本程序是模拟子弹无限的弹出平移的动画效果
知识点:(难点)
0,masony自适应布局(下载地址:https://github.com/Masonry/Masonry)
1,循环创建等间距的View
2,向可变数组中添加和取出这些View
3,定时器
4,循环执行
5,循环执行平移
6,加速和减速
感谢金ML小姐的无私帮助,接下来直接上代码:
//
// ViewController.m
// 模拟炮弹的实现
//
// Created by WBapple on 16/8/23.
// Copyright © 2016年 王彬iOS开发者. All rights reserved.
//
#import "ViewController.h"
//适配
#import "Masonry.h"
#define MAS_SHORTHAND
#define MAS_SHORTHAND_GLOBALS
//按照iPhone6屏幕尺寸适配
// 转换宽度像素，将1080P转换成750P
#define changePixelW(P) (P / 1080.0) * 750.0
// 转换高度像素，将1080P转换成750P
#define changePixelH(P) (P / 1920.0) * 1334.0
// 将像素转换为点-宽度
#define pixelToPonitW(P) changePixelW(P) / 2.0
// 将像素转换为点-高度
#define pixelToPonitH(P) changePixelH(P) / 2.0
// 屏幕大小
#define kScreen [[UIScreen mainScreen] bounds]
// 屏幕宽度
#define kScreenW [[UIScreen mainScreen] bounds].size.width
// 屏幕高度
#define kScreenH [[UIScreen mainScreen] bounds].size.height
// 适配屏幕高度
#define FITHEIGHT(H) \
(pixelToPonitH(H)) / 667.0 * ([UIScreen mainScreen].bounds.size.height)
// 适配屏幕宽度
#define FITWIDTH(W) \
(pixelToPonitW(W)) / 375.0 * ([UIScreen mainScreen].bounds.size.width)
// 根据设备型号设置字体大小
#define iPhone6 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(750, 1334), [[UIScreen mainScreen] currentMode].size) : NO)
#define iPhone6P ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(1242, 2208), [[UIScreen mainScreen] currentMode].size) : NO)
//字体大小适配
#define pixelToFontsize(P) (iPhone6P ? (P / 2.0 / 96.0 * 72.0) : (iPhone6 ? (P / 1.2 / 2.0 / 96.0 * 72.0) : (P / 1.3 / 2.0 / 96.0 * 72.0)))
// 将像素转换为点-圆角
#define svCornerRadius(P) changePixelW(P) / 2.0
// 状态栏的高度
#define statusBarH [[UIApplication sharedApplication] statusBarFrame].size.height
//电池栏高度
#define StatusBarH [UIApplication sharedApplication].statusBarFrame.size.height
//导航栏高度
//#define NavBarH [UINavigationBar appearance].frame.size.height
#define NavBarH self.navigationController.navigationBar.height
@interface ViewController ()
@end
@implementation ViewController {
NSMutableArray* array;
UIView* view;
BOOL jay;
float speed;
}
- (void)viewDidLoad
{
//
UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(100, 0, 200, 200)];
label.text = @"点击屏幕出现子弹";
[self.view addSubview:label];
//
UIButton* button = [[UIButton alloc] initWithFrame:CGRectMake(30, 550, 150, 40)];
[button setTitle:@"加速" forState:UIControlStateNormal];
button.backgroundColor = [UIColor redColor];
button.titleLabel.font = [UIFont systemFontOfSize:pixelToFontsize(45)];
button.layer.cornerRadius = svCornerRadius(12);
[button addTarget:self
action:@selector(jiasu)
forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
//
UIButton* button2 = [[UIButton alloc] initWithFrame:CGRectMake(200, 550, 150, 40)];
[button2 setTitle:@"减速" forState:UIControlStateNormal];
button2.backgroundColor = [UIColor blueColor];
button2.titleLabel.font = [UIFont systemFontOfSize:pixelToFontsize(45)];
button2.layer.cornerRadius = svCornerRadius(12);
[button2 addTarget:self
action:@selector(jiansu)
forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button2];
//创建可变数组
array = [[NSMutableArray alloc] init];
[super viewDidLoad];
//创建炮弹
for (int i = 0; i < 1000; i++) {
view = [[UIView alloc] init];
view.backgroundColor = [UIColor redColor];
[self.view addSubview:view];
[view mas_makeConstraints:^(MASConstraintMaker* make) {
make.height.mas_equalTo(FITHEIGHT(30));
make.width.mas_equalTo(FITHEIGHT(30));
make.left.mas_equalTo(self.view.mas_left).with.offset(-FITHEIGHT(60000) + FITHEIGHT(60) * i);
make.centerY.equalTo(self.view);
}];
//把创建的View逐一添加到可变数组中
[array addObject:view];
}
//创建定时器
NSTimer* timer = [NSTimer timerWithTimeInterval:0.1
target:self
selector:@selector(changeViewframe)
userInfo:nil
repeats:YES];
// runloop循环执行
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
//speed默认值
speed = 10;
}
- (void)changeViewframe
{
CGAffineTransform ttransform;
for (int i = 0; i < array.count; i++) {
UIImageView* image = array[i];
if (!jay) {
ttransform = CGAffineTransformTranslate(image.transform, FITWIDTH(speed), 0);
image.transform = ttransform;
jay = YES;
}
else {
ttransform = CGAffineTransformTranslate(image.transform, FITWIDTH(speed), 0);
image.transform = ttransform;
jay = NO;
}
}
}
- (void)jiasu
{
speed += 10;
}
- (void)jiansu
{
speed -= 10;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end