NSThread_多线程开发 NSOperation 自带地图应用_路径导航 NSThread
//NSThread_多线程开发
#import "ViewController.h"
#define ROW 5
#define COLUMN 3
#define IMAGE_COUNT ROW*COLUMN
#define WIDTH 100//图片宽
#define HEIGHT WIDTH//图片高
@interface ViewController ()
{
NSMutableArray *_imageViews;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self layout];
}
- (void)layout
{
_imageViews = [NSMutableArray array];
for (int r = 0; r < COLUMN; r++) {
for (int c = 0; c < ROW; c++) {
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(18.75 + r * 118.75, 20 + c * 118.75, WIDTH, HEIGHT)];
imageView.backgroundColor = [UIColor orangeColor];
[self.view addSubview:imageView];
[_imageViews addObject:imageView];
}
}
//添加按钮
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.frame = CGRectMake(50, 500,275,30);
[button setTitle:@"加载图片" forState:UIControlStateNormal];
[button addTarget:self action:@selector(useMultiThread) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
}
- (void)updateImage : (NSArray *)arr
{
UIImage *image = [UIImage imageWithData:arr[0]];
UIImageView *imageView = _imageViews[[arr[1] intValue]];
imageView.image = image;
}
- (void)loadImage : (NSNumber *)index{
NSLog(@"%@", [NSThread currentThread].name);
if (![index isEqual:@14]) {
//如果当前进程不是最后一个，就休眠2秒
[NSThread sleepForTimeInterval:2];
}
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://i1.s2.dpfile.com/2009-12-16/3351675_b.jpg(700x700)/thumb.jpg"]];
NSArray *arrData = @[data,index];
[self performSelectorOnMainThread:@selector(updateImage:) withObject:arrData waitUntilDone:YES];
}
//- (void)useMultiThread
//{
// for (int i = 0; i < IMAGE_COUNT; i++) {
// NSThread *thread = [[NSThread alloc]initWithTarget:self selector:@selector(loadImage:) object:[NSNumber numberWithInt:i]];
// thread.name = [NSString stringWithFormat:@"我的线程：%d",i];
// [thread start];//启动
// }
//}
#pragma mark 改变线程优先级
//提高他被优先加载的几率，但是他也未必就第一个加载。1，其他进程是先启动的 2.网络状态我们没有办法修改
- (void)useMultiThread{
NSMutableArray *threads = [NSMutableArray array];
for(int i = 0; i < IMAGE_COUNT ; i++){
NSThread *thread = [[NSThread alloc]initWithTarget:self selector:@selector(loadImage:) object:[NSNumber numberWithInt:i]];
//设置优先级
if (i ==IMAGE_COUNT - 1){
thread.threadPriority = 1.0;
}
else{
thread.threadPriority = 0;
}
[threads addObject:thread];
}
for (int i = 0; i < IMAGE_COUNT; i++) {
NSThread *thread = threads[i];
[thread start];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
//
// ViewController.m
// NSOperation
//
// Created by DC020 on 15/12/24.
// Copyright (c) 2015年 Bill. All rights reserved.
//
#import "ViewController.h"
#define ROW 3
#define COLUMN 5
#define imageCount ROW*COLUMN
#define WIDTH 100
#define HEIGHT WIDTH
@interface ViewController ()
{
NSMutableArray *_imageViews;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self layout];
}
-(void)layout{
_imageViews = [NSMutableArray array];
for (int c = 0; c < COLUMN; c++) {
for (int r = 0; r<ROW; r++) {
UIImageView *image = [[UIImageView alloc]initWithFrame:CGRectMake(18.75+r*118.75, 20+c*118.75, WIDTH, HEIGHT)];
image.backgroundColor = [UIColor redColor];
[self.view addSubview:image];
[_imageViews addObject:image];
}
}
UIButton *button = [[UIButton alloc]initWithFrame:CGRectMake(50, 500, 275, 30)];
[button setTitle:@"加载图片" forState:UIControlStateNormal];
[button addTarget:self action:@selector(userMultiThread) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
}
-(void)updateImage:(NSArray *)arr{
UIImage *image = [UIImage imageWithData:arr[0]];
UIImageView *imageView = _imageViews[[arr[1] intValue]];
imageView.image = image;
}
-(void)loadImage:(NSNumber *)index{
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://b.zol-img.com.cn/desk/bizhi/image/7/2560x1600/1447404575613.jpg"]];
//更新UI界面，调用主线程队列
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[self updateImage:@[data,index]];
}];
}
-(void)userMultiThread{
//1.创建一个操作队列
NSOperationQueue *operationQueue = [[NSOperationQueue alloc]init];
operationQueue.maxConcurrentOperationCount = 5;//设置最大并发线程数;
//2.向队列添加操作
// for(int i = 0;i < imageCount; i++){
//方法1.创建操作块，添加到队列
// NSBlockOperation *blockOperation = [NSBlockOperation blockOperationWithBlock:^{
// [self loadImage:[NSNumber numberWithInt:i]];
// }];
// //向操作队列 添加 操作
// [operationQueue addOperation:blockOperation];
//方法2:祷文invocation
// NSInvocationOperation *invocationOperation = [[NSInvocationOperation alloc]initWithTarget:self selector:@selector(loadImage:) object:[NSNumber numberWithInt:i]];
// [operationQueue addOperation:invocationOperation];
//方法3：控制线程的执行顺序
NSBlockOperation *lastOp = [NSBlockOperation blockOperationWithBlock:^{
[self loadImage:@(imageCount - 1)];
}];
for (int j = 0; j < imageCount-1; j++) {
NSBlockOperation *normalOp = [NSBlockOperation blockOperationWithBlock:^{
[self loadImage:[NSNumber numberWithInt:j]];
}];
//设置依赖操作(普通依赖最后)
[normalOp addDependency:lastOp];
[operationQueue addOperation:normalOp];
}
[operationQueue addOperation:lastOp];
}
//}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
//
// ViewController.m
// 自带地图应用_路径导航
//
// Created by DC020 on 15/12/24.
