Method _prepareHeader

packages/core/ui/list-view/index.ios.ts:870–949

(headerCell: ListViewHeaderCell, section: number)

	}

	public _prepareHeader(headerCell: ListViewHeaderCell, section: number): number {
		let headerHeight: number;
		try {
			this._preparingHeader = true;
			let view: View = headerCell.view;
			if (!view) {
				view = this._getHeaderTemplate();
				if (!view) {
					if (Trace.isEnabled()) {
						Trace.write(`ListView: Failed to create header view for section ${section}`, Trace.categories.Debug);
					}
					// Create a fallback view
					const lbl = new Label();
					lbl.text = `Section ${section}`;
					view = lbl;
				}
			}

			// Handle header cell reuse
			if (!headerCell.view) {
				headerCell.owner = new WeakRef(view);
			} else if (headerCell.view !== view) {
				// Remove old view and set new one
				(<UIView>headerCell.view.nativeViewProtected)?.removeFromSuperview();
				this._removeHeaderContainer(headerCell);
				headerCell.owner = new WeakRef(view);
			}

			// Clear existing binding context and set new one
			if (view.bindingContext) {
				view.bindingContext = null;
			}

			if (this.sectioned) {
				const sectionData = this._getSectionData(section);
				if (sectionData) {
					view.bindingContext = sectionData;
				} else {
					// Fallback if section data is missing
					view.bindingContext = { title: `Section ${section}`, section: section };
				}
			} else {
				view.bindingContext = this.bindingContext;
			}

			// Force immediate binding context evaluation
			if (view && typeof (view as any)._onBindingContextChanged === 'function') {
				(view as any)._onBindingContextChanged(null, view.bindingContext);

				// Also trigger for child views
				// @ts-ignore
				if (view._childrenCount) {
					view.eachChildView((child) => {
						if (typeof (child as any)._onBindingContextChanged === 'function') {
							(child as any)._onBindingContextChanged(null, view.bindingContext);
						}
						return true;
					});