前言：UI控件整理之UIButton
一、顯示圖片（復(fù)選框）
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake([UIScreen mainScreen].bounds.size.width/2 - 15, 60,? 30, 30);
[button setImage:[UIImage imageNamed:@"icon_weixuanzhong-1"] forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:@"icon_xuanzhong-1"] forState:UIControlStateSelected];
[button setBackgroundColor:[UIColor whiteColor]];
[button addTarget:self action:@selector(didChangeBtnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
二、顯示文字
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(30, 60,? [UIScreen mainScreen].bounds.size.width - 60, 30);
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button setTitle:@"UIButton" forState:UIControlStateNormal];
button.titleLabel.font = [UIFont fontWithName:@"IowanOldStyle-Bold" size:15];
[button setBackgroundColor:[UIColor whiteColor]];
[button addTarget:self action:@selector(didChangeBtnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
三婚瓜、部分常用屬性解析
1埂伦、初始化Button（枚舉值）
//初始化Button 不用alloca init 的方法 用便利構(gòu)造器初始化
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
UIButtonTypeCustom // -自定義風(fēng)格
UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0),
UIButtonTypeDetailDisclosure //藍(lán)色小箭頭按鈕澜薄，主要做詳細(xì)說(shuō)明
UIButtonTypeInfoLight //-亮色感嘆號(hào)
UIButtonTypeInfoDark //-暗色感嘆號(hào)
UIButtonTypeContactAdd?// -十字加號(hào)按鈕
UIButtonTypeRoundedRect = UIButtonTypeSystem //-圓角矩形
2朝卒、//設(shè)置button的背景圖片
[button setBackgroundImage:[UIImage imageNamed:@"bg.png"] forState:UIControlStateNormal];
3耍群、//設(shè)置前景圖片 前景圖片必須是鏤空?qǐng)D木西，或者是線條勾勒的圖片
[button setImage:[UIImage imageNamed:@"qj.png"] forState:UIControlStateNormal];
4畴栖、狀態(tài)（forState）
/* forState: 這個(gè)參數(shù)的作用是定義按鈕的文字或圖片在何種狀態(tài)下才會(huì)顯現(xiàn)*/
UIControlStateNormal = 0 // 常規(guī)狀態(tài)顯現(xiàn)
UIControlStateHighlighted = 1 << 0 // 高亮狀態(tài)顯現(xiàn)
UIControlStateDisabled = 1 << 1 // 禁用的狀態(tài)才會(huì)顯現(xiàn)
UIControlStateSelected = 1 << 2 // 選中狀態(tài)
UIControlStateApplication = 0x00FF0000 //當(dāng)應(yīng)用程序標(biāo)志時(shí)
UIControlStateReserved = 0xFF000000 //為內(nèi)部框架預(yù)留，可以不管他
5八千、獲取按鈕當(dāng)前標(biāo)題
@property(nullable, nonatomic,readonly,strong) NSString *currentTitle;
6吗讶、獲取按鈕當(dāng)前按鈕內(nèi)圖像
@property(nullable, nonatomic,readonly,strong) UIImage? *currentImage;
7、按鈕點(diǎn)擊事件（枚舉值）
UIControlEventTouchDown? ? ? ? ? ? // 單點(diǎn)觸摸按下事件：用戶點(diǎn)觸屏幕恋捆，或者又有新手指落下的時(shí)候照皆。
UIControlEventTouchDownRepeat? ? ? // 多點(diǎn)觸摸按下事件，點(diǎn)觸計(jì)數(shù)大于1：用戶按下第二沸停、三膜毁、或第四根手指的時(shí)候。
