我这里是基于Masonry布局的
#import "floatView.h"
#import "UIView+Extension.h"
#import "Masonry.h"
@interface floatView ()
@property (nonatomic,strong)UIButton *spButton;
///拖动暂停位置
//@property(nonatomic,assign) CGPoint stopPoint;
///注释
@property(nonatomic,strong)UIView *otherView;
@end
1.创建按钮
- (UIButton *)spButton{
if (!_spButton) {
self.spButton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.spButton setImage:[UIImage imageNamed:@"shijianshangbao"] forState:UIControlStateNormal];
self.spButton.frame = CGRectMake([UIScreen mainScreen].bounds.size.width-71,300,66,66);;
self.spButton.backgroundColor = UIColor.brownColor;
self.spButton.tag = 0;
self.spButton.layer.cornerRadius = 8;
[self addSubview:self.spButton];
}
return _spButton;
}
2.给按钮添加手势
-(void)initAddEventBtn{
[self.spButton addTarget:self action:@selector(addEvent:) forControlEvents:UIControlEventTouchUpInside];
//添加手势
UIPanGestureRecognizer *panRcognize=[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGesture:)];
[panRcognize setMinimumNumberOfTouches:1];
[panRcognize setEnabled:YES];
[panRcognize delaysTouchesEnded];
[panRcognize cancelsTouchesInView];
[self.spButton addGestureRecognizer:panRcognize];
}
处理按钮点击处相对于屏幕的位置
- (void)addEvent:(UIButton *)btn{
btn.selected = !btn.selected;
UIWindow * window= [[[UIApplication sharedApplication] delegate] window];
CGRect rect = [btn convertRect: btn.bounds toView:window];
if (rect.origin.x>SCREEN_WIDTH/2) {
[self dealOtherViewOnRight:btn];
}else if (rect.origin.x<SCREEN_WIDTH/2){
[self dealOtherViewOnLeft:btn];
}
}
浮动按钮在屏幕右边时
- (void)dealOtherViewOnRight:(UIButton *)btn{
UIWindow * window= [[[UIApplication sharedApplication] delegate] window];
CGRect rect = [btn convertRect: btn.bounds toView:window];
if (btn.selected == YES) {
self.otherView.height = rect.size.height;
self.otherView.x = rect.origin.x;
self.otherView.width = 0;
self.otherView.centerY = btn.centerY;
[UIView animateWithDuration:0.5 animations:^{
self.otherView.frame = CGRectMake(rect.origin.x-200, rect.origin.y, 200, rect.size.height);
}];
}else{
[UIView animateWithDuration:0.5 animations:^{
self.otherView.frame = CGRectMake(rect.origin.x, rect.origin.y, 0, rect.size.height);
}];
}
}
浮动按钮在屏幕左边时
- (void)dealOtherViewOnLeft:(UIButton *)btn{
CGRect rect = btn.frame;
if (btn.selected == YES) {
self.otherView.height = rect.size.height;
self.otherView.x = rect.origin.x+rect.size.width;
self.otherView.width = 0;
self.otherView.centerY = btn.centerY;
[UIView animateWithDuration:0.5 animations:^{
self.otherView.frame = CGRectMake(rect.origin.x+rect.size.width, rect.origin.y, 200, rect.size.height);
}];
}else{
[UIView animateWithDuration:0.5 animations:^{
self.otherView.frame = CGRectMake(rect.origin.x+rect.size.width, rect.origin.y, 0, rect.size.height);
}];
}
}
重点来了，移动位置的处理
- (void)handlePanGesture:(UIPanGestureRecognizer *)recognizer
{
//移动状态
UIGestureRecognizerState recState = recognizer.state;
switch (recState) {
case UIGestureRecognizerStateBegan:
break;
case UIGestureRecognizerStateChanged:
{
CGPoint translation = [recognizer translationInView:[self getCurrentVC].navigationController.view];
recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y + translation.y);
}
break;
case UIGestureRecognizerStateEnded:
{
CGPoint stopPoint = CGPointMake(0, SCREEN_HEIGHT / 2.0);
if (recognizer.view.center.x < SCREEN_WIDTH / 2.0) {
if (recognizer.view.center.y <= SCREEN_HEIGHT/2.0) {
//左上
if (recognizer.view.center.x >= recognizer.view.center.y) {
stopPoint = CGPointMake(recognizer.view.center.x, self.spButton.width/2.0);
}else{
stopPoint = CGPointMake(self.spButton.width/2.0, recognizer.view.center.y);
}
}else{
//左下
if (recognizer.view.center.x >= SCREEN_HEIGHT - recognizer.view.center.y) {
stopPoint = CGPointMake(recognizer.view.center.x, SCREEN_HEIGHT - self.spButton.width/2.0);
}else{
stopPoint = CGPointMake(self.spButton.width/2.0, recognizer.view.center.y);
}
}
}else{
if (recognizer.view.center.y <= SCREEN_HEIGHT/2.0) {
//右上
if (SCREEN_WIDTH - recognizer.view.center.x >= recognizer.view.center.y) {
stopPoint = CGPointMake(recognizer.view.center.x, self.spButton.width/2.0);
}else{
stopPoint = CGPointMake(SCREEN_WIDTH - self.spButton.width/2.0, recognizer.view.center.y);
}
}else{
//右下
if (SCREEN_WIDTH - recognizer.view.center.x >= SCREEN_HEIGHT - recognizer.view.center.y) {
stopPoint = CGPointMake(recognizer.view.center.x, SCREEN_HEIGHT - self.spButton.width/2.0);
}else{
stopPoint = CGPointMake(SCREEN_WIDTH - self.spButton.width/2.0,recognizer.view.center.y);
}
}
}
//如果按钮超出屏幕边缘
if (stopPoint.y + self.spButton.width+40>= SCREEN_HEIGHT) {
stopPoint = CGPointMake(stopPoint.x, SCREEN_HEIGHT - self.spButton.width/2.0-49);
NSLog(@"超出屏幕下方了！！"); //这里注意iphoneX的适配。。X的SCREEN高度算法有变化。
}
if (stopPoint.x - self.spButton.width/2.0 <= 0) {
stopPoint = CGPointMake(self.spButton.width/2.0+5, stopPoint.y);
NSLog(@"超出屏幕左边了！！");
}
if (stopPoint.x + self.spButton.width/2.0 >= SCREEN_WIDTH) {
// break;
stopPoint = CGPointMake(SCREEN_WIDTH - self.spButton.width/2.0-5, stopPoint.y);
NSLog(@"超出屏幕右边了！！");
}
if (stopPoint.y - self.spButton.width/2.0 <= 0) {
stopPoint = CGPointMake(stopPoint.x, self.spButton.width/2.0);
}
[UIView animateWithDuration:0.5 animations:^{
recognizer.view.center = stopPoint;
}];
}
break;
default:
break;
}
[recognizer setTranslation:CGPointMake(0, 0) inView:self];
}
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