AppDelegate.h



#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;


@end

AppDelegate.m



#import "AppDelegate.h"

@interface AppDelegate ()<UITextFieldDelegate>

@property(nonatomic, assign)BOOL isSelected;
@property(nonatomic, retain)UITextField *textField;

@end

@implementation AppDelegate

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

- (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];
    [self.window makeKeyAndVisible];
    [_window release];

    //   创建一个Button
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(100, 100, 150, 50);
    button.backgroundColor = [UIColor yellowColor];
    [self.window addSubview:button];
    //  Button用便利构造器创建, 不需要释放

    //  添加边框, 添加弧度
    button.layer.borderWidth = 1;
    button.layer.cornerRadius = 10;

    //  添加一个标题
    [button setTitle:@"确认" forState:UIControlStateNormal];
    //  修改字体大小
    button.titleLabel.font = [UIFont systemFontOfSize:25];
    //  修改颜色
    [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

    //  绑定一个点击方法
    [button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];

    //  创建一个textField
    self.textField = [[UITextField alloc] initWithFrame:CGRectMake(100, 200, 150, 50)];
    self.textField.layer.borderWidth = 1;
    self.textField.layer.cornerRadius = 10;
    [self.window addSubview:self.textField];
    [_textField release];
    self.textField.secureTextEntry = YES;

    //  设置代理人
    self.textField.delegate = self;





    return YES;
}

//  点击return, 回收键盘
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    NSLog(@"1111111");
    //  失去第一响应者
    [textField resignFirstResponder];
    return YES;
}




- (void)click:(UIButton *)button {
    if ([button.currentTitle isEqualToString:@"确认"]) {
        NSLog(@"%@", self.textField.text);
        [button setTitle:@"取消" forState:UIControlStateNormal];
    } else {
        [button setTitle:@"确认" forState:UIControlStateNormal];
    }

    self.textField.secureTextEntry = !self.textField.secureTextEntry;

}

    
　第一、UIButton的定义
　　UIButton *button=[[UIButton buttonWithType:(UIButtonType);
　　能够定义的button类型有以下6种，
　　typedef enum {
　　UIButtonTypeCustom = 0, 自定义风格
　　UIButtonTypeRoundedRect, 圆角矩形
　　UIButtonTypeDetailDisclosure, 蓝色小箭头按钮，主要做详细说明用
　　UIButtonTypeInfoLight, 亮色感叹号
　　UIButtonTypeInfoDark, 暗色感叹号
　　UIButtonTypeContactAdd, 十字加号按钮
　　} UIButtonType;
　　第二、设置frame
　　button1.frame = CGRectMake(20, 20, 280, 40);
　　[button setFrame:CGRectMake(20,20,50,50)];
　　第三、button背景色
　　button1.backgroundColor = [UIColor clearColor];
　　[button setBackgroundColor:[UIColor blueColor]];
　　第四、state状态
　　forState: 这个参数的作用是定义按钮的文字或图片在何种状态下才会显现
　　enum {
　　UIControlStateNormal = 0, 常规状态显现
　　UIControlStateHighlighted = 1 << 0, 高亮状态显现
　　UIControlStateDisabled = 1 << 1, 禁用的状态才会显现
　　UIControlStateSelected = 1 << 2, 选中状态
　　UIControlStateApplication = 0x00FF0000, 当应用程序标志时
　　UIControlStateReserved = 0xFF000000 为内部框架预留，可以不管
　　};
　　@property(nonatomic,getter=isEnabled)BOOL enabled; // default is YES. if NO, ignores touch events and subclasses may draw differently
　　@property(nonatomic,getter=isSelected)BOOL selected; // default is NO may be used by some subclasses or by application
　　@property(nonatomic,getter=isHighlighted)BOOL highlighted;
　　第五 、设置button填充图片和背景图片
　　[buttonsetImage:[UIImageimageNamed:@"checkmarkControllerIcon"]forState:UIControlStateNormal];
　　[buttonsetBackgroundImage:[UIImageimageNamed:@"checkmarkControllerIcon"]forState:UIControlStateNormal];
　　第六、设置button标题和标题颜色
　　[button1 setTitle:@"点击" forState:UIControlStateNormal];
　　[buttonsetTitleColor:[UIColorredColor]forState:UIControlStateNormal];
　　第七、设置按钮按下会发光
　　button.showsTouchWhenHighlighted=NO;
　　第八、添加或删除事件处理
　　[button1 addTarget:self action:@selector(butClick:) forControlEvents:UIControlEventTouchUpInside];
　　[btn removeTarget:nil action:nil forControlEvents:UIControlEventTouchUpInside];
　　第九、 设置按钮内部图片间距和标题间距
　　UIEdgeInsets insets; // 设置按钮内部图片间距
　　insets.top = insets.bottom = insets.right = insets.left = 10;
　　bt.contentEdgeInsets = insets;
　　bt.titleEdgeInsets = insets; // 标题间距
 
