iOS开发UI篇—transframe属性（形变)

//
// YYViewController.m
// 01-练习使用按钮的frame和center属性
//
// Created by apple on 14-5-21.
// Copyright (c) 2014年 itcase. All rights reserved.
//

#import "YYViewController.h"

//私有扩展
@interface YYViewController ()

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

@implementation YYViewController

//枚举类型，从1开始
//枚举类型有一个很大的作用，就是用来代替程序中的魔法数字
typedef enum
{
ktopbtntag=1,
kdownbtntag,
krightbtntag,
kleftbtntag
}btntag;

//viewDidLoad是视图加载完成后调用的方法，通常在此方法中执行视图控制器的初始化工作
- (void)viewDidLoad
{

//在viewDidLoad方法中，不要忘记调用父类的方法实现
[super viewDidLoad];

//手写控件代码
//一、写一个按钮控件，上面有一张图片

//1.使用类创建一个按钮对象
// UIButton *headbtn=[[UIButton alloc] initWithFrame:CGRectMake(100 ,100, 100, 100)];
//设置按钮对象为自定义型
UIButton *headbtn=[UIButton buttonWithType:UIButtonTypeCustom];

//2.设置对象的各项属性

//(1)位置等通用属性设置
headbtn.frame=CGRectMake(100, 100, 100, 100);

//(2)设置普通状态下按钮的属性
[headbtn setBackgroundImage:[UIImage imageNamed:@"i"] forState:UIControlStateNormal];
[headbtn setTitle:@"点我！" forState:UIControlStateNormal];
[headbtn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];

//(3)设置高亮状态下按钮的属性
[headbtn setBackgroundImage:[UIImage imageNamed:@"a"] forState:UIControlStateHighlighted];
[headbtn setTitle:@"还行吧~" forState:UIControlStateHighlighted];
[headbtn setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];

//3.把对象添加到视图中展现出来
[self.view addSubview:headbtn];
//注意点！
self.headImageView=headbtn;

//二、写四个控制图片左右上下移动方向的按钮控件

/**================向上的按钮=====================*/
//1.创建按钮对象
UIButton *topbtn=[UIButton buttonWithType:UIButtonTypeCustom];

//2.设置对象的属性
topbtn.frame=CGRectMake(100, 250, 40, 40);
[topbtn setBackgroundImage:[UIImage imageNamed:@"top_normal"] forState:UIControlStateNormal];
[topbtn setBackgroundImage:[UIImage imageNamed:@"top_highlighted"] forState:UIControlStateHighlighted];
[topbtn setTag:1];
//3.把控件添加到视图中
[self.view addSubview:topbtn];

//4.按钮的单击控制事件
[topbtn addTarget:self action:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];


/**================向下的按钮=====================*/
//1.创建按钮对象
UIButton *downbtn=[UIButton buttonWithType:UIButtonTypeCustom];
//2.设置对象的属性
downbtn.frame=CGRectMake(100, 350, 40, 40);
[downbtn setBackgroundImage:[UIImage imageNamed:@"bottom_normal"] forState:UIControlStateNormal];
[downbtn setBackgroundImage:[UIImage imageNamed:@"bottom_highlighted"] forState:UIControlStateHighlighted];
[downbtn setTag:2];
//3.把控件添加到视图中
[self.view addSubview:downbtn];

//4.按钮的单击控制事件
[downbtn addTarget:self action:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];

/**================向左的按钮=====================*/
//1.创建按钮对象
UIButton *leftbtn=[UIButton buttonWithType:UIButtonTypeCustom];
//2.设置对象的属性
leftbtn.frame=CGRectMake(50, 300, 40, 40);
[leftbtn setBackgroundImage:[UIImage imageNamed:@"left_normal"] forState:UIControlStateNormal];
[leftbtn setBackgroundImage:[UIImage imageNamed:@"left_highlighted"] forState:UIControlStateHighlighted];
[leftbtn setTag:4];
//3.把控件添加到视图中
[self.view addSubview:leftbtn];

//4.按钮的单击控制事件
[leftbtn addTarget:self action:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];



/**================向右的按钮=====================*/
//1.创建按钮对象
UIButton *rightbtn=[UIButton buttonWithType:UIButtonTypeCustom];
//2.设置对象的属性
rightbtn.frame=CGRectMake(150, 300, 40, 40);
[rightbtn setBackgroundImage:[UIImage imageNamed:@"right_normal"] forState:UIControlStateNormal];
[rightbtn setBackgroundImage:[UIImage imageNamed:@"right_highlighted"] forState:UIControlStateHighlighted];
[rightbtn setTag:3];
//3.把控件添加到视图中
[self.view addSubview:rightbtn];

//4.按钮的单击控制事件
[rightbtn addTarget:self action:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];

