1:运行程序报the file couldn't be opened because you don't have permission to view it
解决办法:项目—>targets->build settings->build options->changed the value of the "Compiler for C/C++/Objective-C" to Default Compiler.
2:百度地图引用
1.1如图引用的是.framework形式开发包时,引入的命名空间则是
#import <BaiduMapAPI/BMapKit.h>//引入所有的头文件
#import <BaiduMapAPI/BMKMapView.h>//只引入所需的单个头文件
如果是引入用的是.a形式开发包时,引入的命名空间则是
#import “BMapKit.h"
1.2百度地图现在提供的两个.framework的包,一个是真机一个是测试机,可以使用终端的命令把它合成一个;
3:自定义大头针百度地图
- (void)viewDidLoad {
[super viewDidLoad];
//百度地图初始化
_mapView=[[BMKMapView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT-NAVBARHEIGHT)];
_mapView.delegate=self;
[self.view addSubview:_mapView];
//标出坐标点
[self addPointAnnotation];
}
//添加标注
- (void)addPointAnnotation
{
for (int i=0; i<self.coordinates.count; i++) {
coordinateBean *model=self.coordinates[i];
BMKPointAnnotation* pointAnnotation = [[BMKPointAnnotation alloc]init];
CLLocationCoordinate2D coor;
coor.latitude = model.latitude;
coor.longitude = model.longitude;
pointAnnotation.coordinate = coor;
//通过title来起到传值的作用
pointAnnotation.title=[NSString stringWithFormat:@"%d",i];
[_mapView addAnnotation:pointAnnotation];
//显示弹出窗
[_mapView selectAnnotation:pointAnnotation animated:YES];
//判断那个是中心,没有则0必传参数
if (i==self.selectIndex) {
BMKCoordinateRegion region; ////表示范围的结构体
region.center.latitude = model.latitude;// 中心中
region.center.longitude = model.longitude;
region.span.latitudeDelta = 0;//经度范围(设置为0.1表示显示范围为0.2的纬度范围)
region.span.longitudeDelta = 0;//纬度范围
[_mapView setRegion:region];
}
}
}
//处理自定义弹出视图
- (BMKAnnotationView *)mapView:(BMKMapView *)mapView viewForAnnotation:(id <BMKAnnotation>)annotation
{
if ([annotation isKindOfClass:[BMKPointAnnotation class]]) {
BMKPinAnnotationView *newAnnotationView = [[BMKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"myrenameMark"];
newAnnotationView.pinColor = BMKPinAnnotationColorPurple;
newAnnotationView.animatesDrop = YES;// 设置该标注点动画显示
newAnnotationView.image = [UIImage imageNamed:self.mapPointImageName]; //把大头针换成别的图片
int selectIndex=[((BMKPointAnnotation *)annotation).title intValue];
//获得值
coordinateBean *model=[self.coordinates objectAtIndex:[((BMKPointAnnotation *)annotation).title intValue]];
UIView *popView=[[UIView alloc]initWithFrame:CGRectMake(0, 3, 100, 20)];
UIImage *img=[UIImage imageNamed:@"mapViewBackground"];
UIEdgeInsets edge=UIEdgeInsetsMake(0, 20, 0, 10);
img=[img resizableImageWithCapInsets:edge resizingMode:UIImageResizingModeStretch];
UIImageView *myimage=[[UIImageView alloc] initWithImage:img];
myimage.frame=CGRectMake(30, 0, 100, 40);
myimage.userInteractionEnabled=YES;
[popView addSubview:myimage];
//自定义显示的内容
UILabel *driverName = [[UILabel alloc]initWithFrame:CGRectMake(0, 3, 100, 15)];
driverName.backgroundColor=[UIColor clearColor];
driverName.text=model.title;
driverName.font = [UIFont systemFontOfSize:12];
driverName.textColor = [UIColor blackColor];
driverName.textAlignment = NSTextAlignmentLeft;
[myimage addSubview:driverName];
UILabel *carName = [[UILabel alloc]initWithFrame:CGRectMake(0, 18, 100, 15)];
carName.backgroundColor=[UIColor clearColor];
carName.text=model.comments;
carName.font = [UIFont systemFontOfSize:12];
carName.textColor = [UIColor blackColor];
carName.textAlignment = NSTextAlignmentLeft;
[myimage addSubview:carName];