//
网络附加：
UIButton *btnTemp = [UIButtonbuttonWithType:UIButtonTypeCustom];
深度定制一个按钮


UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeCustom];
    btn1.frame = CGRectMake(0, 0, 200, 140);
    btn1.center = CGPointMake(180, 215);
    btn1.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
    [btn1 setTitle:@"" forState:UIControlStateNormal];
    [btn1 addTarget:self action:@selector(btnTest) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn1];

注意：通过 [UIButton buttonWithType:UIButtonTypeCustom] 创建的按钮不能手动release，交给系统好了。不能写 [button release];



 
疑问 & 发现
两种不同的创建方式，其中一种button 可以显示titile，但是另外一种不能显示。如下所示；
 


//            UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];    //使用这种创建方式，button 不能显示 titile
//            button.frame = CGRectMake(10+(Screen_width*schemeCount)+30+100, 20+(j*30), 130, 40);
            
            //使用alloc的方式创建，button 可以显示title
            UIButton *button = [[UIButton alloc]initWithFrame:CGRectMake(10+(Screen_width*schemeCount)+30+100, 20+(j*30), 130, 40)];
            [button setTitle:@"1" forState:UIControlStateNormal];
            [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
            [button setBackgroundColor:[UIColor whiteColor]];
            [self.uisv_bottomView addSubview:button];
            [button release];


 

找到狗血的原因了！使用如下方法创建button时，不能使用［button release]; 否则，button 不能显示标题


UIButton *button = buttonWithType:UIButtonTypeRoundedRect]; 
button.frame = CGRectMake(10+(Screen_width*schemeCount)+30+100, 20+(j*30), 130, 40);

 
疑问：经过实践发现，当把一个button 依附到一个 imageview时，button按钮没有按下去的效果，而且，不能够设置背景图片。只能设置颜色。下面代码，在［imageView addSubView:button]; 不起作用。为什么？ 难道button 只能add到view上？而不是imageView上？（是不是也因为狗血的 release 啊）

[button setBackgroundImage:[UIImage imageNamed:@"button_anpai.png"] forState:UIControlStateNormal];

 
 设置UIButton的文字显示位置、字体的大小、字体的颜色
btn.frame = CGRectMake(x, y, width, height);
[btn setTitle: @"search" forState: UIControlStateNormal];
//设置按钮上的自体的大小
//[btn setFont: [UIFont systemFontSize: 14.0]];    //这种可以用来设置字体的大小，但是可能会在将来的SDK版本中去除改方法
//应该使用
btn.titleLabel.font = [UIFont systemFontOfSize: 14.0];
[btn seBackgroundColor: [UIColor blueColor]];
//最后将按钮加入到指定视图superView
[superView addSubview: btn];        //为什么要指定到superview？
==========================================================
tvnamelabel=[[UIButton alloc]initWithFrame:CGRectMake(5,5,200,40)];
这样初始化的button，文字默认颜色是白色的，所有如果背景也是白色的话，是看不到文字的，
btn.contentHorizontalAlignment=UIControlContentHorizontalAlignmentLeft ;//设置文字位置，现设为居左，默认的是居中
但是问题又出来，此时文字会紧贴到做边框，我们可以设置
btn.contentEdgeInsets = UIEdgeInsetsMake(0,10, 0, 0);
使文字距离做边框保持10个像素的距离。
=======================================================
设置UIButton上字体的颜色设置UIButton上字体的颜色
[btn setTitleColor:[UIColor blackColor]forState:UIControlStateNormal];
长按按钮响应事件


{

 //长按删除按钮
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(deleteLongPressed)];
//    longPress.minimumPressDuration = 0.5;    //最短按压时间,一般地，此句不写也可以
    [uib_delete addGestureRecognizer:longPress];
    
}

//长按删除按钮，删除所有输入的号码
-(void)deleteLongPressed
{
    uil_phoneNumber.text = @"";
    nsms_phoneNumber = [[NSMutableString alloc]initWithFormat:@""];
}


