霓虹燈動態效果,限定文本框的輸如長度

//
//  CCLAppDelegate.m
//  TestNeonLamp
//
//  Created by lanouhn on 14-8-19.
//  Copyright (c) 2014年 [email protected] 陳聰雷. All rights reserved.
//

#import "CCLAppDelegate.h"

@interface CCLAppDelegate ()
{
    UIView *_backgroundView;
    NSArray *_array;
}
@end

@implementation CCLAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    
    self.window.backgroundColor = [UIColor whiteColor];
    //背景視圖
    [self creatBGView];
    //霓虹燈視圖
    [self creatNeonLamp];
    //定時器
    [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(change) userInfo:nil repeats:YES];
    //限制輸入框的文本長度
//    [self creatTextField];
    
    [self.window makeKeyAndVisible];
    return YES;
}

//背景視圖
- (void)creatBGView
{
    _backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 568)];
    _backgroundView.backgroundColor = [UIColor whiteColor];
    [self.window addSubview:_backgroundView];
    [_backgroundView release];
}

//霓虹燈視圖
- (void)creatNeonLamp
{
    //指定顏色
    _array = [NSArray arrayWithObjects:[UIColor redColor], [UIColor orangeColor], [UIColor yellowColor], [UIColor greenColor], [UIColor blueColor], [UIColor cyanColor], [UIColor purpleColor], nil];
    for (int i = 0; i < 7; i++) {
        UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0 + 24 * i, 0 + 24 * i, 320 - 48 * i, 568 - 48 * i)];
        //色相, 飽和度, 亮度
        /*
         CGFloat color = (arc4random() % 256 / 255.0 );
         CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5;
         CGFloat brightness = ( arc4random() % 128 / 256.0 ) + 0.5;
         view.backgroundColor = [UIColor colorWithHue:color saturation:saturation brightness:brightness alpha:1];
         */
        //RGB
        /*
        CGFloat red = arc4random() % 256 /255.0;
        CGFloat green = arc4random() % 256 /255.0;
        CGFloat blue = arc4random() % 256 /255.0;
        view.backgroundColor = [UIColor colorWithRed:red green:green blue:blue alpha:1];
         */
        view.backgroundColor = _array[i];
        view.tag = 100 + i;
        [_backgroundView addSubview:view];
        [view release];
    }
    
}

- (void)change
{

    NSArray *arr = [NSArray arrayWithObjects:[UIColor redColor], [UIColor orangeColor], [UIColor yellowColor], [UIColor greenColor], [UIColor blueColor], [UIColor cyanColor], [UIColor purpleColor], nil];
    
    static int i = 0;
    
    for (int j = 0; j < 7 - i; j++) {
        UIView *view = (UIView *)[_backgroundView viewWithTag:100 + j];
        view.backgroundColor = arr[j + i];
    }
    
    for (int j = 6 - i, k = 0; j < 7; j++, k++) {
        UIView *view = (UIView *)[_backgroundView viewWithTag:100 + j];
        view.backgroundColor = arr[k];
    }
    
    i++;
    if (i > 6) {
        i = 0;
    }
}

- (void)creatTextField
{
    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(80, 50, 160, 40)];
    textField.placeholder = @"限定5個字符";
    textField.clearButtonMode = UITextFieldViewModeWhileEditing; //編輯時會出現個修改X
    textField.layer.cornerRadius = 5;
    textField.borderStyle = UITextBorderStyleLine | UITextBorderStyleRoundedRect;
    textField.delegate = self;
    NSLog(@"%@", textField.text);
    [_backgroundView addSubview:textField];
    [textField release];
}

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    NSLog(@"textFieldShouldBeginEditing");
    textField.clearsOnBeginEditing = YES;
    textField.layer.borderColor = [UIColor orangeColor].CGColor;
    textField.layer.borderWidth = 1;
    return YES;
}// return NO to disallow editing.
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    
}// became first responder
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
    NSLog(@"textFieldShouldEndEditing");
    textField.layer.borderColor = [UIColor greenColor].CGColor;
    textField.layer.borderWidth = 1;
    return YES;
}// return YES to allow editing to stop and to resign first responder status. NO to disallow the editing session to end
- (void)textFieldDidEndEditing:(UITextField *)textField
{
    
}// may be called if forced even if shouldEndEditing returns NO (e.g. view removed from window) or endEditing:YES called

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    NSLog(@"%@", NSStringFromRange(range));
    NSLog(@"%@", string);
    NSString * aString = [textField.text stringByReplacingCharactersInRange:range withString:string];
    if (aString.length > 5) {
        textField.text = [aString substringToIndex:5];
        UIAlertView *alert = [[UIAlertView alloc]
                              initWithTitle:nil
                              message:@"超過最大字數不能輸入了"
                              delegate:nil
                              cancelButtonTitle:@"Ok"
                              otherButtonTitles:nil, nil];
        [alert show];
        [alert release];
        return NO;
    }
    
    return YES;

}// return NO to not change text

- (BOOL)textFieldShouldClear:(UITextField *)textField
{
    textField.text = @"";
    return YES;
}// called when clear button pressed. return NO to ignore (no notifications)

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application
{
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application
{
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

- (void)dealloc
{
    [_window release];
    [super dealloc];
}

@end