Tuesday, June 11, 2013

UIToolbar setItems example in Objective C (iOS).

UIToolbar setItems

Sets the items on the toolbar by animating the changes.

- (void)setItems:(NSArray *)items animated:(BOOL)animated

Parameters of [UIToolbar setItems]
The items to display on the toolbar.
A Boolean value if set to YES animates the transition to the items; otherwise, does not.

Discussion of [UIToolbar setItems]
If animated is YES, the changes are dissolved or the reordering is animated—for example, removed items fade out and new items fade in. This method also adjusts the spacing between items.

UIToolbar setItems example.
NSMutableArray *items = [[self.toolbar items] mutableCopy];

UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[items addObject:spacer];
[spacer release];

self.titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0 , 11.0f, self.view.frame.size.width, 21.0f)];
[self.titleLabel setFont:[UIFont fontWithName:@"Helvetica-Bold" size:18]];
[self.titleLabel setBackgroundColor:[UIColor clearColor]];
[self.titleLabel setTextColor:[UIColor colorWithRed:157.0/255.0 green:157.0/255.0 blue:157.0/255.0 alpha:1.0]];
[self.titleLabel setText:@"Title"];
[self.titleLabel setTextAlignment:UITextAlignmentCenter];

UIBarButtonItem *spacer2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[items addObject:spacer2];
[spacer2 release];

UIBarButtonItem *title = [[UIBarButtonItem alloc] initWithCustomView:self.titleLabel];
[items addObject:title];
[title release];

[self.toolbar setItems:items animated:YES];
[items release];

Example of [UIToolbar setItems].
- (void)viewDidLoad {
[super viewDidLoad];// Add an invisible UIActivityViewIndicator to the toolbar
UIToolbar *toolbar = (UIToolbar *)[self.view viewWithTag:767];
NSArray *items = [toolbar items];

activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 20.0f, 20.0f)];
[activityIndicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhite];

NSArray *newItems = [NSArray arrayWithObjects:[items objectAtIndex:0],[items objectAtIndex:1],[items objectAtIndex:2],
 [[UIBarButtonItem alloc] initWithCustomView:activityIndicator], [items objectAtIndex:3],nil];
[toolbar setItems:newItems];}

UIToolbar setItems example.
UIToolbar *toolbar = [[UIToolbar alloc] init];
toolbar.frame = CGRectMake(0, 0, self.view.frame.size.width, 45);
NSMutableArray *items = [[NSMutableArray alloc] init];
[items addObject:[[UIBarButtonItem alloc] initWithObjects...]];
[toolbar setItems:items animated:NO];
[self.view addSubview:toolbar];

End of UIToolbar setItems example article.