UIResponder 一个可以接收触摸屏上的触摸事件的对象
触摸事件 motion事件,Remote 控制事件
1）:触摸事件
– touchesBegan:withEvent: 当用户触摸到屏幕时调用方法
– touchesMoved:withEvent: 当用户触摸到屏幕并移动时调用此方法
– touchesEnded:withEvent: 当触摸离开屏幕时调用此方法
– touchesCancelled:withEvent: 当触摸被取消时调用此方法
2):iOS 3.0 + 开始支持motion事件，特别是摇动设备
– motionBegan:withEvent: 运动开始时执行
– motionEnded:withEvent: 运动结束时执行
– motionCancelled:withEvent: 运动被取消时执行
3):iOS 4.0 + 开始支持远程事件
– remoteControlReceivedWithEvent:
控件拖动效果：类似iPhone手机上的Assistive touch控件拖动效果，在整个应用程序内悬浮。
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc]init];
self.window.frame = [UIScreen mainScreen].bounds;
ViewController *rootViewCtrl = [[ViewController alloc]init];
UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:rootViewCtrl];
self.window.rootViewController = nav;
_imgView = [[UIImageView alloc]initWithFrame:CGRectMake(165, 310, 44, 44)];
_imgView.image = [UIImage imageNamed:@"jiameng"];
[self.window.rootViewController.view addSubview:_imgView];
_imgView.userInteractionEnabled = YES;
[self.window makeKeyAndVisible];
return YES;
}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
NSLog(@"触摸VIew的宽%f",touch.view.frame.size.width);
if (touch.view.frame.size.width == self.imgView.frame.size.width ) {
self.isInView = YES;
}else{
self.isInView = NO;
}
_beginpoint = [touch locationInView:self.imgView];
[super touchesBegan:touches withEvent:event];
}
- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if (!self.isInView){
return;
}
UITouch *touch = [touches anyObject];
CGPoint currentPosition = [touch locationInView:self.imgView];
//偏移量
float offsetX = currentPosition.x - _beginpoint.x;
float offsetY = currentPosition.y - _beginpoint.y;
//移动后的中心坐标
self.imgView.center = CGPointMake(self.imgView.center.x + offsetX, self.imgView.center.y + offsetY);
//x轴左右极限坐标
if (self.imgView.center.x > (self.imgView.superview.frame.size.width-self.imgView.frame.size.width/2))
{
CGFloat x = self.imgView.superview.frame.size.width-self.imgView.frame.size.width/2;
self.imgView.center = CGPointMake(x, self.imgView.center.y + offsetY);
}
else if (self.imgView.center.x < self.imgView.frame.size.width/2)
{
CGFloat x = self.imgView.frame.size.width/2;
self.imgView.center = CGPointMake(x, self.imgView.center.y + offsetY);
}
//y轴上下极限坐标
if (self.imgView.center.y > (self.imgView.superview.frame.size.height-self.imgView.frame.size.height/2))
{
CGFloat x = self.imgView.center.x;
CGFloat y = self.imgView.superview.frame.size.height-self.imgView.frame.size.height/2;
self.imgView.center = CGPointMake(x, y);
}
else if (self.imgView.center.y <= self.imgView.frame.size.height/2)
{
CGFloat x = self.imgView.center.x;
CGFloat y = self.imgView.frame.size.height/2;
self.imgView.center = CGPointMake(x, y);
}
}
- CGrect screenBounds = [ [UIScreen mainScreen]bounds];//返回的是带有状态栏的Rect
- CGRect viewBounds = [ [UIScreen mainScreen]applicationFrame];//不包含状态栏的Rect
文件操作
显示Mac隐藏文件的命令：defaults write com.apple.finder AppleShowAllFiles -bool true
隐藏Mac隐藏文件的命令：defaults write com.apple.finder AppleShowAllFiles -bool false
输完单击Enter键，退出终端，重新启动Finder就可以了
重启Finder：鼠标单击窗口左上角的苹果标志-->强制退出-->Finder-->
//NSCachesDirectory NSCachesDirectory NSLibraryDirectory
NSString *homeDirectory = NSHomeDirectory(); //获取程序HOME目录
NSString *tempDirectory = NSTemporaryDirectory(); //获取程序缓存目录
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSAllDomainsMask, YES); //获取document目录
NSString *documentPath = [documentPaths objectAtIndex:0];
NSArray *cachesPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSAllDomainsMask, YES); //获取cache目录
NSString *cachePath = [cachesPaths objectAtIndex:0];
NSArray *libraryPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSAllDomainsMask, YES); //所有library目录
NSString *libraryPath = [libraryPaths objectAtIndex:0];
NSString *filePath = [docDir stringByAppendingPathComponent:@"testFile.txt"];
[array writeToFile:filePath atomically:YES]; //写入文件
NSArray *arr = [[NSArray alloc] initWithContentsOfFile: filePath] 读取文件Path];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *testDirectory = [documentsDirectory stringByAppendingPathComponent:@"test"];
//创建目录
[fileManager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil];
//创建文件
NSString *testPath4 = [testDirectory stringByAppendingPathComponent:@"TEST44.txt"];
NSString *string = @"写入内容，write String";
[fileManager createFileAtPath:testPath4 contents:[string dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];
//遍历目录
NSArray *file = [fileManage subpathsAtPath:myDirectory];
NSArray *files = [fileManage subpathsOfDirectoryAtPath:myDirectory error:nil];
//更改到待操作的目录下
[fileManager changeCurrentDirectoryPath:[documentsDirectory stringByExpandingTildeInPath]];
//创建文件fileName文件名称，contents文件的内容，如果开始没有内容可以设置为nil，attributes文件的属性，初始为nil
NSString * fileName = @"testFileNSFileManager.txt";
NSData *data = [fileManager contentsAtPath:fileName];
[fileManager createFileAtPath:fileName contents:data attributes:nil];
[fileManager removeItemAtPath:fileName error:nil];