南京seo公司排名,四川seo整站优化,运营托管公司,4435建站前言 本来没有打算写这篇文章的, 主要是因为在工作中遇到一些同事再用 有UIButton的时候, 有些很基本的,系统API提供的都不知道, 例如 如何让UIButton的文字居上,居左, 居右, 居下对其等一些基本点, 为此我特地写了一下UIButton小结 UIButton回顾 继承关系 NSObject - UIRe…前言 本来没有打算写这篇文章的, 主要是因为在工作中遇到一些同事再用 有UIButton的时候, 有些很基本的,系统API提供的都不知道, 例如 如何让UIButton的文字居上,居左, 居右, 居下对其等一些基本点, 为此我特地写了一下UIButton小结 UIButton回顾 继承关系 NSObject - UIResponder - UIView - UIControl - UIButton
复制代码API 初始化 遍历构造器 (instancetype)buttonWithType:(UIButtonType)buttonType;
复制代码button类型 typedef NS_ENUM(NSInteger, UIButtonType) {UIButtonTypeCustom 0, //自定义风格UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0), //系统样式从iOS7开始使用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UIButtonTypeRoundedRect UIButtonTypeSystem, //圆角矩形从iOS7废弃iOS6中可以使用};
复制代码偏移量 内容偏移量正值表示间隔值负值表示超出参照物的距离。UIEdgeInsetsMake(top, left, bottom, right)有四个值需要设置分别距离上左下右边的间隔。 // default is UIEdgeInsetsZero. On tvOS 10 or later, default is nonzero except for custom buttons.
property(nonatomic) UIEdgeInsets contentEdgeInsets UI_APPEARANCE_SELECTOR;
复制代码标题偏移量和图片偏移量是相对的比如自定义一个按钮实现的效果是图片在左边标题在右边可以用这个属性设置完标题偏移量图片偏移量就是相对于标题的 property(nonatomic) UIEdgeInsets titleEdgeInsets; // default is UIEdgeInsetsZero
复制代码图片偏移量 property(nonatomic) UIEdgeInsets imageEdgeInsets;
复制代码其他API button的状态为高亮时文本的阴影会反转 默认是NO property(nonatomic) BOOL reversesTitleShadowWhenHighlighted;
复制代码button的状态为高亮时图像变暗 默认是YES property(nonatomic) BOOL adjustsImageWhenHighlighted;
复制代码button的状态为禁用时图像变暗。默认是YES property(nonatomic) BOOL adjustsImageWhenDisabled;
复制代码button的状态为高亮时发光。默认是NO property(nonatomic) BOOL showsTouchWhenHighlighted;
复制代码系统的一些样式DetailDisclosure InfoLight InfoDark ContactAdd颜色会改变 property(nonatomic,retain) UIColor *tintColor NS_AVAILABLE_IOS(5_0);
复制代码button的状态。包括一些其他的控制的状态 typedef NS_OPTIONS(NSUInteger, UIControlState) {UIControlStateNormal 0, //正常状态UIControlStateHighlighted 1 0, //高亮状态UIControlStateDisabled 1 1, //禁用状态UIControlStateSelected 1 2, //选中状态UIControlStateApplication 0x00FF0000,UIControlStateReserved 0xFF000000
};
复制代码// 设置标题 default is nil. title is assumed to be single line
- (void)setTitle:(nullable NSString *)title forState:(UIControlState)state; // 设置标题颜色 default if nil. use opaque white
- (void)setTitleColor:(nullable UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR;// 设置标题阴影颜色default is nil. use 50% black
- (void)setTitleShadowColor:(nullable UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR; // 设置图片default is nil.
should be same size if different for different states
- (void)setImage:(nullable UIImage *)image forState:(UIControlState)state; // 设置背景图片// default is nil
- (void)setBackgroundImage:(nullable UIImage *)image forState:(UIControlState)state UI_APPEARANCE_SELECTOR; // 设置富文本标题default is nil. title is assumed to be single line
- (void)setAttributedTitle:(nullable NSAttributedString *)title forState:(UIControlState)state NS_AVAILABLE_IOS(6_0);
复制代码// 返回不同状态下标题
- (nullable NSString *)titleForState:(UIControlState)state;// 返回不同状态下标题颜色
- (nullable UIColor *)titleColorForState:(UIControlState)state;// 返回不同状态下标题阴影颜色
- (nullable UIColor *)titleShadowColorForState:(UIControlState)state;// 返回不同状态下图片
- (nullable UIImage *)imageForState:(UIControlState)state;// 返回不同状态下背景图片
- (nullable UIImage *)backgroundImageForState:(UIControlState)state;// 返回不同状态下富文本标题
- (nullable NSAttributedString *)attributedTitleForState:(UIControlState)state NS_AVAILABLE_IOS(6_0);复制代码// button的当前标题。当按钮状态改变时值自动改变可以做判断当前标题是全文则点击展开标题设置为收起当前标题是收起则点击收起全文。
property(nullable, nonatomic,readonly,strong) NSString *currentTitle; // 当前标题颜色default is white(1,1)
property(nonatomic,readonly,strong) UIColor *currentTitleColor; // 当前状态下标题阴影颜色
property(nullable, nonatomic,readonly,strong) UIColor *currentTitleShadowColor;
// 当前状态下图片 切换不同图片比如做单选多选可以使用。
property(nullable, nonatomic,readonly,strong) UIImage *currentImage;
property(nullable, nonatomic,readonly,strong) UIImage *currentBackgroundImage;
property(nullable, nonatomic,readonly,strong) NSAttributedString *currentAttributedTitle NS_AVAILABLE_IOS(6_0);
复制代码property(nullable, nonatomic,readonly,strong) UILabel *titleLabel NS_AVAILABLE_IOS(3_0);
property(nullable, nonatomic,readonly,strong) UIImageView *imageView NS_AVAILABLE_IOS(3_0);
复制代码// 返回背景绘制区域
- (CGRect)backgroundRectForBounds:(CGRect)bounds;// 返回内容绘制区域。内容区域是显示图片和标题及他们特定对齐缩放等的范围
- (CGRect)contentRectForBounds:(CGRect)bounds;// 返回标题的绘制区域
- (CGRect)titleRectForContentRect:(CGRect)contentRect;// 返回图片的绘制区域
- (CGRect)imageRectForContentRect:(CGRect)contentRect;
复制代码这个地方的API是UIControl的, 很多人并没有在意这个类, 然后用一些很笨的手段去解决对其方式 // button 内容垂直对其方式 default is center
property(nonatomic) UIControlContentVerticalAlignment contentVerticalAlignment; // button 内容水平对其方式 default is center
property(nonatomic) UIControlContentHorizontalAlignment contentHorizontalAlignment;
复制代码转载于:https://juejin.im/post/5aa53fb86fb9a028dd4ddaf3
