1.NSBundle
1> 一个NSBundle代表一个文件夹,利用NSBundle能访问对应的文件夹
2> 利用mainBundle就可以访问软件资源包中的任何资源
3> 模拟器应用程序的安装路径
/Users/aplle/资源库/Application Support/iPhone Simulator/7.1/Applications
2.UIImageView和UIButton
1> 使用场合
* UIImageView: 如果仅仅是显示图片,不需要监听图片的点击
* UIButton: 既要显示图片,又要监听图片的点击
2> 相同:能显示图片
3> 不同点
* UIButton能处理点击事件, UIImageView不能处理点击事件
* UIButton既能显示图片, 又能显示文字
* UIButton能同时显示两张图片
* UIButton继承自UIControl, 因此默认就能处理事件
* UIImageView继承自UIView, 因此默认就不能处理事件
3.Xcode文档安装路径
/Applications/Xcode.app/Contents/Developer/Documentation/DocSets
4.Xcode模拟器安装路径
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs
5,UIView的常?见属性
? @property(nonatomic,readonly) UIView *superview;
? 获得?自?己的?父控件对象
? @property(nonatomic,readonly,copy) NSArray *subviews;
? 获得?自?己的所有?子控件对象
? @property(nonatomic) NSInteger tag;
? 控件的ID\标识,?父控件可以通过tag来找到对应的?子控件
? @property(nonatomic) CGAffineTransform transform;
? 控件的形变属性(可以设置旋转?角度、?比例缩放、平移等属性)
在OC中,通过transform属性可以修改对象的平移、缩放比例和旋转角度
常用的创建transform结构体方法分两大类
(1) 创建“基于控件初始位置”的形变
CGAffineTransformMakeTranslation(平移)
CGAffineTransformMakeScale(缩放)
CGAffineTransformMakeRotation(旋转)
(2) 创建“基于transform参数”的形变
CGAffineTransformTranslate
CGAffineTransformScale
CGAffineTransformRotate
补充:
在OC中,所有跟角度相关的数值,都是弧度值,180° = M_PI
正数表示顺时针旋转
负数表示逆时针旋转
提示:由于transform属性可以基于控件的上一次的状态进行叠加形变,例如,先旋转再平移。因此在实际动画开发中,当涉及位置、尺寸形变效果时,大多修改控件的transform属性,而不是frame、bounds、center 。
@property(nonatomic) CGRect frame; 控件所在矩形框在?父控件中的位置和尺?寸(以?父控件的左上?角为坐标原点)
@property(nonatomic) CGRect bounds; 控件所在矩形框的位置和尺?寸(以?自?己左上?角为坐标原点,所以bounds的x\y?一般
为0)
@property(nonatomic) CGPoint center;
控件中点的位置(以?父控件的左上?角为坐标原点)
6,UIView的常?见?方法
? - (void)addSubview:(UIView *)view;
? 添加?一个?子控件view
? - (void)removeFromSuperview;
? 从?父控件中移除
? - (UIView *)viewWithTag:(NSInteger)tag;
? 根据?一个tag标识找出对应的控件(?一般都是?子控件)
7,动画的两种创建方式
1)
//开始动画
[UIView beginAnimations:nil context:nil];
// 执行动画内容
self.headImageView.bounds=bounds;
// 设置动画时间
[UIView setAnimationDuration:2.0];
// 提交动画
[UIView commitAnimations];
2) // 一般用这种方式
UIView animateKeyframesWithDuration:<#(NSTimeInterval)#> delay:<#(NSTimeInterval)#> options:<#(UIViewKeyframeAnimationOptions)#> animations:<#^(void)animations#> completion:<#^(BOOL finished)completion#>
8,汤姆猫中动画执行代码顺序
// 1,设置图片数组
self.tom.animationImages = images;
// 2.设置播放次数(1次)
self.tom.animationRepeatCount = 1;
// 3.设置播放时间
self.tom.animationDuration = images.count * 0.05;
// 4,开始动画
[self.tom startAnimating];
性能问题
// 加载图片
// imageNamed: 有缓存(传入文件名)
// UIImage *image = [UIImage imageNamed:filename];
解决办法
// imageWithContentsOfFile: 没有缓存(传入文件的全路径)
NSBundle *bundle = [NSBundle mainBundle];
NSString *path = [bundle pathForResource:filename ofType:nil];
UIImage *image = [UIImage imageWithContentsOfFile:path];
动画放完1秒后清除内存
CGFloat delay = self.tom.animationDuration + 1.0;
[self.tom performSelector:@selector(setAnimationImages:) withObject:nil afterDelay:delay];
代码图片浏览器动态代码:
模型类
