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(inti=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:[BMKPointAnnotationclass]]) {
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intselectIndex=[((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;returnnewAnnotationView;
}returnnil;
}- (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)floatlatitude;//经度@property(assign,nonatomic)floatlongitude;//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.toolbarItemsself.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#pragmamark - 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);
}#pragmamark - getters and setters
- (UILabel *)label
{if(_label ==nil) {
_label=[[UILabel alloc] init];
_label.text=@"1234";
_label.font= [UIFont systemFontOfSize:12];
... ...
}returnlabel;
}
@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)intintstate;
@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intvalue =arc4random_uniform(x ＋1);
生成随机正整数intvalue =arc4random()
通过arc4random() 获取0到x-1之间的整数的代码如下：intvalue = arc4random() %x;
获取1到x之间的整数的代码如下:intvalue = (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：#defineARC4RANDOM_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：doubleval = 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:paramsandBlock:^(id data, NSError *error) {if(!error&&data) {
BackgroundImageBean*groundImagebean =(BackgroundImageBean *)data;intdataNum=groundImagebean.data.count;if(groundImagebean.data&&dataNum>0) {intr=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/applicationSupport/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 -booltrue(2)隐藏Mac隐藏文件的命令：defaults write com.apple.finder AppleShowAllFiles -boolfalse(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{returnNSHomeDirectory();
}+ (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];
}returnNO;
}