BMKActionPaopaoView *pView = [[BMKActionPaopaoView alloc]initWithCustomView:popView];
pView.frame = CGRectMake(0, 0, 100, 40);
((BMKPinAnnotationView*)newAnnotationView).paopaoView = nil;
((BMKPinAnnotationView*)newAnnotationView).paopaoView = pView;
newAnnotationView.tag=selectIndex+10;
return newAnnotationView;
}
return nil;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/**
* @author wujunyang, 15-05-12 13:05:05
*
* @brief 跟对百度地图的处理
* @param animated <#animated description#>
*/
-(void)viewWillAppear:(BOOL)animated
{
[_mapView viewWillAppear];
_mapView.delegate=self;
_locationService.delegate=self;
}
/**
* @author wujunyang, 15-01-06 10:01:53
*
* 跟对百度地图的处理
*
* @param animated <#animated description#>
*/
-(void)viewWillDisappear:(BOOL)animated
{
[_mapView viewWillDisappear];
_mapView.delegate=nil;
_locationService.delegate=nil;
}
其中有个自定义model:
@interface coordinateBean : NSObject
//纬度
@property(assign,nonatomic)float latitude;
//经度
@property(assign,nonatomic)float longitude;
//标题
@property(strong,nonatomic)NSString *title;
//注解
@property(strong,nonatomic)NSString *comments;
@end
4:自动隐藏和显示工具栏和导航条
toolbar属性、toolbarItems与上一讲的navigationBar、navigationItem类似。只不过toolbarItems没有navigationItem的左右区分,它就自己一个人在做事,相当于没有下属。可以在toolbar上设置很多,比如背景颜色、背景图片、背景样式、大小位置(不过有些貌似设置无效),当然和navigationBar一样,对于它的是否显示和隐藏是由它的老爸即navigationController控制的。
所以[self.navigationController setNavigationBarHidden:YES animated:YES];也会把底部的toolBarItems给隐藏起来,如果要隐藏导航又不想底部toolBarItems被隐藏掉,可以用普通的view替代toolBarItems;
首先在viewDidLoad里设置toolBarHidden = NO, 默认是YES(隐藏的)
为了让toolbar显示,需要设置为NO(不隐藏)。
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"隐藏导航栏";
// self.toolbarItems
self.navigationController.toolbar.barStyle = self.toolBar.barStyle;
self.navigationController.toolbarHidden = NO;
[self.navigationController.toolbar setTranslucent:YES];
self.toolbarItems = [[[NSMutableArray alloc] initWithArray:self.toolBar.items] autorelease];
}
在点击中间button的时候的显示和隐藏navigation bar和toolBar
实现代码如下:
- (IBAction)toggleNavigationBar:(id)sender
{
//Check the current state of the navigation bar...
BOOL navBarState = [self.navigationController isNavigationBarHidden];
//Set the navigationBarHidden to the opposite of the current state.
[self.navigationController setNavigationBarHidden:!navBarState animated:YES];
[self.navigationController setToolbarHidden:!navBarState animated:YES];
//Change the label on the button.
if (navBarState)
{
[button setTitle:@"隐藏 Navigationr and toolbar" forState:UIControlStateNormal];
[button setTitle:@"隐藏 Navigation Bar toolbar" forState:UIControlStateHighlighted];
}
else
{
[button setTitle:@"显示 Navigation Bar toolbar" forState:UIControlStateNormal];
[button setTitle:@"显示 Navigation Bar toolbar" forState:UIControlStateHighlighted];
}
}
5:View代码结构的一些建议
在viewDidload里面只做addSubview的事情,然后在viewWillAppear里面做布局的事情,最后在viewDidAppear里面做Notification的监听之类的事情。至于属性的初始化,则交给getter去做。
@interface CustomObject()
@property (nonatomic, strong) UILabel *label;
@end
@implement
#pragma mark - life cycle
- (void)viewDidLoad
{
[super viewDidLoad];
[self.view addSubview:self.label];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.label.frame = CGRectMake(1, 2, 3, 4);
}
#pragma mark - getters and setters
- (UILabel *)label
{
if (_label == nil) {
_label = [[UILabel alloc] init];
_label.text = @"1234";
_label.font = [UIFont systemFontOfSize:12];
... ...
