How to change the Alpha Of an image

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+ (UIImage *) setImage:(UIImage *)image withAlpha:(CGFloat)alpha{ // Create a pixel buffer in an easy to use format CGImageRef imageRef = [image CGImage]; NSUInteger width = CGImageGetWidth(imageRef); NSUInteger height = CGImageGetHeight(imageRef); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); UInt8 * m_PixelBuf = malloc(sizeof(UInt8) * height * width * 4); NSUInteger bytesPerPixel = 4; NSUInteger… Read more »

How to remove selected string between parenthesis in xcode

Hi if you got a string which contains comment between some special characters then you can use – (NSString *)stringFilter:(NSString *)targetString {          NSScanner *theScanner;     NSString *text = nil;          theScanner = [NSScanner scannerWithString: targetString];          while ([theScanner isAtEnd] ==… Read more »

Change Customize UITextfield placeholder text in XCode

HI to change the color of UITextfield placeholder text there are three approaches 1. Override the drawPlaceholderInRect:(CGRect)rect  – (void) drawPlaceholderInRect:(CGRect)rect {     [[UIColor <your color>] setFill];     [[self placeholder] drawInRect:rect withFont:[UIFont systemFontOfSize:10]]; } 2.Access the private iVar(risky apple might not approve)     [self.password setValue:[UIColor colorWithRed:(160/255) green:(97/255) blue:(5/255) alpha:1]forKeyPath:@”_placeholderLabel.textColor”];   3.Its… Read more »

Finding XCode errors due to deallocated instances

There is nothing more irritating then the msg( debugger console) that are like this; -[NSFetchedResultsController class]: message sent to deallocated instance <some ddress> In order to track the erros which occur when you access the deallocated instance of an object All you need to do is few changes in environment variables step 1.Go to edit schemes… Read more »