#import <Foundation/Foundation.h> #import <UIKit/UIKit.h> @interface LLPic : NSObject // 图片地址 @property (nonatomic, copy) NSString *icon; // 图片 @property (nonatomic, strong) UIImage *image; // 描述 @property (nonatomic, copy) NSString *desc; + (instancetype)picWithDic:(NSDictionary *)dic; - (instancetype)initWithDic:(NSDictionary *)dic; + (NSArray *)array; @end
#import "LLPic.h" @interface LLPic () { UIImage *_imageABC; } @end @implementation LLPic + (NSArray *)array { NSString *path = [[NSBundle mainBundle] pathForResource:@"images.plist" ofType:nil]; NSArray *arrPic = [NSArray arrayWithContentsOfFile:path]; NSMutableArray *arrPicMA = [[NSMutableArray alloc] initWithCapacity:arrPic.count]; for (NSDictionary *dic in arrPic) { [arrPicMA addObject:[self picWithDic:dic]]; } return arrPicMA; } - (UIImage *)image { if (!_imageABC) { _imageABC = [UIImage imageNamed:self.icon]; } return _imageABC; } - (instancetype)initWithDic:(NSDictionary *)dic { if (self = [super init]) { [self setValuesForKeysWithDictionary:dic]; } return self; } + (instancetype)picWithDic:(NSDictionary *)dic { return [[self alloc] initWithDic:dic]; } @end
controller
#import "ViewController.h" #import "LLPic.h" @interface ViewController () // 属性值必须改为strong,如果联系IBOutLet则为week @property (nonatomic, strong) NSArray *picView; @property (nonatomic, strong) UILabel *headLab; @property (nonatomic, strong) UIImageView *imageView; @property (nonatomic, strong) UIButton *leftBtn; @property (nonatomic, strong) UIButton *rightBtn; @property (nonatomic, strong) UILabel *footLab; @property (nonatomic, strong) UIButton *leftRotationBtn; // 左旋转 @property (nonatomic, strong) UIButton *rightRotationBtn; // 右旋转 // 计数器 @property (nonatomic, assign) int index; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. self.view.backgroundColor = [UIColor purpleColor]; [self loadPicView]; } #pragma mark - 按钮点击事件 // 左点击 - (void)leftBtnClick { self.index--; [self loadPicView]; } // 右点击 - (void)rightBtnClick { self.index++; [self loadPicView]; } // 按钮旋转事件 - (void)rotationBtn:(UIButton *)btn { [UIView animateWithDuration:0.2 animations:^{ if (btn.tag == 20) { self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, M_PI_4); } else if (btn.tag == 40){ self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, -M_PI_4); } }]; } #pragma mark - 展示界面 - (void)loadPicView { // 1,拿出模型对象 LLPic *pic = self.picView[self.index]; self.headLab.text = [NSString stringWithFormat:@"%d/%ld", self.index+1, self.picView.count]; self.imageView.image = [UIImage imageNamed:pic.icon]; self.footLab.text = pic.desc; self.leftBtn.enabled = (self.index != 0); self.rightBtn.enabled = (self.index != (self.picView.count-1)); // 2,加载按钮 [self creatRoationBtn]; } #pragma mark - 懒加载控件,代码可读性强,并且提高性能 // headLab的加载 - (UILabel *)headLab { if (!_headLab) { _headLab = [[UILabel alloc] initWithFrame:CGRectMake(10, 20, 300, 30)]; _headLab.textAlignment = NSTextAlignmentCenter; [self.view addSubview:_headLab]; } return _headLab; } // imageView的加载 - (UIImageView *)imageView { if (!