-
lsyyyy
- 我按老师的敲完之后按按钮怎么没反应有人遇到了相同的情况么
//
// BulletManager.m
// CommentDemo
//
// Created by MacBook on 2017/12/1.
// Copyright © 2017年 SimonWest. All rights reserved.
//
#import "BulletManager.h"
#import "BulletView.h"
@interface BulletManager()
@property (nonatomic, strong) NSMutableArray *dataSource;
@property (nonatomic, strong) NSMutableArray *bulletComment;
@property (nonatomic, strong) NSMutableArray *bulletViews;
@property (nonatomic, assign) BOOL bStopAnimation;
@end
@implementation BulletManager
- (instancetype)init {
if(self = [super init]) {
self.bStopAnimation = YES;
}
return self;
}
- (void)start {
if(!self.bStopAnimation) {
return;
}
self.bStopAnimation = NO;
[self.bulletComment removeAllObjects];
[self.bulletComment addObjectsFromArray:self.dataSource];
[self initBulletComment];
}
- (void)stop {
if(self.bStopAnimation) {
return;
}
self.bStopAnimation = YES;
[self.bulletViews enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
BulletView *view = obj;
[view stopAnimation];
view = nil;
}];
[self.bulletViews removeAllObjects];
}
- (void)initBulletComment {
NSMutableArray *trajectorys = [NSMutableArray arrayWithArray:@[@(0),@(1),@(2)]];
for (int i = 0; i < 3; i++) {
if(self.bulletComment.count <= 0) {
break;
}
NSInteger index = arc4random() % trajectorys.count;
int trajectory = [[trajectorys objectAtIndex:index] intValue];
[trajectorys removeObjectAtIndex:index];
NSString *comment = [self.bulletComment firstObject];
[self.bulletComment removeObject:comment];
[self createBulletView:comment trajectory:trajectory];
}
}
- (void)createBulletView:(NSString *)comment trajectory:(int)trajectory {
if(self.bStopAnimation) {
return;
}
BulletView *bulletView = [[BulletView alloc] initWithComment:comment];
bulletView.trajectory = trajectory;
__weak typeof(bulletView) weakView = bulletView;
__weak typeof(self) weakSelf = self;
bulletView.moveStatusBlock = ^(MoveStataus status){
if(weakSelf.bStopAnimation) {
return ;
}
switch (status) {
case Start:{
[weakSelf.bulletViews addObject:weakView];
break;
}
case Enter:{
NSString *comment = [weakSelf nextComment];
if(comment) {
[weakSelf createBulletView:comment trajectory:trajectory];
}
break;
}
case End:{
if([weakSelf.bulletViews containsObject:weakView]) {
[weakView stopAnimation];
[weakSelf.bulletViews removeObject:weakView];
}
if(weakSelf.bulletViews.count == 0) {
weakSelf.bStopAnimation = YES;
[weakSelf start];
}
break;
}
}
};
if(self.generateViewBlock) {
self.generateViewBlock(bulletView);
}
}
- (NSString *)nextComment {
if(self.bulletComment.count == 0) {
return nil;
}
NSString *comment = [self.bulletComment firstObject];
if(comment) {
[self.bulletComment removeObjectAtIndex:0];
}
return comment;
}
- (NSMutableArray *)dataSource {
if(!_dataSource) {
_dataSource = [NSMutableArray arrayWithObjects:@"弹幕1=========",@"弹幕2=========",@"弹幕3===========================",@"弹幕4=========",@"弹幕5=========",@"弹幕6=========",@"弹幕7==", nil];
}
return _dataSource;
}
- (NSMutableArray *)bulletComment {
if(!_bulletComment) {
_bulletComment = [NSMutableArray array];
}
return _bulletComment;
}
- (NSMutableArray *)bulletViews {
if(!_bulletViews) {
_bulletViews = [NSMutableArray array];
}
return _bulletViews;
}
@end
- 2017-09-23 1回答·1247浏览
-
慕丝4300860
- 初始化弹幕，随机分配弹幕轨迹的时候self.bulletComments弹幕数组已经移除数据了，为什么弹幕开始执行初始化的时候还要[self.bulletComments removeAllObjects];
只是确保真的把所有元素都移除了
- 2016-11-29 1回答·1554浏览
-
慕丝4300860
- 小白提问~
self.bulletComments 是临时的数据存储对象，没次都是取出第一个元素，并移除数组中的第一个元素，为了确保start的时候都是新的数据源，所以要[self.bulletComments removeAllObjects];
- 2016-11-29 1回答·1327浏览
-
陈小舟
- _block在哪里有定义
block里面需要修改的变量，外面用__block声明一下才可以。因为block的本质变量这块相当于宏替换，__block声明了才可以修改
- 2016-08-30 1回答·1249浏览
-
qq_开水_03765982
- 弹幕数据源模型怎么写呀？有没有大神指点下～～
- 2016-08-03 0回答·1085浏览
-
灵雨静枫
- 遇到一个曾未见过的bug
你们可以试试
- 2016-08-01 5回答·1463浏览
-
gui0704
- 例子存在的问题
每条轨迹应该要单独管理，数据append 上去的时候 ，只是保存到队列中，每条弹幕完全显示在屏幕上后要回调事件，然后队列出队，再开始动画过程
- 2016-07-30 2回答·1091浏览
-
qq_谁动了我的时间_0
- 没有源码吗？
仿写的代码 供大家学习 https://github.com/flappyFeline/BulletView
- 2016-07-28 2回答·1216浏览