 
UIButton 两种设置背景图片方式的区别
第一种：setBackGroudImage   ：图片被拉伸
第二种：setImage     :  图片保持原大小
 
非alloc 的button 都不要release ，否则button 显示不出来。虽然button的 retaincount 还是1 。如下


        //button 剧集
        button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(0, k_headImageView_height, SCREEN_WIDTH/2-1, 84/2-1);
        [button setBackgroundImage:[ImageUtilities createImageWithColor:[UIColor whiteColor]] forState:UIControlStateNormal];
        [button setBackgroundImage:[ImageUtilities createImageWithColor:[ColorUtils colorWithHexString:k_buttonSelect_backGroudColor]] forState:UIControlStateSelected];
        [button setTitle:@"剧集" forState:UIControlStateNormal];
        [button.titleLabel setFont:[UIFont systemFontOfSize:k_introduceInfo_fontSize]];
        [button setTitleColor:[ColorUtils colorWithHexString:k_introduceInfo_textColor] forState:UIControlStateNormal];
        [button setTitleColor:[ColorUtils colorWithHexString:k_buttonSelect_textColor] forState:UIControlStateSelected];
        [button addTarget:self action:@selector(btnEpisodeClicked:) forControlEvents:UIControlEventTouchUpInside];
        episodeButton = button;
        [self.view addSubview:episodeButton];
        //[button release];    //   若此处添加 release， button 将显示不出来。


 
如何设置能让UIButton点一下，保持按下去的状态，再点一下弹起来？
方法：做一个判断修改selected属性如：    [_tmpBtn setSelected:YES]; OR [_tmpBtn setSelected:NO];
 
UIButton 的的对象 button 有三种 状态，分贝是normal   selected  highlighted ，他们之间有什么区别？
UIControlStateNormal  指按钮的正常状态，这个没有异议吧。
UIControlStateHighlighted   指按钮被按下去时的状态！
UIControlStateSelected       指按钮被选中时的状态！
“按下去”和“选中”有什么区别？“按下去时状态”指被手指按压时的状态。“选中时状态”指手指按压已经完毕，并离开。按钮呈现的状态。所以，设置一个按钮被按下去时的图片变化时，要用UIControlStateHighlighted而不是UIControlStateSelected。
UIButton的一个小陷阱——注意：titleLabel是readonly的！

在使用UIButton的时候，有时需要在运行时动态改变按钮的文字、样式。但iOS SDK的文档说得不是很清楚，使用错误的API经常会产生诡异的结果，如点击UIButton后，text变回默认值。
错误的方式

1
2



/* Wrong way */
yourButton.titleLabel.text = @"SampleText";


这里titleLabel是readonly的，但我们可以改变titleLabel的property。问题出在UIButton是有Default, Highlighted, Selected, Disabled几种状态的。这种方式会改变当前状态的text，但一旦状态改变（如tap一下）,则会变成默认的设置。
正确的方式

1
2



/* Right way */
[yourButton setTitle:@"SampleText" forState:UIControlStateNormal];


如果其它状态没有特别设置的话，设置UIControlStateNormal这个状态，会自动设置其它状态。

参考： http://www.iwangke.me/2012/09/05/caveat-for-uibutton/
让UIButton在按下时没有高亮效果
方法一：

button1.adjustsImageWhenHighlighted = NO;     //取消按钮高亮状态（有些时候，我们并不想要系统给的那个状态）

参考：http://www.cocoachina.com/bbs/simple/?t106229.html
方法二：为UIButton所有状态设置一张透明的图片。详情请看：让UIButton在按下时没有高亮效果
设置按钮被点中的高亮光晕效果

[cancelButton setShowsTouchWhenHighlighted:YES];

 
按钮扩大触摸响应区域


原来代码如下：menuBtn.frame = CGRectMake(4, 8, 44, 28);
扩大触摸区域代码如下：
[menuBtn setImage:[PYUtiles imageFromFile:@"MenuBtn.png"] forState:UIControlStateNormal];
[menuBtn setFrame:CGRectMake(0, 0, 48, 44)];
[menuBtn setContentMode:UIViewContentModeCenter];
原理，扩大button的frame rect，并且将图片设置成居中即可
注意，这边要是setImage，setBackgroundImage不行，会扩大图片到整个响应区域