_imageView) { _imageView = [[UIImageView alloc] initWithFrame:CGRectMake(70, 70, 180, 180)]; [self.view addSubview:_imageView]; } return _imageView; } // leftBtn的加载 - (UIButton *)leftBtn { if (!_leftBtn) { _leftBtn = [UIButton buttonWithType:UIButtonTypeCustom]; _leftBtn.frame = CGRectMake(0,125, 40, 40); [_leftBtn setBackgroundImage:[UIImage imageNamed:@"left_normal"] forState:UIControlStateNormal]; [_leftBtn setBackgroundImage:[UIImage imageNamed:@"left_highlighted"] forState:UIControlStateHighlighted]; [_leftBtn setBackgroundImage:[UIImage imageNamed:@"left_disable"] forState:UIControlStateDisabled]; // 按钮点击事件 [_leftBtn addTarget:self action:@selector(leftBtnClick) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:_leftBtn]; } return _leftBtn; } // rightBtn的加载 - (void)creatRoationBtn { _rightRotationBtn = [UIButton buttonWithType:UIButtonTypeCustom]; _rightRotationBtn.frame = CGRectMake(200,400,40, 40); [_rightRotationBtn setBackgroundImage:[UIImage imageNamed:@"right_rotate_normal"] forState:UIControlStateNormal]; [_rightRotationBtn setBackgroundImage:[UIImage imageNamed:@"right_rotate_highlighted"] forState:UIControlStateHighlighted]; _rightRotationBtn.tag = 20; [_rightRotationBtn addTarget:self action:@selector(rotationBtn:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:_rightRotationBtn]; _leftRotationBtn = [UIButton buttonWithType:UIButtonTypeCustom]; _leftRotationBtn.frame = CGRectMake(100,400,40, 40); [_leftRotationBtn setBackgroundImage:[UIImage imageNamed:@"left_rotate_normal"] forState:UIControlStateNormal]; [_leftRotationBtn setBackgroundImage:[UIImage imageNamed:@"left_rotate_highlighted"] forState:UIControlStateHighlighted]; _leftRotationBtn.tag = 40; [_leftRotationBtn addTarget:self action:@selector(rotationBtn:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:_leftRotationBtn]; } - (UIButton *)rightBtn { if (!_rightBtn) { _rightBtn = [UIButton buttonWithType:UIButtonTypeCustom]; _rightBtn.frame = CGRectMake(280,125,40, 40); [_rightBtn setBackgroundImage:[UIImage imageNamed:@"right_normal"] forState:UIControlStateNormal]; [_rightBtn setBackgroundImage:[UIImage imageNamed:@"right_highlighted"] forState:UIControlStateHighlighted]; [_rightBtn setBackgroundImage:[UIImage imageNamed:@"right_disable"] forState:UIControlStateDisabled]; [_rightBtn addTarget:self action:@selector(rightBtnClick) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:_rightBtn]; } return _rightBtn; } // 描述lab - (UILabel *)footLab { if (!_footLab) { _footLab = [[UILabel alloc] initWithFrame:CGRectMake(10, 260, 300, 60)]; _footLab.textAlignment = NSTextAlignmentCenter; _footLab.numberOfLines = 0; [self.view addSubview:_footLab]; } return _footLab; } #pragma mark - 加载数据模型 - (NSArray *)picView { if (!_picView) { _picView = [LLPic array]; } return _picView; } @end
完成展示: