1毅舆，設置edgesForExtendedLayout＝UIRectEdgeNone時會導致navigationbar和tarbar背景出現(xiàn)一條灰色的背景。解決辦法：設置Translucent屬性。代碼：
self.navigationController.navigationBar.translucent=NO;
self.tabBarController.tabBar.translucent=NO;
2，textfield設置左右圖片
UITextField*textField=[[UITextFieldalloc]init];
UIImageView*imgv=[[UIImageViewalloc]initWithImage:[UIImageimageNamed:@"right.png"]];
textField.rightView=imgv;
textField.rightViewMode=UITextFieldViewModeAlways;
3献宫，
obj轉(zhuǎn)json
NSData* jsonData = [NSJSONSerializationdataWithJSONObject:detailDicoptions:0error:nil];
NSString*?myString?=?[[NSStringalloc]initWithData:jsonDataencoding:NSUTF8StringEncoding];
json轉(zhuǎn)obj
NSDictionary* selectSimpleTest = [NSJSONSerializationJSONObjectWithData:[tizhiSimpleTest.detaildataUsingEncoding:NSUTF8StringEncoding]options:0error:nil];
4，歸檔解檔保存本地數(shù)據(jù)
[NSKeyedArchiver archiveRootObject:obj toFile:filePath]//寫
?[NSKeyedUnarchiver unarchiveObjectWithFile:filePath];//讀