UIControlEventTouchDragInside? ? ? // 當(dāng)一次觸摸在控件窗口內(nèi)拖動(dòng)時(shí)。
UIControlEventTouchDragOutside? ? ? // 當(dāng)一次觸摸在控件窗口之外拖動(dòng)時(shí)爽茴。
UIControlEventTouchDragEnter? ? ? ? // 當(dāng)一次觸摸從控件窗口之外拖動(dòng)到內(nèi)部時(shí)
UIControlEventTouchDragExit? ? ? ? // 當(dāng)一次觸摸從控件窗口內(nèi)部拖動(dòng)到外部時(shí)葬凳。
UIControlEventTouchUpInside? ? ? ? // 所有在控件之內(nèi)觸摸抬起事件
UIControlEventTouchUpOutside? ? ? ? // 所有在控件之外觸摸抬起事件(點(diǎn)觸必須開始與控件內(nèi)部才會(huì)發(fā)送通知)。
UIControlEventTouchCancel? ? ? ? ? // 所有觸摸取消事件室奏，即一次觸摸因?yàn)榉派狭颂嗍种付蝗∠鹧妫蛘弑簧湘i或者電話呼叫打斷。
UIControlEventValueChanged? ? ? ? ? // 當(dāng)控件的值發(fā)生改變時(shí)胧沫，發(fā)送通知昌简。用于滑塊、分段控件绒怨、以及其他取值的控件纯赎。你可以配置滑塊控件何時(shí)發(fā)送通知，在滑塊被放下時(shí)發(fā)送南蹂，或者在被拖動(dòng)時(shí)發(fā)送犬金。
UIControlEventEditingDidBegin? ? ? // 當(dāng)文本控件中開始編輯時(shí)發(fā)送通知
UIControlEventEditingChanged? ? ? ? // 當(dāng)文本控件中的文本被改變時(shí)發(fā)送通知。
UIControlEventEditingDidEnd? ? ? ? // 當(dāng)文本控件中編輯結(jié)束時(shí)發(fā)送通知六剥。
UIControlEventEditingDidEndOnExit? // 當(dāng)文本控件內(nèi)通過(guò)按下回車鍵（或等價(jià)行為）結(jié)束編輯時(shí)晚顷，發(fā)送通知。
UIControlEventAllTouchEvents? ? ? ? // 通知所有觸摸事件疗疟。
UIControlEventAllEditingEvents? ? ? // 通知所有關(guān)于文本編輯的事件该默。
UIControlEventApplicationReserved? // range available for application use
UIControlEventSystemReserved? ? ? ? // range reserved for internal framework use
UIControlEventAllEvents? ? ? ? ? ? // 通知所有事件
8、標(biāo)題內(nèi)距離
@property(nonatomic) UIEdgeInsets titleEdgeInsets;
9策彤、圖片內(nèi)邊距
@property(nonatomic) UIEdgeInsets imageEdgeInsets;
四栓袖、常用拓展（系統(tǒng)屬性排列）
@property(nonatomic) UIEdgeInsets contentEdgeInsets; 內(nèi)容內(nèi)距離
@property(nonatomic)? UIEdgeInsets titleEdgeInsets;? 標(biāo)題內(nèi)距離
@property(nonatomic)? BOOL? reversesTitleShadowWhenHighlighted; 標(biāo)題的陰影改變時(shí)，按鈕是否高亮顯示店诗。默認(rèn)為NO
@property(nonatomic)? UIEdgeInsets imageEdgeInsets;? 圖片內(nèi)邊距
@property(nonatomic)? BOOL adjustsImageWhenHighlighted;按鈕高亮的情況下裹刮，圖像的顏色是否要加深一點(diǎn)。默認(rèn)是YES
@property(nonatomic)? BOOL adjustsImageWhenDisabled; 按鈕禁用的情況下庞瘸，圖像的顏色是否要加深一點(diǎn)捧弃。默認(rèn)是YES
@property(nonatomic)? BOOL showsTouchWhenHighlighted; 按下按鈕是否會(huì)發(fā)光 默認(rèn)是NO
@property(nonatomic,readonly) UIButtonType buttonType; button的類型
指定背景邊界
- (CGRect)backgroundRectForBounds:(CGRect)bounds;
指定內(nèi)容邊界
- (CGRect)contentRectForBounds:(CGRect)bounds;
指定標(biāo)題邊界
- (CGRect)titleRectForContentRect:(CGRect)contentRect;
指定圖片邊界
- (CGRect)imageRectForContentRect:(CGRect)contentRect;
示例：
- (CGRect)imageRectForContentRect:(CGRect)bounds{
