iphone 开发笔记二

11、iPhone中变量值是否等于字符串的判断方法：

Objective-C代码

1. [string1isEqualToString:@"123"];

12、iPhone的Framework的目录：
Mac---Developer---Platforms---<wbr style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; text-decoration:none">iPhoneOS.platform---Developer-<wbr style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; text-decoration:none">--SDKs---iPhoneOS3.1.3.sdk---<wbr style="margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; text-decoration:none">System---Library---Frameworks</wbr></wbr></wbr>

13、在iPhone中设置googlemap的经纬度：

Objective-C代码

1. CLLocationCoordinate2DcenterCoordinate;
2. centerCoordinate.latitude=39.9097;
3. centerCoordinate.longitude=105.3476;
4. MKCoordinateSpanspan;
5. span.latitudeDelta=30;
6. span.longitudeDelta=30;
7. MKCoordinateRegionregion;
8. region.center=centerCoordinate;
9. region.span=span;
10. [mapviewsetRegion:regionanimated:TRUE];

14、翻页过渡效果：

Objective-C代码

1. -(IBAction)backToMenus:(id)sender{
2. CATransition*transition=[CATransitionanimation];
3. transition.duration=0.5;
4. transition.timingFunction=[CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseIn];
5. transition.type=kCATransitionFade;
6. transition.delegate=self;
7. [self.view.superview.layeraddAnimation:transitionforKey:nil];
8. [self.viewremoveFromSuperview];
9. }

15、fathercontroller的写法：

Objective-C代码

1. 在.h中：
2. #import"DataBaseVC.h"
3. @classDataBaseVC;
4. DataBaseVC*databasevc;
5. 在.m中：
6. databasevc=[[DataBaseVCalloc]init];

16、将NSData类型的数据转换成NSString：

Objective-C代码

1. NSString*theXML=[[NSStringalloc]initWithBytes:[webDatamutableBytes]length:[webDatalength]encoding:NSUTF8StringEncoding];//webData为NSData类型

17、将NSString类型的数据转换成NSData：

Objective-C代码

1. NSData*webData=[NSMutableDatadataWithBytes:[theXMLUTF8String]length:[theXMLlength]];;//theXML为NSString类型

18、将特殊字符转义：

Objective-C代码

1. NSString*str2=[str1stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

19、WiFi提示：

Objective-C代码

1. 在p-list中添加如下内容：
2. ApplicationusesWi-FiYES
3. SBUsesNetwork3

20、iPhone获取系统时间：

Objective-C代码

1. NSDateFormatter*formatter=[[NSDateFormatteralloc]init];
2. [formattersetDateFormat:@"YYYYMMddhhmmss"];
3. NSString*locationString=[formatterstringFromDate:[NSDatedate]];