UIButton

#import "AppDelegate.h"

@interface AppDelegate ()

@property(nonatomic, assign)BOOL isSelected;

@property(nonatomic, assign)BOOL isClick;

@end

@implementation AppDelegate

- (void)dealloc
{
[_window 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];

// UIButton提供的外观控制API:标题,背景图片,前景图片
// UIButton: UIControl: UIView

// 用button自己的便利构造器的方式来创建对象
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
// 指定button的位置和大小
button.frame = CGRectMake(140, 280, 100, 40);
// 设置背景颜色
button.backgroundColor = [UIColor blueColor];
[self.window addSubview:button];
// button不用release
// 给button设置标题
[button setTitle:@"确认" forState:UIControlStateNormal];
// 获取指定状态下的标题
NSString *normalTitle = [button titleForState:UIControlStateNormal];
NSLog(@"%@", normalTitle);
// 标题的字体大小
button.titleLabel.font = [UIFont systemFontOfSize:24];
//    // 设置圆角
//    button.layer.cornerRadius = 10;
//    // 设置边框
//    button.layer.borderWidth = 1;
button.tag = 999;
// 点击方法:button最重要的方法
[button addTarget:self action:@selector(changePic:) forControlEvents:UIControlEventTouchUpInside];

// 移除按钮的点击事件,有什么用?
UIButton *buttont = [UIButton buttonWithType:UIButtonTypeSystem];
buttont.frame = CGRectMake(140, 360, 100, 40);
buttont.backgroundColor = [UIColor blueColor];
[self.window addSubview:buttont];
[buttont setTitle:@"确认" forState:UIControlStateNormal];
[buttont removeTarget:self action:@selector(login:) forControlEvents:UIControlEventTouchUpInside];

// 重新创建一个button
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
button1.frame = CGRectMake(90, 100, 200, 150);
button1.backgroundColor = [UIColor redColor];
button1.titleLabel.font = [UIFont systemFontOfSize:36];
button1.layer.cornerRadius = 30;
button1.layer.borderWidth = 10;
// 改变字体颜色
// 这样设置只会改变文本所占格的背景颜色.不会改变字体颜色
//    button1.titleLabel.backgroundColor = [UIColor orangeColor];
// 改变按钮标题颜色
[button1 setTitleColor:[UIColor orangeColor] forState:UIControlStateNormal];
// 获取按钮标题颜色
UIColor *normalTitleColor = [button1 titleColorForState:UIControlStateNormal];
NSLog(@"%@", normalTitleColor);
// 设置标题阴影颜色 没看见效果 怎样设置标题阴影?
[button1 setTitleShadowColor:[UIColor greenColor] forState:UIControlStateNormal];
// 怎么改变边框颜色?
[button1 setTitle:@"点击即送" forState:UIControlStateNormal];
[self.window addSubview:button1];
[button1 addTarget:self action:@selector(knock:) forControlEvents:UIControlEventTouchUpInside];
button1.tag = 1000;

UIButton *button2 = [UIButton buttonWithType:UIButtonTypeCustom];
button2.frame = CGRectMake(140, 320, 100, 40);
//    button2.layer.cornerRadius = 10;
//    button2.layer.borderWidth = 3;
[button2 setTitle:@"拒绝" forState:UIControlStateNormal];
button2.titleLabel.font = [UIFont systemFontOfSize:24];
[self.window addSubview:button2];
[button2 addTarget:self action:@selector(changeImage:) forControlEvents:UIControlEventTouchUpInside];
button2.tag = 1001;

// 给按钮设置背景图片
// 只需要写入图片的名字就可以
[button setBackgroundImage:[UIImage imageNamed:@"checked.png"] forState:UIControlStateNormal];
[button2 setBackgroundImage:[UIImage imageNamed:@"check.png"] forState:UIControlStateNormal];
// 给按钮设置按钮图片
[button setImage:[UIImage imageNamed:@"BtnOn.png"] forState:UIControlStateNormal];
// 获取按钮图片
// 怎样通过定义一个新图片查找它的图片名字来进行判断?
UIImage *normalImage = [button imageForState:UIControlStateNormal];
NSLog(@"%@", normalImage);  // 打印出的是地址
[button2 setImage:[UIImage imageNamed:@"BtnOff.png"] forState:UIControlStateNormal];

// 如果想使用setImage设置图片的话,button的类型要调整成custom
// setImage方法不会把图片放大或缩小,所以要注意视图尺寸大小
// setBackgroundImage则会改变图片大小适应背景

self.isSelected = YES;
self.isClick = NO;

return YES;
}

- (void)login:(UIButton *)button
{
NSLog(@"移除按钮");
}

- (void)knock:(UIButton *)button
{
// 等号后边本来是一个UIView型 通过前边加的括号转化为UIButton
button = (UIButton *)[self.window viewWithTag:1000];
// 按钮的点击方法会传过来一个相应类型的button,谁触发了这个点击方法,相应的button就是谁的对象
// 判断当前按钮的标题
NSLog(@"%@", button.currentTitle); // 打印标题
if (([button.currentTitle isEqual: @"点击即送"])) {
[button setTitle:@"屠龙宝刀" forState:UIControlStateNormal];
} else {
[button setTitle:@"点击即送" forState:UIControlStateNormal];
}
NSLog(@"%ld", (long)button.tag);
// 这个long系统给加的 可以不加
}

// 为什么有的时候按钮点击后图片开关和文字没有同时改变导致错位?
// 下边这两个方法有问题 有可能是不能将两个变换写在一个方法里,总之每次开始运行的时候 需要点两遍才变 会导致两个变换不统一
// 更换按钮的背景图片
- (void)changePic:(UIButton *)button
{
button = (UIButton *)[self.window viewWithTag:999];
NSLog(@"%@", button.currentTitle);
if ([button.currentTitle isEqual:@"确认"]) {
[button setTitle:@"取消" forState:UIControlStateNormal];
} else {
[button setTitle:@"确认" forState:UIControlStateNormal];
}
NSLog(@"%ld", (long)button.tag);
// 判断
if (self.isSelected) {
[button setBackgroundImage:[UIImage imageNamed:@"check.png"] forState:UIControlStateNormal];

} else {
[button setBackgroundImage:[UIImage imageNamed:@"checked.png"] forState:UIControlStateNormal];
}
self.isSelected = !self.isSelected;
if (self.isClick) {
[button setImage:[UIImage imageNamed:@"BtnOn"] forState:UIControlStateNormal];
} else {
[button setImage:[UIImage imageNamed:@"BtnOff"] forState:UIControlStateNormal];
}
self.isClick = !self.isClick;
}

- (void)changeImage:(UIButton *)button
{
button = (UIButton *)[self.window viewWithTag:1001];
NSLog(@"%@", button.currentTitle);
if ([button.currentTitle isEqual:@"拒绝"]) {
[button setTitle:@"取消" forState:UIControlStateNormal];
} else {
[button setTitle:@"拒绝" forState:UIControlStateNormal];
}
NSLog(@"%ld", (long)button.tag);
if (self.isClick) {
[button setImage:[UIImage imageNamed:@"BtnOn"] forState:UIControlStateNormal];
} else {
[button setImage:[UIImage imageNamed:@"BtnOff"] forState:UIControlStateNormal];
}
self.isClick = !self.isClick;
// 判断
if (self.isSelected) {
[button setBackgroundImage:[UIImage imageNamed:@"check.png"] forState:UIControlStateNormal];

} else {
[button setBackgroundImage:[UIImage imageNamed:@"checked.png"] forState:UIControlStateNormal];
}
self.isSelected = !self.isSelected;
}

@end