Using Fixed Rows and Columns

Operating system requirements: iOS 5.0 or later.

Mobile device: iPad.

Description

This example describes the use of fixed table rows and columns. After starting the example the following operations are executed:

Table row is fixed.
Table column is fixed.
Table width and height are changed.

Source Code

Executing the example requires to place the following code instead of the executeExample and viewDidAppear: method of the ViewController class (see the Creating a Simple Data Grid section):

-(void) executeExample {
    // Fix row
    [proxyDatasource gridView:[contr gridView] fixRow:2];
    // Fix column
    [proxyDatasource gridView:[contr gridView] fixColumn:1];
};
- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    // Set table size
    [[contr gridView] setFrame:CGRectMake(0, 0, 300, 200)];
}
// Get table size before their change
- (void)gridView:(NuGridView *)gridView beforeFrameChangeFrom:(CGRect)fromFrame toFrame:(CGRect)toFrame {
    NSLog(@"Old width: %f, height: %f", fromFrame.size.width, fromFrame.size.height);
}
// Get table size after their change
- (void)gridView:(NuGridView *)gridView afterFrameChangeFrom:(CGRect)fromFrame toFrame:(CGRect)toFrame {
    NSLog(@"New width: %f, height: %f", toFrame.size.width, toFrame.size.height);
}

After executing the example the row with the number 2 and the column with the number 1 are fixed, table width is 300 pixels, table height is 200 pixels. On scrolling the table contents right and down, the fixed rows and columns do not change their position:

The development environment console displays table size before and after their change:

Old width: 0.000000, height: 0.000000

New width: 300.000000, height: 200.000000