IOS开发之UI手势

时间 2019-12-05

标签 ios 开发手势栏目 iOS 繁體版

原文原文链接

点击手势和双击手势ui
#import "TapViewController.h"spa
@interface TapViewController ().net
@end 3d
@implementation TapViewControllerorm
- (void)viewDidLoad {对象
[super viewDidLoad];继承
// Do any additional setup after loading the view.事件
//点击手势:图片
//=================单击===========ip
//1.建立一个点击手势对象
//UIGestureRecognizer是全部手势的父类，通常不会直接使用哪一个它
//而是使用它的子类
//参数1:响应手势的对象;
//参数2:响应的消息
//功能:发生点击动做，对象去响应这个手势
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer
alloc]initWithTarget:self action:@selector(tapGesture:)];
//2.添加手势到指定的视图上(任何手势均可以添加到任何继承自UIView的类的对象上)
[self.view addGestureRecognizer:tapGesture];
//=================双击===========
//1.建立点击对象
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]
initWithTarget:self action:@selector(doubleTap:)];
//2.设置点击次数
doubleTap.numberOfTapsRequired = 2;
//4.忽略其余手势
//单击的时候忽略双击;
[tapGesture requireGestureRecognizerToFail:doubleTap];
//3.将手势添加到指定的视图控制器上
[self.view addGestureRecognizer:doubleTap];
}
#pragma mark -单击手势响应
- (void)tapGesture:(UITapGestureRecognizer *)tap{
//获取点击手势的坐标
CGPoint point = [tap locationInView:self.view];
// NSLog(@"%@",NSStringFromCGPoint(point));
NSLog(@"单击");
}
#pragma mark - 双击事件响应
- (void)doubleTap:(UIGestureRecognizer *)doubleTap{
//获取点击手势的坐标
CGPoint point = [doubleTap locationInView:self.view];
//NSLog(@"%@",NSStringFromCGPoint(point));
NSLog(@"双击");
}
@end

长按手势:关键在于设置手势的时间

#import "LongPressViewController.h"

@interface LongPressViewController ()

@end

@implementation LongPressViewController

- (void)viewDidLoad {

[super viewDidLoad];

//1.建立长按手势对象

UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];

//3.设置长按时间

longPress.minimumPressDuration = 1;

//2.将手势添加到视图控制器上;

[self.view addGestureRecognizer:longPress];

}

#pragma mark -响应长按手势

//这个方法在手势的状态发生改变的时候调用

- (void)longPress : (UILongPressGestureRecognizer *)longPress{

//手势的状态:(针对全部的手势都适用)

//UIGestureRecognizerStateBegan:手势开始

//UIGestureRecognizerStateChanged:手势改变

//UIGestureRecognizerStateEnded:手势结束

//longPress setState:<#(UIGestureRecognizerState)#>

if (longPress.state == UIGestureRecognizerStateBegan) {

NSLog(@"长按");

}

// NSLog(@"长按");

}

@end

滑动手势：关键在于设置滑动的方向

#import "SwipeViewController.h"

@interface SwipeViewController ()

@end

@implementation SwipeViewController

- (void)viewDidLoad {

[super viewDidLoad];

//1.建立滑动手势对象

UISwipeGestureRecognizer *swip = [[UISwipeGestureRecognizer alloc]

initWithTarget:self action:@selector(swipGesture:)];

//3.滑动方向

//注意:若是想要能够两个方向均可以，滑动方向必须添加一个右划的手势

[swip setDirection:UISwipeGestureRecognizerDirectionLeft];

//2.将手势添加到视图控制器上

[self.view addGestureRecognizer:swip];

//=============右划默认是从左向右滑动==========

UISwipeGestureRecognizer *swipRight = [[UISwipeGestureRecognizer alloc]

initWithTarget:self action:@selector(swipGesture:)];

// [swip setDirection:UISwipeGestureRecognizerDirectionRight];

[self.view addGestureRecognizer:swipRight];

}

#pragma mark - 滑动手势响应事件

- (void)swipGesture:(UISwipeGestureRecognizer *)swipGesture{

if (swipGesture.direction == UISwipeGestureRecognizerDirectionRight) {

NSLog(@"右滑回到下一页");

}else{

NSLog(@"左滑到上一页");

}

@end

拖动手势

#import "PanViewController.h"

@interface PanViewController ()

@end

@implementation PanViewController

- (void)viewDidLoad {

[super viewDidLoad];

//1.建立拖动手势对象

UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc]

initWithTarget:self action:@selector(pan:)];

//2.添加到视图

[self.imageView addGestureRecognizer:panGesture];

}

//这个方法会在拖动过程当中时时调用;

#pragma mark - 拖动手势方法

- (void)pan:(UIPanGestureRecognizer *)pan{

self.imageView.center = [pan locationInView:self.view];

NSLog(@"拖动");

}

@end

旋转手势：

#import "RotationViewController.h"

@interface RotationViewController ()

@end

@implementation RotationViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view.

//1.建立旋转手势对象

UIRotationGestureRecognizer *rotatioin = [[UIRotationGestureRecognizer alloc]

initWithTarget:self action:@selector(rotationG:)];

//2.添加到视图上

[self.imageView addGestureRecognizer:rotatioin];

}

#pragma mark - 旋转手势事件

- (void) rotationG:(UIRotationGestureRecognizer *)ro{

static CGFloat lastRotation = 0;

//® self.imageView.center = [rotation locationInView:self.view];

CGFloat triangle = ro.rotation + lastRotation;

self.imageView.transform = CGAffineTransformMakeRotation(triangle);

if (ro.state == UIGestureRecognizerStateEnded) {

lastRotation = ro.rotation + lastRotation;

}

NSLog(@"旋转");

}

@end

缩放手势

#import "PinchViewController.h"

@interface PinchViewController ()

@end

@implementation PinchViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view.

//1.建立pinch手势对象

UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]

initWithTarget:self action:@selector(pinchGesture:)];

//2.添加到视图上

[self.view addGestureRecognizer:pinch];

}

- (void)pinchGesture:(UIPinchGestureRecognizer *)pinch{

static CGFloat lastScale =1;

CGFloat scale = pinch.scale;

//3.经过手势的缩放比例去改变图片的缩放形变;

[self.imageView setTransform:CGAffineTransformMakeScale(scale, scale)];

if (pinch.state == UIGestureRecognizerStateEnded) {

lastScale = pinch.scale * lastScale;

}

NSLog(@"缩放");

}

@end