WRAP_CONTENT;
    
    // 设置容器边距
    params.leftMargin = 10.0f;
    params.topMargin = 10.0f;
    params.rightMargin = 10.0f;
    params.bottomMargin = 10.0f;
    
    // 设置容器壁宽
    container.paddingLeft = 5.0f;
    container.paddingTop = 5.0f;
    container.paddingRight = 5.0f;
    container.paddingBottom = 5.0f;
    
    [layout setBackgroundColor:[UIColor greenColor]];
    
    // 这里是LinearLayoutParams类型的布局参数，原因是frameLayout的父容器是LinearLayout(参考Android的布局方式)
    UIView* frameLayout = [UIView build:layout container:[FrameLayout layout] config:^(FrameLayout* container, LinearLayoutParams* params, UIView* layout) {
        params.width = MATCH_PARENT;
        params.height = 100.f;
        
        // 设置容器边距
        params.leftMargin = 10.0f;
        params.topMargin = 10.0f;
        params.rightMargin = 10.0f;
        params.bottomMargin = 10.0f;
        
        [layout setBackgroundColor:[UIColor yellowColor]];
        
        // 这里是FrameLayoutParams类型的布局参数，原因是button的父容器是FrameLayout
        UIButton* button = [UIButton build:layout config:^(FrameLayoutParams* params, UIButton* layout) {
            params.width = 100.0f;
            params.height = 50.0f;
            
            params.leftMargin = 20.0f;
            params.topMargin = 20.0f;
            
            [layout setBackgroundColor:[UIColor greenColor]];
            [layout setTitle:@"按钮" forState:UIControlStateNormal];
        }];
    }];
    
    UIView* relativeLayout = [UIView build:layout container:[RelativeLayout layout] config:^(RelativeLayout* container, LinearLayoutParams* params, UIView* layout) {
        // 设置容器宽高
        params.width = MATCH_PARENT;
        params.height = WRAP_CONTENT;
        
        // 设置容器边距
        params.leftMargin = 10.0f;
        params.topMargin = 10.0f;
        params.rightMargin = 10.0f;
        params.bottomMargin = 10.0f;
        
        // 设置容器壁宽
        container.paddingLeft = 5.0f;
        container.paddingTop = 5.0f;
        container.paddingRight = 5.0f;
        container.paddingBottom = 5.0f;
        
        [layout setBackgroundColor:[UIColor yellowColor]];
        
        UIButton* button = [UIButton build:layout config:^(RelativeLayoutParams* params, UIButton* layout) {
            params.width = 100.0f;
            params.height = 50.0f;
            
            params.leftMargin = 20.0f;
            params.topMargin = 20.0f;
            
            [layout setBackgroundColor:[UIColor greenColor]];
            [layout setTitle:@"按钮" forState:UIControlStateNormal];
        }];
        
        UILabel* label1 = [UILabel build:layout config:^(RelativeLayoutParams* params, UILabel* layout) {
            params.width = WRAP_CONTENT;
            params.height = WRAP_CONTENT;
            
            // 与button上对齐
            params.alignTop = button;
            
            // 在button的右边
            params.rightOf = button;
            
            // 距button 20 dp
            params.leftMargin = 20.0f;
            
            
            [layout setText:@"label1"];
        }];
        
        UILabel* label2 = [UILabel build:layout config:^(RelativeLayoutParams* params, UILabel* layout) {
            params.width = WRAP_CONTENT;
            params.height = WRAP_CONTENT;
            
            // 在父容器的右侧
            params.alignParentRight = YES;
            
            // 距父容器的右侧20dp
            params.rightMargin = 20.0f;
            
            // 与button上对齐
            params.alignTop = button;
            
            [layout setText:@"label2"];
        }];
        
        UIImageView* image = [UIImageView build:layout config:^(RelativeLayoutParams* params, UIImageView* layout) {
            params.width = WRAP_CONTENT;
            params.height = WRAP_CONTENT;
            
            // 在button的下面
            params.belowOf = button;
            
            // 距button 20 dp
            params.leftMargin = 20.0f;
            
            // 距button上侧距离20dp
            params.topMargin = 20.0f;
            
            [layout setImage:[UIImage imageNamed:@"icon.png"]];
        }];
        
        UIImageView* centerImage = [UIImageView build:layout config:^(RelativeLayoutParams* params, UIImageView* layout) {
            params.width = WRAP_CONTENT;
            params.height = WRAP_CONTENT;
            
            // 在父容器的中间位置
            params.centerVertical = YES;
            params.centerHorizontal = YES;
            
            [layout setImage:[UIImage imageNamed:@"icon.png"]];
        }];
        
    }];
}];

// 布局
[rootView requestLayout];
PatShen/HALayout

HALayout
