iOS 支付寶首頁拖放按鈕效果實現
效果圖:
1.實現原理
將所有按鈕放在viewcontroller的_buttonArray集合中,同時賦值給按鈕中
增加長按手勢的響應
當手勢坐標進入其他按鈕的frame時,調整集合中按鈕位置;
當長按手勢開始,放大按鈕; 結束時還原按鈕
2.附源碼及注釋[按鈕調控已實現動畫]
@interface UIDragButton : UIButton {
CGPoint _prePoint; // 移動過程中的上一個點
BOOL _isPress; // 是否按下:實現過程未用到
CGPoint _framePoint; // 未放大情況下frame的左上角坐標
CGRect _frameRect; // 未放大情況下frame值
}
@property (nonatomic, assign) NSMutableArray *buttonArray; // button集合
@property (nonatomic, assign) NSInteger indexOfArray; // 當前按鈕在集合中的下標
// 移動動畫,實現過程未用到,暫不能用
- (void)moveTo:(CGRect)rect Animation:(BOOL)flag;
// 初始化一些樣式,即長按手勢
- (void)initStyle;
@end
.m
@implementation UIDragButton
/*
* 樣式初始化,即手勢初始化
**/
- (void)initStyle {
self.backgroundColor = [UIColor whiteColor];
self.layer.borderWidth = 0.3;
self.layer.borderColor = [UIColor grayColor].CGColor;
UILongPressGestureRecognizer * longPressGr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressToDo:)];
longPressGr.minimumPressDuration = 1.0;
[self addGestureRecognizer:longPressGr];
}
#pragma mark - 按鈕尺寸更改
// 放大
- (void)changeBig {
self.transform = CGAffineTransformScale(self.transform,1.25,1.25);
self.backgroundColor = [UIColor colorWithHexString:@"E0E0E0" alpha:1];
}
// 還原
- (void)changeBack {
self.transform = CGAffineTransformScale(self.transform,0.8,0.8);
// 按鈕放大還原后會有偏移,所以要設置回正常位置,80和100是按鈕尺寸
self.frame = CGRectMake(_framePoint.x, _framePoint.y, 80, 100);
}
#pragma mark - 手勢管理
/*
* 手勢響應,并判斷狀態
**/
- (void)longPressToDo:(UILongPressGestureRecognizer *)press {
if ([press state] == UIGestureRecognizerStateBegan) {
[self beganTouch:press];
[self changeBig]; // 放大
}
else if ([press state] == UIGestureRecognizerStateChanged) {
[self movedTouch:press];
}
else if ([press state] == UIGestureRecognizerStateEnded){
[self endedTouch:press];
}
}
/*
* 手勢長按開始
**/
- (void)beganTouch:(UILongPressGestureRecognizer *)press {
_prePoint = [press locationInView:self];
_frameRect = self.frame;
_framePoint = self.frame.origin;
// 該通知用于告訴controller點擊的是第幾個按鈕,用于將該按鈕放在最上層
[[NSNotificationCenter defaultCenter] postNotificationName:@"buttonChanged" object:[NSNumber numberWithInteger:_indexOfArray]];
}
/*
* 手勢長按結束
**/
- (void)endedTouch:(UILongPressGestureRecognizer *)press {
_prePoint = [press locationInView:self];
[self changeBack];
self.backgroundColor = [UIColor whiteColor];
}
/*
* 長按過程中移動
**/
- (void)movedTouch:(UILongPressGestureRecognizer *)press {
CGPoint now = [press locationInView:self];
NSInteger x = now.x - _prePoint.x;
NSInteger y = now.y - _prePoint.y;
self.frame = CGRectMake(self.frame.origin.x+x, self.frame.origin.y+y, self.frame.size.width, self.frame.size.height);
[self placeIsChanged:CGPointMake(self.frame.origin.x + _prePoint.x, self.frame.origin.y + _prePoint.y)];
}
#pragma mark - 按鈕調整
/*
* 判斷當前按鈕位置是否變化,并進行調整
**/
- (void)placeIsChanged:(CGPoint)point {
for (NSInteger i = 0; i < [self.buttonArray count]; i++) {
if ([self pointIn:point rect:((UIButton *)[_buttonArray objectAtIndex:i]).frame]