return CGRectMake(0.0, 0.0, 44, 44);
}
獲取按鈕當(dāng)前標(biāo)題
@property(nullable, nonatomic,readonly,strong) NSString *currentTitle;
獲取按鈕當(dāng)前標(biāo)題顏色
@property(nonatomic,readonly,strong) UIColor? *currentTitleColor;
獲取按鈕當(dāng)前陰影標(biāo)題顏色
@property(nullable, nonatomic,readonly,strong) UIColor *currentTitleShadowColor;
獲取按鈕當(dāng)前按鈕內(nèi)圖像
@property(nullable, nonatomic,readonly,strong) UIImage? *currentImage;
獲取按鈕當(dāng)前標(biāo)題背景圖片
@property(nullable, nonatomic,readonly,strong) UIImage? *currentBackgroundImage;
獲取按鈕當(dāng)前標(biāo)題富文本
@property(nullable, nonatomic,readonly,strong) NSAttributedString *currentAttributedTitle
@property(nullable, nonatomic,readonly,strong) UILabel? ? *titleLabel NS_AVAILABLE_IOS(3_0);
@property(nullable, nonatomic,readonly,strong) UIImageView *imageView? NS_AVAILABLE_IOS(3_0);
設(shè)置button某個(gè)狀態(tài)的標(biāo)題
- (void)setTitle:(nullable NSString *)title forState:(UIControlState)state;
例： [button setTitle:@"開燈" forState:UIControlStateNormal];
設(shè)置button某個(gè)狀態(tài)的標(biāo)題顏色
- (void)setTitleColor:(nullable UIColor *)color forState:(UIControlState)state
例：[button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
設(shè)置button某個(gè)狀態(tài)陰影的標(biāo)題顏色
- (void)setTitleShadowColor:(nullable UIColor *)color forState:(UIControlState)state
例：[button setTitleShadowColor:[UIColor purpleColor] forState:UIControlStateNormal];
設(shè)置button某個(gè)狀態(tài)圖片
- (void)setImage:(nullable UIImage *)image forState:(UIControlState)state;
設(shè)置button 某個(gè)狀態(tài)背景圖片
- (void)setBackgroundImage:(nullable UIImage *)image forState:(UIControlState)state UI_APPEARANCE_SELECTOR; // default is nil
設(shè)置button 某個(gè)狀態(tài)下的富文本標(biāo)題
- (void)setAttributedTitle:(nullable NSAttributedString *)title forState:(UIControlState)state NS_AVAILABLE_IOS(6_0); // default is nil. title is assumed to be single line
返回button 某個(gè)狀態(tài)下的標(biāo)題
- (nullable NSString *)titleForState:(UIControlState)state;
返回button 某個(gè)狀態(tài)下的標(biāo)題顏色
- (nullable UIColor *)titleColorForState:(UIControlState)state;
返回button 某個(gè)狀態(tài)下的陰影標(biāo)題顏色
- (nullable UIColor *)titleShadowColorForState:(UIControlState)state;
返回button 某個(gè)狀態(tài)下的圖片
- (nullable UIImage *)imageForState:(UIControlState)state;
返回button 某個(gè)狀態(tài)下的背景圖片
- (nullable UIImage *)backgroundImageForState:(UIControlState)state;
返回button 某個(gè)狀態(tài)下的富文本標(biāo)題
- (nullable NSAttributedString *)attributedTitleForState:(UIControlState)state NS_AVAILABLE_IOS(6_0);
