从零开始iOS8编程【iOS开发常用控件】

-(IBAction)testAlert {
	
	NSString *str = [[NSString alloc] initWithFormat:@"Hello, %@",txtField.text];
	
	UIAlertView *alert = [[UIAlertView alloc]
						  initWithTitle:@"提示" message:str
						  delegate:self
						  cancelButtonTitle:@"Ok"
						  otherButtonTitles:nil];
	
	[str release];
	
	[alert show];
	[alert release];
    
}

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
	NSLog(@"%@",@"Ok" );
}

@interface HelloHaoMengZhuViewController : UIViewController
{
    UITextField *txtField;
    UIActivityIndicatorView * myActivityView;
    
    IBOutlet UIProgressView *Progress;
	NSTimer *timer;
}

-(IBAction)testActionSheet {
	
	NSString *str = [[NSString alloc] initWithFormat:@"Hello, %@",txtField.text];
	
	
	UIActionSheet *action = [[UIActionSheet alloc] initWithTitle:@"提示"
														delegate:self
											   cancelButtonTitle:@"取消"
										  destructiveButtonTitle:@"确定"
											   otherButtonTitles:nil];
	[str release];
	[action showInView:self.view];
	[action release];
    
}

- (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {
	
	if (buttonIndex == [actionSheet destructiveButtonIndex]) {
		NSLog(@"%@",@"确定" );
	} else if (buttonIndex == [actionSheet cancelButtonIndex]) {
		NSLog(@"%@",@"取消" );
	}
}

-(IBAction)onClickButton2: (id)sender {
	if ([myActivityView isAnimating]) {
		[myActivityView stopAnimating];
	} else {
		[myActivityView startAnimating];
	}
}

-(IBAction)start{
	Progress.progress = 0.0;
	timer = [NSTimer
			 scheduledTimerWithTimeInterval:1.0
			 target:self
			 selector:@selector(update)
			 userInfo:nil repeats:YES];
}

-(void)update{
	Progress.progress = Progress.progress + 0.1;
	if (Progress.progress == 1.0) {
		[timer invalidate];
		UIAlertView *alert = [[UIAlertView alloc]
							  initWithTitle:@"任务通知"
							  message:@"波多野结衣.avi 下载完成!"
							  delegate:self
							  cancelButtonTitle:@"OK"
							  otherButtonTitles:nil];
		[alert show];
		[alert release];
	}
}