numberWithFloat:10.1]; NSNumber *num3 = [NSNumber numberWithBool:YES]; NSNumber *num4 = @10; NSValue...(可以包装结构体) + (NSValue *)valueWithCGPoint:(CGPoint)point; + (NSValue *)valueWithCGVector:(CGVector)vector...; + (NSValue *)valueWithCGSize:(CGSize)size; + (NSValue *)valueWithCGRect:(CGRect)rect; CGPoint point...= CGPointMake(10,20); NSValue *value = [NSValue valueWithCGPoint:point]; NSLog(@"%@",value)
animation.duration = duration; NSMutableArray *values = [NSMutableArray array];[values addObject:[NSValue...(1, 1, 1.0)]]; [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.5, 0.5,...1.0)]]; [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(2, 2, 1.0)]];...(1, 1, 1.0)]]; [values3 addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.7, 0.7..., 1.0)]]; [values3 addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1, 1, 1.0)]];
NSValue 我们有时候需要将结构体存储在集合中,但不能直接坐到。 Foundation提供了NSValue类将结构体转换为对象,并把它存储在集合中。...将结构体包装成NSValue对象 + (NSValue *)valueWithPoint:(NSPoint)point; + (NSValue *)valueWithSize:(NSSize)size;...+ (NSValue *)valueWithRect:(NSRect)rect; 示例 CGPoint point = NSMakePoint(10, 20); NSValue *value = [...point = NSMakePoint(10, 20); NSValue *value = [NSValue valueWithPoint:point]; CGPoint getPoint = [value...*value = [NSValue valueWithBytes:&p objCType:@encode(Person)]; // 2.从NSValue中取出自定义的结构体变量 Person res
Objective-C提供了不少类可以帮助我们,比较常见的是NSNumber,NSValue和NSData。 NSValue主要就是将这些原生的数据封装成对象,方便我们进行存储访问。...:(void *)value; //此外还提供了对基本的尺寸范围相关的封装和解封 + (NSValue *)valueWithPoint:(NSPoint)point; + (NSValue *)valueWithSize...:(NSSize)size; + (NSValue *)valueWithRect:(NSRect)rect; + (NSValue *)valueWithEdgeInsets:(NSEdgeInsets...进行保存 NSValue *value = [NSValue valueWithPoint:point]; NSDictionary *dic = @{@"point" : value}; //从字典中获取...(pp)); 使用NSValue对自定义结构体进行封装和解封的示例代码如下。
//获取信息中的键盘尺寸和位置信息 let value:NSValue = info[UIKeyboardFrameBeginUserInfoKey] as! ...NSValue //获取键盘动画的时间信息 let value2:NSValue = info[UIKeyboardAnimationDurationUserInfoKey...NSValue let keyboardSize = value.CGRectValue() let height = keyboardSize.height ...let value2:NSValue = info[UIKeyboardAnimationDurationUserInfoKey] as! ...NSValue var time:NSTimeInterval=0 value2.getValue(&time) textViewBottom.constant
valueWithCGPoint:CGPointMake(0, SCREEN_HEIGHT/2-75)]; anima.toValue = [NSValue valueWithCGPoint:CGPointMake...*value1 = [NSValue valueWithCGPoint:CGPointMake(50, 50)]; NSValue *value2 = [NSValue valueWithCGPoint...:CGPointMake(kWindowWidth - 50, 50)]; NSValue *value3 = [NSValue valueWithCGPoint:CGPointMake(kWindowWidth...- 50, kWindowHeight-50)]; NSValue *value4 = [NSValue valueWithCGPoint:CGPointMake(50, kWindowHeight...-50)]; NSValue *value5 = [NSValue valueWithCGPoint:CGPointMake(50, 50)]; animation.values =
*value0 = [NSValue valueWithCGPoint:CGPointMake(0, SCREEN_HEIGHT/2-50)]; NSValue *value1 = [NSValue...valueWithCGPoint:CGPointMake(SCREEN_WIDTH/3, SCREEN_HEIGHT/2-50)]; NSValue *value2 = [NSValue valueWithCGPoint...:CGPointMake(SCREEN_WIDTH/3, SCREEN_HEIGHT/2+50)]; NSValue *value3 = [NSValue valueWithCGPoint:CGPointMake...(SCREEN_WIDTH*2/3, SCREEN_HEIGHT/2+50)]; NSValue *value4 = [NSValue valueWithCGPoint:CGPointMake(SCREEN_WIDTH...*2/3, SCREEN_HEIGHT/2-50)]; NSValue *value5 = [NSValue valueWithCGPoint:CGPointMake(SCREEN_WIDTH, SCREEN_HEIGHT
把这些视图保存在Aarray中 3、并随机给小球创建一个方向(一个很小的 CGPointMake量值),并用Barray保存这些方向addObject:[NSValue valueWithCGPoint...ARC4RAND_MAX * 2.0f - 1.0f; NSLog(@"%f %f",randomX,randomY); [ballDirectionArray addObject:[NSValue...for (int j = 0; j < ballArray.count; j++) { UIButton *btn = ballArray[j]; NSValue *val =...CGPoint p = [val CGPointValue]; p.x = vx; [ballDirectionArray setObject:[NSValue...利用NSValue也可以封装很多CG变量,并保存到数组中。 ?
