..:::Trio Hasim:::..: May 2012

Detect the specific device touch model

[[UIDevice currentDevice] platformType] // ex: UIDevice4GiPhone
[[UIDevice currentDevice] platformString] // ex: @"iPhone 4G"

Clear UIWebView content

[webView loadHTMLString:@"<html><head></head><body></body></html>" baseURL:nil];

Define Maximum Characters in Textfield

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSUInteger newLength = [textField.text length] + [string length] - range.length;
return (newLength > 80) ? NO : YES;
}

Change UITextField’s Placeholder Color

[self.MyTextField setValue:[UIColor darkGrayColor] forKeyPath:@"_placeholderLabel.textColor"];

Set Rounded Corner to Image

UIImageView * roundedView = [[UIImageView alloc] initWithImage: [UIImage imageNamed:@"wood.jpg"]];
// Get the Layer of any view
CALayer * l = [roundedView layer];
[l setMasksToBounds:YES];
[l setCornerRadius:10.0];

// You can even add a border
[l setBorderWidth:4.0];
[l setBorderColor:[[UIColor blueColor] CGColor]];

How to post Tweets with iOS5

Add Twitter framework to your project
#import "Twitter/TWTweetComposeViewController.h"
Add this code:

TWTweetComposeViewController *twitter = [[TWTweetComposeViewController alloc] init];

[twitter setInitialText:@"It's really that simple!"];

[twitter addImage:[UIImage imageNamed:@"twitter.png"]];

[self presentViewController:twitter animated:YES completion:nil];

twitter.completionHandler = ^(TWTweetComposeViewControllerResult res) {

if(res == TWTweetComposeViewControllerResultDone)

{

UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:@"Succes!" message:@"Your Tweet was posted succesfully" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

[alertView show];

}else if(res == TWTweetComposeViewControllerResultCancelled)

{

UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Your Tweet was not posted" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

[alertView show];

}

[self dismissModalViewControllerAnimated:YES];

};

Disable or Hide Button in UIActionSheet

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Share"
delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil
otherButtonTitles:@"Send Message (SMS)", @"Send E-Mail", @"Print", @"Twitter", nil];
[actionSheet showInView:self.view];
for(UIView *v in [actionSheet subviews])
{
if([[v description] hasPrefix: @"<UIThreePartButton"] )
{
if ([v respondsToSelector:@selector(title)])
{
NSString* title = [v performSelector:@selector(title)];
if ([title isEqualToString:@"Twitter"])
{
//v.hidden = YES;
((UIButton*)v).enabled = NO;
}
}
}
}
[actionSheet release];

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