参考：http://www.myexception.cn/mobile/550219.html 
 设置UIButton 的字体阴影

[[rightButton titleLabel] setShadowColor:[UIColor blackColor]];
[[rightButton titleLabel] setShadowOffset:CGSizeMake(-0.5, -0.5)];

 
调整Button内部内容的边距(Padding)

[self.userNameButton setContentEdgeInsets:UIEdgeInsetsMake(0, 3, 0, 0)];  

参考：http://blog.csdn.net/ysy441088327/article/details/7660183
保持UIButton高亮状态  （点击进入）
参考：关于UIButton的highlighted状态的总结 （在按钮up的时候button的highlighted状态会被clear,）
 
关于UIButton选中和高亮状态下的图片切换 （点击进入）
总结：当button的状态为selected的时候，高亮时对应的状态应该是selected|highlighted，这与normal下高亮的状态highlighted不同。
代码如下：

[myButton setImage:imageSelectedHover forState:(UIControlStateSelected | UIControlStateHighlighted)];

 
UIButtonTypeCustom 和  UIButtonTypeRoundedRect  的区别
 UIButtonTypeCustom ：是一个背景透明的按钮。  如果想做按钮中图片切换（不同状态），必须使用两张图片进行设置。
UIButtonTypeRoundedRect ：是一个圆角矩形按钮。方便之处：系统会自动为这种按钮设置高亮状态（半透明状态）。即，通过一张图片，就可以做出按钮交互的效果。 不方便的地方：如果你想自定义不同状态下，按钮显示的背景，这种类型的按钮就支持的不好。
建议：快速开发，每个按钮只有一张图片，建议使用UIButtonTypeRoundedRect。按钮高度自定义，建议使用UIButtonTypeCustom。
 
titleEdgeInsets  imageEdgeInsets 的使用
  [myButton setTitleEdgeInsets:UIEdgeInsetsMake(0, 0, 0, 0)]; 4个参数是上边界，左边界，下边界，右边界。
 
使用UIButton和UIImageView时的坑
－》使用将UIButton设置为透明，然后使用UIImage 或者UIImageView作为UIButton的父view，可能会使UImage覆盖的那片UIButton区域失去事件响应。解决方案：设置UIimage或者UIImageView的人机交互属性为YES.     ***.userInteractionEnabled = YES;
2、同理，如果将一个imageview作为uibutton的子view赋给uibutton，那么uibutton被覆盖的区域将失去事件响应能力。解决方案：让uibutton在上层，imageview在下层即可。注意，此处设置人机交互属性为YES也是没用的哦。 
uibutton增加长按事件之后怎么识别自己uibutton.tag
UIButton *btn =(UIButton*)gesture.view;NSLog(@"%d",btn.tag);

转载于:https://www.cnblogs.com/liuyingjie/p/4966548.html

UIButton control states

Apr 16, 2013

Here’s another example of the (slightly) hidden flexibility of UIButton. Until recently, I was not aware that, in the various setX:forState: methods,
 you can actually use a bitmask to specify multiple control states. Hopefully I’m not the only person in the world that didn’t realise this and this article will help someone else. In the documentation for UIControl,
 control states are described thusly (emphasis mine):


The state of a control; a control can have more than one state at a time. States are recognized differently depending on the control. For example, a UIButton instance may be configured (using the setImage:forState: method) to display one image
 when it is in its normal state and a different image when it is highlighted.


So why would you care about this? Say you were implementing an edit button or a selection button with text, a background image and an image. You want different text and images for the selected and unselected states (e.g. Edit and Done),
 but you also want to modify the images or background images when highlighting - if you’re creating your own theme for the app then the default darkening or dimming might not be what you want.

So you actually need four images - normal, highlighted, selected and selected + highlighted.

This is achieved like so:


[self.button setBackgroundImage:normal forState:UIControlStateNormal];
[self.button setBackgroundImage:highlighted forState:UIControlStateHighlighted];
[self.button setBackgroundImage:selected forState:UIControlStateSelected];
[self.button setBackgroundImage:selectedHighlighted forState:UIControlStateSelected | UIControlStateHighlighted];



You can do a similar thing with setImage:forState and setTitle:forState: (you
 need to specifically set a title for UIControlStateSelected | UIControlStateHighlighted, because otherwise the title for UIControlStateNormal will
 be used. If you’re using different title text attributes, you also need to specifically set them for the selected + highlighted state.

Here’s a spectacularly ugly demonstration of the four states of a button:






传送门：http://commandshift.co.uk/blog/2013/04/16/uibutton-control-states/