iOS的UI开发中Button的基本编写方法讲解

@interface LFViewController ()

@property (weak, nonatomic) IBOutlet UIButton *headImageView;

@end

@implementation LFViewController

// 在OC中，绝大多数的控件的监听方法的第一个参数就是控件本身
//- (IBAction)left:(UIButton *)button {
//   
//    NSLog(@"----");
//}
- (IBAction)move
{
    // 通过frame修改head的位置
    // 在OC中，不允许直接修改“对象”的“结构体属性”的“成员”
    // 允许修改“对象”的“结构体属性”
    // 1. 取出结构体属性
    CGRect rect = self.headImageView.frame;
    // 2. 修改结构体成员
    rect.origin.y -= 20;
    // 3. 设置对象的结构体属性
    self.headImageView.frame = rect;
}

/**
 使用git
 
 1. 创建项目时，勾选git
 2. 开发告一段落后，选择"Source Control""Commit",并编写注释
 */

// 枚举类型实质上就是一个整数，作用就是用来替代魔法数字
// 枚举类型中，指定了第一个整数之后，后面的数字会递增
typedef enum
{
    kMovingDirTop = 10,
    kMovingDirBottom,
    kMovingDirLeft,
    kMovingDirRight,
} kMovingDir;

#define kMovingDelta 50

@interface LFViewController ()

@property (weak, nonatomic) IBOutlet UIButton *headImageView;

@end

@implementation LFViewController

- (IBAction)move:(UIButton *)button
{
//    CGRect rect = self.headImageView.frame;
    CGPoint p = self.headImageView.center;
   
    // magic number魔法数字，其他程序员看到代码的时候，不知道是什么意思
    switch (button.tag) {
        case kMovingDirTop:
            p.y -= kMovingDelta;
            break;
        case kMovingDirBottom:
            p.y += kMovingDelta;
            break;
        case kMovingDirLeft:
            p.x -= kMovingDelta;
            break;
        case kMovingDirRight:
            p.x += kMovingDelta;
            break;
    }

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.0];
   
    self.headImageView.center = p;
   
    [UIView commitAnimations];
}

- (IBAction)zoom:(UIButton *)button
{
    CGRect rect = self.headImageView.bounds;
   
    // 在C语言中，关于bool的判断：非零即真
    if (button.tag) {
        rect.size.width += 50;
        rect.size.height += 50;
    } else {
        rect.size.width -= 50;
        rect.size.height -= 50;
    }
 
    // 首尾动画
    // beginAnimations表示此后的代码要“参与到”动画中
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:2.0];
   
    self.headImageView.bounds = rect;
//    self.headImageView.alpha = 0;
   
    // commitAnimations,将beginAnimation之后的所有动画提交并生成动画
    [UIView commitAnimations];
}

@end

// beginAnimations表示此后的代码要“参与到”动画中

[UIView beginAnimations:nil context:nil];

// setAnimationDuration用来指定动画持续时间

[UIView setAnimationDuration:2.0];

self.headImageView.bounds = rect;

......

// commitAnimations，将beginAnimation之后的所有动画提交并生成动画

[UIView commitAnimations];

    UIButton *button=[[UIButton buttonWithType:(UIButtonType);

 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;

button1.frame = CGRectMake(20, 20, 280, 40);

[button setFrame:CGRectMake(20,20,50,50)];

button1.backgroundColor = [UIColor clearColor];

[button setBackgroundColor:[UIColor blueColor]];

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，可以不管他
};

@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;      

    [buttonsetImage:[UIImageimageNamed:@"checkmarkControllerIcon"]forState:UIControlStateNormal];

    [buttonsetBackgroundImage:[UIImageimageNamed:@"checkmarkControllerIcon"]forState:UIControlStateNormal];

[button1 setTitle:@"点击" forState:UIControlStateNormal];

  [buttonsetTitleColor:[UIColorredColor]forState:UIControlStateNormal];

    button.showsTouchWhenHighlighted=NO;

[button1 addTarget:self action:@selector(butClick:) forControlEvents:UIControlEventTouchUpInside];

[btn removeTarget:nil action:nil forControlEvents:UIControlEventTouchUpInside];

 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