124 lines
3.4 KiB
Objective-C
124 lines
3.4 KiB
Objective-C
//
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// LXDanMuTrackView.m
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// LXAnimationTest
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//
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// Created by lianxiang on 2018/8/14.
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// Copyright © 2018年 com.giga.ios. All rights reserved.
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//
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#import "LXDanMuTrackView.h"
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@implementation LXDanMuTrackView
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- (instancetype)initWithFrame:(CGRect)frame{
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self = [super initWithFrame:frame];
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if (self) {
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[self dataConfig];
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}
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return self;
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}
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-(void)dataConfig{
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_showingArray = [[NSMutableArray alloc] init];
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_waitShowArray = [[NSMutableArray alloc] init];
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}
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- (void)appendWithCustomView:(UIView *)view{
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view.frame = CGRectMake(self.frame.size.width,view.frame.origin.y, view.frame.size.width,view.frame.size.height);
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view.center = CGPointMake(view.center.x, TRACK_HEIGHT/2);
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if (_showingArray.count) {
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UIView *lastView = [_showingArray lastObject];
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//最右侧的那条弹幕还没有完全出现在屏幕中
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if (CGRectGetMaxX(lastView.frame) + TRACK_HORIZONTAL_PADDING > self.frame.size.width || _waitShowArray.count) {
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//把这条弹幕加到等待数组中
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[_waitShowArray addObject:view];
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}else{
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//加入轨道
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[self addSubview:view];
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//加入展示数组
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[_showingArray addObject:view];
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}
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}else{
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[self addSubview:view];
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[_showingArray addObject:view];
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}
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}
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- (void)moveViewWithSpeed:(float)speed{
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//正在展示的弹幕自减一次
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for (UIView *view in _showingArray) {
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view.frame = CGRectMake(view.frame.origin.x - speed, view.frame.origin.y, view.frame.size.width, view.frame.size.height);
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}
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//正在展示的弹幕
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if (_showingArray.count){
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UIView *firstView = [_showingArray firstObject];
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UIView *lastView = [_showingArray lastObject];
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if (CGRectGetMaxX(firstView.frame) < 0) {
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//已移除屏幕 remove
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[firstView removeFromSuperview];
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[_showingArray removeObjectAtIndex:0];
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}
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if (_waitShowArray.count) {
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//最右侧的view 已经完全出现
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if (CGRectGetMaxX(lastView.frame) + TRACK_HORIZONTAL_PADDING <= self.frame.size.width) {
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//转移数组
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[_showingArray addObject:[_waitShowArray firstObject]];
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[_waitShowArray removeObjectAtIndex:0];
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[self addSubview:[_showingArray lastObject]];
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}
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}
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}
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}
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- (float)rightOutScreenWidth
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{
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float outScreenWidth = 0.0;
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//如果等待数组中有值
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if (_waitShowArray.count)
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{
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//先遍历所有等待数组中的view，累加长度和间距
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for (UIView *view in _waitShowArray)
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{
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outScreenWidth += view.frame.size.width + TRACK_HORIZONTAL_PADDING;
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}
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}
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//如果展示数组中有值
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if (_showingArray.count)
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{
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//拿出最右侧的view
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UIView *lastView = [_showingArray lastObject];
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//算出出屏宽
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float rightOutWidth = CGRectGetMaxX(lastView.frame) - self.frame.size.width;
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if (rightOutWidth < 0)
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{
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rightOutWidth = 0;
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}
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outScreenWidth += rightOutWidth;
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}
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return outScreenWidth;
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}
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//清理轨道
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- (void)cleanTrack
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{
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for (UIView *view in _showingArray)
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{
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[view removeFromSuperview];
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}
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[_showingArray removeAllObjects];
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[_waitShowArray removeAllObjects];
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}
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@end
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