*value0 = [NSValue valueWithCGPoint:CGPointMake(0, SCREEN_HEIGHT/2-50)]; NSValue *value1 = [NSValue...valueWithCGPoint:CGPointMake(SCREEN_WIDTH/3, SCREEN_HEIGHT/2-50)]; NSValue *value2 = [NSValue valueWithCGPoint...:CGPointMake(SCREEN_WIDTH/3, SCREEN_HEIGHT/2+50)]; NSValue *value3 = [NSValue valueWithCGPoint:CGPointMake...(SCREEN_WIDTH*2/3, SCREEN_HEIGHT/2+50)]; NSValue *value4 = [NSValue valueWithCGPoint:CGPointMake(...SCREEN_WIDTH*2/3, SCREEN_HEIGHT/2-50)]; NSValue *value5 = [NSValue valueWithCGPoint:CGPointMake(SCREEN_WIDTH
enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { mutableDic[[NSValue...]] = @(idx); }]; return [mutableDic copy]; } // 将字典转为数组 + (NSArray*)dic2Arr:(NSDictionary<NSValue...{ [mutableArr addObject:[NSNull null]]; } [dic enumerateKeysAndObjectsUsingBlock:^(NSValue...转为字典 (没有冲突的情况下,只需要 hash 一次)"); NSDictionary *dic = [self arr2Dic:arr]; if ([dic objectForKey:[NSValue..._Nullable)(targetObj)]]) { NSLog(@"key 存在"); } NSLog(@"测试是否可以还原数组"); NSArray<NSValue
animation.keyTimes = @[@0, @0.25, @0.5]; animation.values = @[[NSValue...valueWithCGPoint:CGPointMake(0, 0)], [NSValue valueWithCGPoint...:CGPointMake(200, 200)], [NSValue valueWithCGPoint:CGPointMake...饰设置每一段动画的速度, 不设置的话默认为匀速, 这个地方注意有几段动画就要设置段数+1个速度, 第一个一般是0, 如果有少写 后面的漏掉的部分动画就不会执行 values, 就是设置动画线路 内容是NSValue...:CGPointMake(200, 200)], [NSValue valueWithCGPoint:CGPointMake
而要想得到存地址,不存对象的效果,就要祭出整个工具库的灵魂函数: NSValue * key = [NSValue valueWithPointer: (__bridge const void * _Nullable...)(info.instance)]; 将对象转换为 NSValue,直接以 NSValue 为键,来标记对象。...另外,还有一点必须提一下, NSValue 是可以在反向转换为 oc 对象的,这有利于你在拿到工具库提供的泄露信息后,进一步定位和分析问题: UIViewController * vc = (UIViewController...:@selector(viewDidLoad) withOptions:AspectPositionAfter usingBlock:^(id info) { NSValue...* key = [NSValue valueWithPointer: (__bridge const void * _Nullable)(info.instance)];
position"; 13 basicAnimation.duration = 4.0f; 14 basicAnimation.fromValue = [NSValue...valueWithCGPoint:showView.center]; 15 basicAnimation.toValue = [NSValue valueWithCGPoint...14 keyFrameAnimation.duration = 4.0f; 15 16 keyFrameAnimation.values = @[[NSValue...valueWithCGPoint:showView.center], 17 [NSValue valueWithCGPoint:CGPointMake...[NSValue valueWithCGPoint:CGPointMake(200, 200)]]; 20 21 //设置动画结束位置 22 showView.center =
let point3 = CGPoint(x:60, y:300) 14 let point4 = CGPoint(x:280, y:300) 15 16 animation.values = [NSValue...(cgPoint:point1), NSValue(cgPoint:point2), 17 NSValue(cgPoint:point3), NSValue(cgPoint:point4)] 18
