IOS开发实现密码生成器教程

UINavigationBar* bar = [[UINavigationBar alloc] init];
[self.view insertSubview:bar aboveSubview:self.infomationViewController.view];

UINavigationItem* item = [[UINavigationItem alloc] initWithTitle:@"About Password Generator"];
[bar pushNavigationItem:item animated:YES];

UIBarButtonItem* leftBarButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(SwitchView)];
UIBarButtonItem* rightBarButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(SwitchView)];

item.leftBarButtonItem = leftBarButton;
item.rightBarButtonItem = rightBarButton;

//
//  ViewController.m
//  PasswordGenerator
//
//  Created by arbboter on 14/12/23.
//  Copyright (c) 2014ๅนด arbboter. All rights reserved.
//

#import "ViewController.h"
#import "MainViewController.h"
#import "InfomationViewController.h"

@interface ViewController ()

@property(nonatomic, retain) UIButton* infomationButton;
@property(nonatomic, retain) MainViewController* mainViewController;
@property(nonatomic, retain) InfomationViewController* infomationViewController;
@property (nonatomic, retain) UINavigationBar* navagationBar;
@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    [self SwitchView];
}

- (void) onInfomationView
{

    InfomationViewController* viewController = [[InfomationViewController alloc] init];
    self.infomationViewController = viewController;
    [self.view addSubview:viewController.view];
    [viewController release];

    UINavigationBar* bar = [[UINavigationBar alloc] init];
    [self.view insertSubview:bar aboveSubview:self.infomationViewController.view];
    self.navagationBar = bar;
    [bar release];

    UINavigationItem* item = [[UINavigationItem alloc] initWithTitle:@"About Password Generator"];
    [bar pushNavigationItem:item animated:YES];
    UIBarButtonItem* leftBarButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(SwitchView)];
    UIBarButtonItem* rightBarButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(SwitchView)];

    item.leftBarButtonItem = leftBarButton;
    item.rightBarButtonItem = rightBarButton;

    [item release];
    [leftBarButton release];
    [rightBarButton release];
}

- (void) removeInfomationView
{
    [_infomationViewController.view removeFromSuperview];
    [_infomationViewController release];
    _infomationViewController = nil;

    [_navagationBar removeFromSuperview];
    [_navagationBar release];
    _navagationBar = nil;

}

- (void) SwitchView
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.0f];

    if ([self.infomationButton superview])
    {
        [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.view cache:YES];
        [self removeMainView];
        [UIView commitAnimations];
        [self onInfomationView];
    }
    else
    {
        [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view cache:YES];
        [self removeInfomationView];
        [UIView commitAnimations];
        [self onMainView];
    }
    [self reLayout];
}

- (void) removeMainView
{
    [_infomationButton removeFromSuperview];
    [_infomationButton release];
    _infomationButton = nil;
    [_mainViewController.view removeFromSuperview];
    [_mainViewController release];
    _mainViewController = nil;
}

- (void) onMainView
{
    UIButton* button = [UIButton buttonWithType:UIButtonTypeInfoDark];
    [self.view addSubview:button];
    [button addTarget:self action:@selector(SwitchView) forControlEvents:UIControlEventTouchUpInside];
    self.infomationButton = button;

    MainViewController* viewController = [[MainViewController alloc] init];
    [self.view insertSubview:viewController.view belowSubview:self.infomationButton];
    self.mainViewController = viewController;
    [viewController release];
}

- (void) reLayout
{
    CGPoint origin = self.view.frame.origin;
    CGSize size = self.view.frame.size;

    CGFloat w = 40;
    CGFloat h = 40;
    CGFloat yMargin = 10;
    CGFloat xMargin = 10;
    CGFloat x = origin.x + size.width-2*xMargin-w;
    CGFloat y = origin.y + size.height - 2*yMargin - h;

    _navagationBar.frame = CGRectMake(origin.x, origin.y+20, size.width, 40);
    _infomationButton.frame = CGRectMake(x, y, w, h);
}

-(void) viewWillAppear:(BOOL)animated
{
    [self reLayout];
    [super viewWillAppear:animated];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void) dealloc
{
    [self removeInfomationView];
    [self removeMainView];
    [super dealloc];
}

@end

//
//  InfomationView.m
//  PasswordGenerator
//
//  Created by arbboter on 14/12/23.
//  Copyright (c) 2014年 arbboter. All rights reserved.
//

#import "InfomationView.h"

@interface InfomationView ()

@property (nonatomic, retain) UILabel* logoLabel;
@property (nonatomic, retain) UIImageView* bkImageView;

@end

@implementation InfomationView

- (id)init
{
    self = [super init];
    if(self == nil)
    {
        return self;
    }

    UILabel* label = nil;
    label = [[UILabel alloc] init];
    label.text = @"Copyright (c) 2014年 arbboter.";
    label.textAlignment = NSTextAlignmentCenter;
    self.logoLabel = label;
    [self addSubview:label];
    [label release];

    UIImageView* imageView = [[UIImageView alloc] init];
    imageView.image = [UIImage imageNamed:@"bk.jpg"];
    imageView.contentMode = UIViewContentModeScaleAspectFit;
    self.bkImageView = imageView;
    [self insertSubview:imageView belowSubview:self.logoLabel];
    [imageView release];

    return self;
}

- (void) reLayout
{
    CGPoint origin = self.frame.origin;
    CGSize size = self.frame.size;

    CGFloat yMargin = 10;
    CGFloat xMargin = 10;
    CGFloat w = size.width-2*xMargin;
    CGFloat h = 40;
    CGFloat x = origin.x + xMargin;
    CGFloat y = origin.y + size.height - 2*yMargin - h;

    _bkImageView.frame = self.frame;
    _logoLabel.frame = CGRectMake(x, y, w, h);

}

- (void) dealloc
{
    [_bkImageView release];
    [_logoLabel release];
    [super dealloc];
}
@end