//三、写两个缩放按钮
/**================放大的按钮=====================*/
//1.创建对象
UIButton *plusbtn=[UIButton buttonWithType:UIButtonTypeCustom];
//2.设置属性
plusbtn.frame=CGRectMake(75, 400, 40, 40);
[plusbtn setBackgroundImage:[UIImage imageNamed:@"plus_normal"] forState:UIControlStateNormal];
[plusbtn setBackgroundImage:[UIImage imageNamed:@"plus_highlighted"] forState:UIControlStateHighlighted];
[plusbtn setTag:1];
//3.添加到视图
[self.view addSubview:plusbtn];
//4.单击事件
[plusbtn addTarget:self action:@selector(Zoom:) forControlEvents:UIControlEventTouchUpInside];


/**================缩小的按钮=====================*/
UIButton *minusbtn=[UIButton buttonWithType:UIButtonTypeCustom];
minusbtn.frame=CGRectMake(125, 400, 40, 40);
[minusbtn setBackgroundImage:[UIImage imageNamed:@"minus_normal"] forState:UIControlStateNormal];
[minusbtn setBackgroundImage:[UIImage imageNamed:@"minus_highlighted"] forState:UIControlStateHighlighted];
[minusbtn setTag:0];
[self.view addSubview:minusbtn];
[minusbtn addTarget:self action:@selector(Zoom:) forControlEvents:UIControlEventTouchUpInside];

/**================向左旋转按钮=====================*/
UIButton *leftrotatebtn=[UIButton buttonWithType:UIButtonTypeCustom];
[leftrotatebtn setFrame:CGRectMake(175, 400, 40, 40)];
[leftrotatebtn setBackgroundImage:[UIImage imageNamed:@"left_rotate_normal"] forState:UIControlStateNormal];
[leftrotatebtn setBackgroundImage:[UIImage imageNamed:@"left_rotate_highlighted"] forState:UIControlStateHighlighted];
[leftrotatebtn setTag:1];
[self.view addSubview:leftrotatebtn];
[leftrotatebtn addTarget:self action:@selector(Rotate:) forControlEvents:UIControlEventTouchUpInside];

/**================向右旋转按钮=====================*/
UIButton *rightrotatebtn=[UIButton buttonWithType:UIButtonTypeCustom];
[rightrotatebtn setFrame:CGRectMake(225, 400, 40, 40)];
[rightrotatebtn setBackgroundImage:[UIImage imageNamed:@"right_rotate_normal"] forState:UIControlStateNormal];
[rightrotatebtn setBackgroundImage:[UIImage imageNamed:@"right_rotate_highlighted"] forState:UIControlStateHighlighted];
[rightbtn setTag:0];
[self.view addSubview:rightrotatebtn];
[rightrotatebtn addTarget:self action:@selector(Rotate:) forControlEvents:UIControlEventTouchUpInside];
}

//控制方向的多个按钮调用同一个方法
-(void)Click:(UIButton *)button
{

//练习使用frame属性
//CGRect frame=self.headImageView.frame;

/**注意，这里如果控制位置的两个属性frame和center同时使用的话，会出现很好玩的效果，注意分析*/
//练习使用center属性
CGPoint center=self.headImageView.center;
switch (button.tag) {
case ktopbtntag:
center.y-=30;
break;
case kdownbtntag:
center.y+=30;
break;
case kleftbtntag:
//发现一个bug,之前的问题是因为少写了break,造成了它们的顺序执行，sorry
//center.x=center.x-30;
center.x-=50;
break;
case krightbtntag:
center.x+=50;
break;
}

// self.headImageView.frame=frame;

//首尾式设置动画效果
[UIView beginAnimations:nil context:nil];
self.headImageView.center=center;
//设置时间
[UIView setAnimationDuration:2.0];
[UIView commitAnimations];
NSLog(@"移动!");

}
-(void)Zoom:(UIButton *)btn
{
//使用bounds，以中心点位原点进行缩放
CGRect bounds = self.headImageView.bounds;
if (btn.tag) {
bounds.size.height+=30;
bounds.size.width+=30;
}
else
{
bounds.size.height-=50;
bounds.size.width-=50;
}

//设置首尾动画
[UIView beginAnimations:nil context:nil];
self.headImageView.bounds=bounds;
[UIView setAnimationDuration:2.0];
[UIView commitAnimations];
}

-(void)Rotate:(UIButton *)rotate
{
//位移（不累加）
//self.headImageView.transform=CGAffineTransformMakeTranslation(50, 200);
//缩放
//self.headImageView.transform=CGAffineTransformMakeScale(1.2, 10);
//在原有的基础上位移（是累加的）
//self.headImageView.transform=CGAffineTransformTranslate(self.headImageView.transform, 50, 50);
//在原有的基础上进行缩放
//self.headImageView.transform=CGAffineTransformScale(self.headImageView.transform, 1.5, 1.6);

//在原有的基础上进行旋转
if (rotate.tag) {
//旋转角度为1/pi，逆时针
self.headImageView.transform=CGAffineTransformRotate(self.headImageView.transform, -M_1_PI);
}
else
{
//旋转的角度为pi/2，顺时针
self.headImageView.transform=CGAffineTransformRotate(self.headImageView.transform, M_PI_2);
}

}
@end