}
return label;
}
@end
注意:*重点,在get方法里面不能写self.noLabel;千万不要用“点”语法,这样会造成get方法死循环,因为“点”语法就是调用的get方法,所以要用下划线属性名的方法得到对象(在内存这其实是一个指针)。
@interface MasonryViewController ()
@property(nonatomic,strong)UIView *conView;
@property(nonatomic,assign)int intstate;
@end
@implementation MasonryViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self.view addSubview:self.conView];
}
//懒加载
-(UIView *)conView
{
if(_conView==nil)
{
_conView=[[UIView alloc]init];
_conView.backgroundColor=[UIColor redColor];
}
return _conView;
}
-(int)intstate
{
_intstate=0;
return _intstate;
}
//布局约束
-(void)viewDidLayoutSubviews
{
[self.conView mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.view.mas_top).with.offset(100);
make.left.equalTo(self.view.mas_left).with.offset(60);
make.right.equalTo(self.view.mas_right).with.offset(0);
make.height.equalTo(@50);
}];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
6: iOS中的生成随机数方法
生成0-x之间的随机正整数
int value =arc4random_uniform(x + 1);
生成随机正整数
int value = arc4random()
通过arc4random() 获取0到x-1之间的整数的代码如下:
int value = arc4random() % x;
获取1到x之间的整数的代码如下:
int value = (arc4random() % x) + 1;
最后如果想生成一个浮点数,可以在项目中定义如下宏:
#define ARC4RANDOM_MAX 0x100000000
然后就可以使用arc4random() 来获取0到100之间浮点数了(精度是rand()的两倍),代码如下:
double val = floorf(((double)arc4random() / ARC4RANDOM_MAX) * 100.0f);
实例(从数组中随机显示出一个背景图,再通过网络加载显示出来):
self.bgView=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
self.bgView.image=[UIImage imageNamed:@"AppBg"];
[self.view addSubview:self.bgView];
[self.view sendSubviewToBack:self.bgView];
NSDictionary *params=[[NSDictionary alloc] init];
[[HomeMainNetAPIManager sharedManager] getBackgroundImage:params andBlock:^(id data, NSError *error) {
if (!error&&data) {
BackgroundImageBean *groundImagebean =(BackgroundImageBean *)data;
int dataNum=groundImagebean.data.count;
if (groundImagebean.data&&dataNum>0) {
int r=arc4random_uniform(dataNum);
GroundImageBean *curBean=groundImagebean.data[r];
[self.bgView sd_setImageWithURL:[NSURL URLWithString:curBean.ImgUrl] placeholderImage:[UIImage imageNamed:@"AppBg"] completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
dispatch_async(dispatch_get_main_queue(), ^{
self.bgView.image=image;
});
}];
}
}
}];
7:沙盒路径知识整理
模拟器的路径从之前的~/Library/Application Support/iPhone Simulator移动到了~/Library/Developer/CoreSimulator/Devices/
文件都在个人用户名文件夹下的一个隐藏文件夹里,中文叫资源库,他的目录其实是Library。
因为应用是在沙箱(sandbox)中的,在文件读写权限上受到限制,只能在几个目录下读写文件:
Documents:应用中用户数据可以放在这里,iTunes备份和恢复的时候会包括此目录
tmp:存放临时文件,iTunes不会备份和恢复此目录,此目录下文件可能会在应用退出后删除
Library/Caches:存放缓存文件,iTunes不会备份此目录,此目录下文件不会在应用退出删除
iTunes在与iPhone同步时,备份所有的Documents和Library文件。
iPhone在重启时,会丢弃所有的tmp文件。
查看方法:
方法1、可以设置显示隐藏文件,然后在Finder下直接打开。设置查看隐藏文件的方法如下:打开终端,输入命名
(1)显示Mac隐藏文件的命令:defaults write com.apple.finder AppleShowAllFiles -bool true
(2)隐藏Mac隐藏文件的命令:defaults write com.apple.finder AppleShowAllFiles -bool false
(3)输完单击Enter键,退出终端,重新启动Finder就可以了 重启Finder:鼠标单击窗口左上角的苹果标志-->强制退出-->Finder-->
现在能看到资源库文件夹了。
打开资源库后找到/Application Support/iPhone Simulator/文件夹。这里面就是模拟器的各个程序的沙盒目录了。
方法2、这种方法更方便,在Finder上点->前往->前往文件夹,输入/Users/username/Library/Application Support/iPhone Simulator/ 前往。
username这里写用户名。
自定义类返回各目录路径:
#import <Foundation/Foundation.h>
@interface ICSandboxHelper : NSObject
+ (NSString *)homePath; // 程序主目录,可见子目录(3个):Documents、Library、tmp
+ (NSString *)appPath; // 程序目录,不能存任何东西
+ (NSString *)docPath; // 文档目录,需要ITUNES同步备份的数据存这里,可存放用户数据
+ (NSString *)libPrefPath; // 配置目录,配置文件存这里
+ (NSString *)libCachePath; // 缓存目录,系统永远不会删除这里的文件,ITUNES会删除
+ (NSString *)tmpPath; // 临时缓存目录,APP退出后,系统可能会删除这里的内容
+ (BOOL)hasLive:(NSString *)path; //判断目录是否存在,不存在则创建
实现代码:
#import "ICSandboxHelper.h"
@implementation ICSandboxHelper
+ (NSString *)homePath{
return NSHomeDirectory();
}
+ (NSString *)appPath
{
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSApplicationDirectory, NSUserDomainMask, YES);
return [paths objectAtIndex:0];
}
+ (NSString *)docPath
{
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
return [paths objectAtIndex:0];
}
+ (NSString *)libPrefPath
{
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
return [[paths objectAtIndex:0] stringByAppendingFormat:@"/Preference"];
}
+ (NSString *)libCachePath
{
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
return [[paths objectAtIndex:0] stringByAppendingFormat:@"/Caches"];
}
+ (NSString *)tmpPath
{return [NSHomeDirectory() stringByAppendingFormat:@"/tmp"];
}
+ (BOOL)hasLive:(NSString *)path
{
if ( NO == [[NSFileManager defaultManager] fileExistsAtPath:path] )
{
return [[NSFileManager defaultManager] createDirectoryAtPath:path
withIntermediateDirectories:YES
attributes:nil
error:NULL];
}
return NO;
}