Notes of a Developer » UI

Simple EKDemo – EKEvent

Vladimir Boychentsov — Sun, 06 Nov 2011 00:28:57 +0000

Now we have controller for creating events. This controller included from 4.0 iOS SDK.

The application uses table views to display EKCalendar object and EKEvent objects retrieved from an EKEventStore object. It implements EKEventViewController for viewing and editing existing EKEvents, and uses EKEventEditViewController for creating new EKEvents.

DDProgressView – Custom Progress View

Vladimir Boychentsov — Sat, 05 Nov 2011 15:47:23 +0000

DDProgressView is a custom progress view à la Twitter for iPhone.

DDProgressView works on both iOS and Mac OS. You must also compile the AppKitCompatibility.m file when targeting Mac OS.

Thanks, Damien DeVille!

My Custom UITextView with syntax highlighting

Vladimir Boychentsov — Sat, 05 Nov 2011 00:51:21 +0000

Small feature with UIlabel

Vladimir Boychentsov — Fri, 14 Jan 2011 22:24:44 +0000

Add framework QuartzCore

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#import

UILabel *label = [[UILabel alloc] init];
[label setTextColor:[UIColor whiteColor]];
[label setBackgroundColor:[UIColor darkGrayColor]];

[[label layer] setBorderWidth:2];
[[label layer] setCornerRadius:15];
[[label layer] setBorderColor:[UIColor whiteColor].CGColor];

[label setAlpha:0.8];
[label setTextAlignment:UITextAlignmentCenter];
[label setFrame:CGRectMake(0, 0, 220, 50)];
[label setText:@"Loading..."];
[label setCenter:window.center];
[window addSubview:label];

Result:

Sample usage UIDownloadBar

Vladimir Boychentsov — Wed, 20 Oct 2010 13:30:36 +0000

Hello

Copy UI for additiolan screen

Vladimir Boychentsov — Tue, 19 Oct 2010 23:04:49 +0000

Пример копирования объектов UI на дополнительный экран

Все очень просто, для копирования необходимо выполнить всего 2 метода.

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// copy UI
// archiving data
NSData *archivedData = [NSKeyedArchiver archivedDataWithRootObject: window];
//extract data
externalWindow = [[NSKeyedUnarchiver unarchiveObjectWithData:archivedData] retain];

Внимание: Интерфейс копируется только без картинок, если будут картинки, то получите креш. Так же скопированные объекты не синхронизированны.

Далее исходники и ролик демострирующий результат…

Source

Make gradient on iPhone/iPad

Vladimir Boychentsov — Sun, 30 May 2010 18:57:09 +0000

It’s easy! As of iPhone SDK 3.0, custom gradients can be implemented very easily, without subclassing or images, by using the new CAGradientLayer

add framework

1	#import < QuartzCore/QuartzCore.h>

so, example:

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UIView *myTabView = [[UIView alloc] initWithFrame:frame];
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = myTabView.bounds;
gradient.colors = [NSArray arrayWithObjects:
(id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
, (id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
, (id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
, (id)[[UIColor blackColor] CGColor]
, (id)[[UIColor blackColor] CGColor], nil];
[myTabView.layer insertSublayer:gradient atIndex:0];
[[self.tabBarController tabBar] insertSubview:myTabView atIndex:0];
[myTabView release];

Result:

or, nice example with use Core Graphics to draw the gradient

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- (void)drawRect:(CGRect)rect
{
CGContextRef currentContext = UIGraphicsGetCurrentContext();

CGGradientRef glossGradient;
CGColorSpaceRef rgbColorspace;
size_t num_locations = 2;
CGFloat locations[2] = { 0.0, 1.0 };
CGFloat components[8] = { 1.0, 1.0, 1.0, 0.35, // Start color
1.0, 1.0, 1.0, 0.06 }; // End color

rgbColorspace = CGColorSpaceCreateDeviceRGB();
glossGradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);

CGRect currentBounds = self.bounds;
CGPoint topCenter = CGPointMake(CGRectGetMidX(currentBounds), 0.0f);
CGPoint midCenter = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMidY(currentBounds));
CGContextDrawLinearGradient(currentContext, glossGradient, topCenter, midCenter, 0);

CGGradientRelease(glossGradient);
CGColorSpaceRelease(rgbColorspace);
}

Many documentations

resource