// Copyright (c) 2015年 Bill. All rights reserved.
//
#import "ViewController.h"
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>
@interface ViewController (){
CLGeocoder *_geocoder;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
_geocoder = [[CLGeocoder alloc]init];
[self drawRoute];
}
-(void)drawRoute{
//根据“西安”进行地理编码
[_geocoder geocodeAddressString:@"西安市" completionHandler:^(NSArray *placemarks, NSError *error) {
//定位地标
CLPlacemark *clPlacemark1 = [placemarks firstObject];//一般来说第一个是关联度最高的
//定位地标转化为地图地标
MKPlacemark *mkPlacemark1 = [[MKPlacemark alloc]initWithPlacemark:clPlacemark1];
//注意：地理编码一次只能定位到一个位置
[_geocoder geocodeAddressString:@"哈尔滨市" completionHandler:^(NSArray *placemarks, NSError *error) {
CLPlacemark *clPlacemark2 = [placemarks firstObject];
MKPlacemark *mkplacemark2 = [[MKPlacemark alloc]initWithPlacemark:clPlacemark2];
//配置地图设置信息
NSDictionary *options =@{MKLaunchOptionsMapTypeKey:@(MKMapTypeStandard),MKLaunchOptionsDirectionsModeKey:MKLaunchOptionsDirectionsModeDriving};//将其转化成对象类型（加括号的意思）
//将地标转化成地图上的“点”
MKMapItem *mapItem1 = [[MKMapItem alloc]initWithPlacemark:mkPlacemark1];
MKMapItem *mapItem2 = [[MKMapItem alloc]initWithPlacemark:mkplacemark2];
//加载地图（点，设置的选项）
[MKMapItem openMapsWithItems:@[mapItem1,mapItem2] launchOptions:options];
}];
}];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
//
// ViewController.m
// NSThread
//
// Created by DC020 on 15/12/24.
// Copyright (c) 2015年 Bill. All rights reserved.
//
#import "ViewController.h"
@interface ViewController (){
//用于显示图片
UIImageView *_imageView;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self layout];
}
-(void)layout{
_imageView = [[UIImageView alloc]initWithFrame:[[UIScreen mainScreen]bounds] ];
_imageView.contentMode = UIViewContentModeScaleAspectFit;
[self.view addSubview:_imageView];
//下载按钮
UIButton *button = [[UIButton alloc]initWithFrame:CGRectMake(50, 500, 275, 30)];
[button setTitle:@"加载图片" forState:UIControlStateNormal];
[button addTarget:self action:@selector(loadImageWithMultiThread) forControlEvents:UIControlEventTouchUpInside];
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button setTitleColor:[UIColor grayColor] forState:UIControlStateHighlighted];
[self.view addSubview:button];
}
-(void)noNSThread{
//在资源下载加载的过程中，由于网络原因，有时候我们是很难保证下载时间的，如果不使用多线程可能用户完成一个下载操作需要很长时间的等待，而且在这个过程中无法进行其他操作。->阻塞
UIImage *image = [[UIImage alloc]initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString: @"http://i-7.vcimg.com/trim/867a1fe997bf3baeebbd223ae9aecdc8142598/trim.jpg"]]];
_imageView.image = image;
}
-(void)updateImageView:(NSData *) imageData{
UIImage *image = [UIImage imageWithData:imageData];
_imageView.image = image;
}
-(void)loadImage{
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://i-7.vcimg.com/trim/867a1fe997bf3baeebbd223ae9aecdc8142598/trim.jpg"]];
//注意只能在主线程上才能更新UI
//performSelectorOnMainThread是NSObject一个方法，每一个NSObject都有这个方法
[self performSelectorOnMainThread:@selector(updateImageView:) withObject:data waitUntilDone:YES];
}
#pragma mark 多线程下载图片
-(void)loadImageWithMultiThread{
//方法1:使用对象方法
//创建一个线程
// NSThread *thread1 = [[NSThread alloc]initWithTarget:self selector:@selector(loadImage) object:nil];
// [thread1 start];//启动一个线程，启动一个线程并不代表立即执行，而是出于就绪状态，当系统调度时才真正执行
//方法2：使用类方法
[NSThread detachNewThreadSelector:@selector(loadImage) toTarget:self withObject:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end