&& _indexOfArray != i) {
[self adjustButtons:i];
}
}
}
/*
* 判斷點是否在rect內
**/
- (BOOL)pointIn:(CGPoint)point rect:(CGRect)rect {
if (point.x > rect.origin.x && point.y > rect.origin.y && point.x < rect.origin.x+rect.size.width && point.y < rect.origin.y+rect.size.height) {
return YES;
}
return NO;
}
/*
* 調整按鈕位置
**/
- (void)adjustButtons:(NSInteger)index {
CGRect rect = ((UIButton *)[_buttonArray objectAtIndex:index]).frame;
__block NSInteger i = 0;
__block NSInteger num = index;
// 將靠前的按鈕移動到靠后的位置
if (_indexOfArray < index) {
// 將上一個按鈕的位置賦值給當前按鈕
[UIView animateWithDuration:0.5 animations:^{
for (i = num; i > _indexOfArray+1; i--) {
((UIDragButton *)[_buttonArray objectAtIndex:i]).frame = ((UIDragButton *)[_buttonArray objectAtIndex:i-1]).frame;
}
((UIDragButton *)[_buttonArray objectAtIndex:i]).frame = _frameRect;
}];
_frameRect = rect;
// 調整順序 保證數組中按鈕的frame按順序排列
for (i = _indexOfArray; i < index; i++) {
[_buttonArray exchangeObjectAtIndex:i withObjectAtIndex:i+1];
((UIDragButton *)[_buttonArray objectAtIndex:i]).indexOfArray = i;
}
((UIDragButton *)[_buttonArray objectAtIndex:index]).indexOfArray = index;
}
else { // 將靠后的按鈕移動到前邊
// 將上一個按鈕的位置賦值給當前按鈕
[UIView animateWithDuration:0.5 animations:^{
for (i = num; i < _indexOfArray-1; i++) {
((UIDragButton *)[_buttonArray objectAtIndex:i]).frame = ((UIDragButton *)[_buttonArray objectAtIndex:i+1]).frame;
}
((UIDragButton *)[_buttonArray objectAtIndex:i]).frame = _frameRect;
}];
_frameRect = rect;
// 調整順序 保證數組中按鈕的frame按順序排列
for (i = _indexOfArray; i > index; i--) {
[_buttonArray exchangeObjectAtIndex:i withObjectAtIndex:i-1];
((UIDragButton *)[_buttonArray objectAtIndex:i]).indexOfArray = i;
}
((UIDragButton *)[_buttonArray objectAtIndex:index]).indexOfArray = index;
}
_framePoint = _frameRect.origin;
}
#pragma mark - 按鈕移動動畫
- (void)moveTo:(CGRect)rect Animation:(BOOL)flag {
if (flag) {
// 計算偏移并移動
float x = rect.origin.x - self.frame.origin.x;
float y = rect.origin.y - self.frame.origin.y;
[self.layer addAnimation:[self moveX:0.1 X:[NSNumber numberWithFloat:x]] forKey:nil];
[self.layer addAnimation:[self moveY:0.1 Y:[NSNumber numberWithFloat:y]] forKey:nil];
}
else {
self.frame = rect;
}
}
- (CABasicAnimation *)moveX:(float)time X:(NSNumber *)x // 橫向移動
{
CABasicAnimation *animation=[CABasicAnimation animationWithKeyPath:@"transform.translation.x"];
animation.toValue=x;
animation.duration=time; // 動畫持續時間
animation.removedOnCompletion=NO;
animation.fillMode=kCAFillModeForwards;
return animation;
}
- (CABasicAnimation *)moveY:(float)time Y:(NSNumber *)y // 縱向移動
{
CABasicAnimation *animation=[CABasicAnimation animationWithKeyPath:@"transform.translation.y"];
animation.toValue=y;
animation.duration=time;
animation.removedOnCompletion=NO;
animation.fillMode=kCAFillModeForwards;
return animation;
}
@end
本文由用戶 jopen 自行上傳分享,僅供網友學習交流。所有權歸原作者,若您的權利被侵害,請聯系管理員。
轉載本站原創文章,請注明出處,并保留原始鏈接、圖片水印。
本站是一個以用戶分享為主的開源技術平臺,歡迎各類分享!