目的:采用CABasicAnimation 点击屏幕上的点来是实现图像的位置移动 并且位置能够不反弹 难点:1 通过动画的KeyPath找到layer的属性 2 通过NSValue...将点包装成对象 (下一点toValue的位置 对真正视图的改变) 包装的时候是【NSValue valueWithPoint】 取值的时候是...keyPath basic.duration = 3.0f; basic.keyPath = @"position"; //将下一点进行封装后 赋值给basic的下一点 NSValue...*mytoValue = [NSValue valueWithCGPoint:location]; basic.toValue = mytoValue; //设置能够呆在最后的位置不动...forKey:@"basic"]; } 代理动画的方法: -(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag { NSValue
valueWithCGRect:CGRectMake(0, 0, 200, 200)]; position 位置(中心点的改变) [NSValue valueWithCGPoint:CGPointMake...*pointV1 = [NSValue valueWithCGPoint:point1]; NSValue *pointV2 = [NSValue valueWithCGPoint:point2];...NSValue *pointV3 = [NSValue valueWithCGPoint:point3]; NSValue *pointV4 = [NSValue valueWithCGPoint:point4...valueWithCGPoint:rectLayer.frame.origin], [NSValue valueWithCGPoint:CGPointMake...valueWithCGPoint:CGPointMake(15, rectLayer.frame.origin.y + 100)], [NSValue
POPSpringAnimation *scale = [self pop_animationForKey:@"scale"]; if (scale) { scale.toValue = [NSValue...{ scale = [POPSpringAnimation animationWithPropertyNamed:kPOPViewScaleXY]; scale.toValue = [NSValue...POPSpringAnimation *scale = [self pop_animationForKey:@"scale"]; if (scale) { scale.toValue = [NSValue...{ scale = [POPSpringAnimation animationWithPropertyNamed:kPOPViewScaleXY]; scale.toValue = [NSValue...self pop_animationForKey:@"rotate"]; if (scale) { // 拉伸回1.0的完整尺寸 scale.toValue = [NSValue
保存这些数值,实现多个点间的动画效果,CABasicAnimation可看做是最多只有2个关键帧的CAKeyframeAnimation 属性: values:NSArray对象,里面的元素称为”关键帧”(NSValue...类型),动画对象会在指定的时间(duration)内,依次显示values数组中的每一个关键帧( NSValue) 例子: //设置动画属性 NSValue *p1 = [NSValue valueWithCGPoint...:CGPointMake(50, 150)]; NSValue *p2 = [NSValue valueWithCGPoint:CGPointMake(250, 150)]; NSValue *p3 =...[NSValue valueWithCGPoint:CGPointMake(50, 550)]; NSValue *p4 = [NSValue valueWithCGPoint:CGPointMake
POPSpringAnimation *scale = [POPSpringAnimation animationWithPropertyNamed:kPOPViewScaleXY]; scale.toValue = [NSValue...POPSpringAnimation *scale = [POPSpringAnimation animationWithPropertyNamed:kPOPViewScaleXY]; scale.toValue = [NSValue...我们设置了 toValue为 [NSValue valueWithCGPoint:CGPointMake(2, 2)] ,看起来可能会有点奇怪。...为什么我们要将{2,2}这个点(我们的X和Y拉伸值)放到一个NSValue对象中去?好吧,这就是Pop工作的方式,它期待传到toValue参数中的是一个准确类型的值。...它总是期待一个对象,在这个例子中,它想要一个CGPoint转化成的NSValue对象。不幸的是Pop的这个部分在文档中有点难懂,但随着开发者的贡献它也在变得更好。
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