How i set the background color in UIView using CGContext?
- by Rajendra Bhole
Hi,
I have developed the application in which i want to set the background color of UIView which is already set on UIViewController.The code is below,
@implementation frmGraphView
/*
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Custom initialization
}
return self;
}
*/
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame])
{
// Initialization code
}
return self;
}
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (void)drawRect:(CGRect)rect
{
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextClearRect(ctx, rect);
//CGContextSetCMYKFillColor(ctx, 35.0, 56.0, 34.0, 30.0, 1.0);
//CGContextSetRGBFillColor(ctx, 92.0f, 95.0f, 97.0f, 1.0f);
//CGContextFillRect(ctx, CGRectMake(0, 0, 300, 280));
CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0);
CGContextSetLineWidth(ctx, 2.0);
float fltX1,fltX2,fltY1,fltY2=0;
NSArray *hoursInDays = [[NSArray alloc] initWithObjects:@"0",@"1" ,@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12", nil];
fltX1 = 30;
fltY1 = 5;
fltX2 = fltX1;
fltY2 = 270;
//Dividing the Y-axis
CGContextMoveToPoint(ctx, fltX1, fltY1);
CGContextAddLineToPoint(ctx, fltX2, fltY2);
//float y = 275;
for(int intIndex = 0 ; intIndex < [hoursInDays count] ; fltY2-=20, intIndex++)
{
CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0);
CGContextMoveToPoint(ctx, fltX1-3 , fltY2);
CGContextAddLineToPoint(ctx, fltX1+3, fltY2);
CGContextSelectFont(ctx, "Helvetica", 14.0, kCGEncodingMacRoman);
CGContextSetTextDrawingMode(ctx, kCGTextFill);
CGContextSetRGBFillColor(ctx, 0, 255, 255, 1);
CGAffineTransform xform = CGAffineTransformMake(
1.0, 0.0,
0.0, -1.0,
0.0, 0.0);
CGContextSetTextMatrix(ctx, xform);
const char *arrayDataForYAxis = [[hoursInDays objectAtIndex:intIndex] UTF8String];
CGContextShowTextAtPoint(ctx, fltX1-18, fltY2-18 , arrayDataForYAxis, strlen(arrayDataForYAxis));
CGContextStrokePath(ctx);
}
CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0);
CGContextSetLineWidth(ctx, 2.0);
fltX1 = 5;
fltY1 = 250;
fltX2 = 270;
fltY2 = fltY1;
NSArray *weekDays =[[NSArray alloc] initWithObjects:@"Sun", @"Mon", @"Tus", @"Wed", @"Thu", @"Fri", @"Sat", nil];
//Dividing the X-axis
CGContextMoveToPoint(ctx, fltX1, fltY1);
CGContextAddLineToPoint(ctx, fltX2, fltY2);
//float y = 275;
for(int intIndex = 0 ; intIndex < [weekDays count] ; fltX1+=33, intIndex++)
{
CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0);
CGContextMoveToPoint(ctx, fltX1+52 , fltY2-3);
CGContextAddLineToPoint(ctx, fltX1+52, fltY2+3);
CGContextSelectFont(ctx, "Arial", 15.0, kCGEncodingMacRoman);
CGContextSetTextDrawingMode(ctx, kCGTextFill);
CGContextSetRGBFillColor(ctx, 0, 255, 255, 1);
CGAffineTransform xform = CGAffineTransformMake(
1.0, 0.0,
0.0, -1.0,
0.0, 0.0);
CGContextSetTextMatrix(ctx, xform);
const char *arrayDataForXAxis = [[weekDays objectAtIndex:intIndex] UTF8String];
CGContextShowTextAtPoint(ctx, fltX1+37, fltY2+18 , arrayDataForXAxis, strlen(arrayDataForXAxis));
CGContextStrokePath(ctx);
}
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
@end
