Change the width of Master in UISplitViewController

Question

The iPad programming guide says that the splitView\'s left pane is fixed to 320 points. But 320 pixels for my master view controller is too much. I would like to reduce it a

Answer 1

The storyboard way would be this one, mentioned by @Tim:

Furthermore, if you want the Master view to always take up a certain percentage of the screen then you can use the Key Path = "preferredPrimaryColumnWidthFraction" instead and set the value to 0.2 (for 20% screen size).

Please note that the "maximumPrimaryColumnWidth" is set to 320, so if you try the screen percent value of 0.5 (50%) it won't go above 320. You can add a key path for maximumPrimaryColumnWidth if you need to override this.

Answer 2

Since no one mentioned that this can be done from IB, I want to add this answer. Apparently, you can set "User Defined Runtime Attributes" for the UISplitViewContorller with following details: Key Path:masterColumnWidth Type: Number Value: 250

Answer 3

Swift 3.0 you use like

let widthfraction = 2.0 //Your desired value for me 2.0    
splitViewController?.preferredPrimaryColumnWidthFraction = 0.40
let minimumWidth = min((splitViewController?.view.bounds.size.width)!,(splitViewController?.view.bounds.height)!)
splitViewController?.minimumPrimaryColumnWidth = minimumWidth / widthFraction
splitViewController?.maximumPrimaryColumnWidth = minimumWidth / widthFraction
let leftNavController = splitViewController?.viewControllers.first as! UINavigationController
leftNavController.view.frame = CGRect(x: leftNavController.view.frame.origin.x, y: leftNavController.view.frame.origin.y, width: (minimumWidth / widthFraction), height: leftNavController.view.frame.height)

Answer 4

This code work for me:)

@interface UISplitViewController(myExt) 
- (void)setNewMasterSize:(float)size; 
@end


@implementation UISplitViewController(myExt) 
- (void)setNewMasterSize:(float)size
{
    _masterColumnWidth = size;
}
@end

and use it on each operation with view (like rotation)

Answer 5

use the following code before assigning to the rootviewcontroller. It works for me with ios7

[self.splitViewController setValue:[NSNumber numberWithFloat:256.0] forKey:@"_masterColumnWidth"]; self.window.rootViewController = self.splitViewController;

Answer 6

ViewController.h @property(nonatomic, assign) CGFloat maximumPrimaryColumnWidth NS_AVAILABLE_IOS(8_0);

ViewController.m

#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)

    if (SYSTEM_VERSION_LESS_THAN(@"10.0")) {

    [self setValue:[NSNumber numberWithFloat:200.0]forKey:@"_masterColumnWidth"];

    }else{

    self.maximumPrimaryColumnWidth = 200;
    self.splitViewController.maximumPrimaryColumnWidth = self.maximumPrimaryColumnWidth;

     }