Add an index to the table view of IOS development, and create a View index for ios development

Add an index to the table view of IOS development, and create a View index for ios development

The effect we want to achieve is as follows.

# Import <UIKit/UIKit. h>

@ Interface IkrboyViewController5: UIViewController {

NSMutableDictionary * dict;

}

@ End

#import <UIKit/UIKit.h>@interface IkrboyViewController5 : UIViewController{    NSMutableDictionary *dict;}@end

2. Add the following changes in ControlView. m:

Cpp Code

-(Void) viewDidLoad

{

[Super viewDidLoad];

[Self initTableViewData];

// Do any additional setup after loading the view.

}

-(Void) initTableViewData {

NSBundle * bundle = [NSBundle mainBundle];

NSString * plistPath = [bundle pathForResource: @ "user_head" ofType: @ "plist"];

NSArray * dataArr = [[NSArray alloc] initWithContentsOfFile: plistPath];

// Divide all data into three groups

NSMutableArray * arr1 = [NSMutableArray array];

NSMutableArray * arr2 = [NSMutableArray array];

NSMutableArray * arr3 = [NSMutableArray array];

Dict = [NSMutableDictionary dictionary];

[Dict setObject: arr1 forKey: @ "Group1"];

[Dict setObject: arr2 forKey: @ "Group2"];

[Dict setObject: arr3 forKey: @ "Group3"];

// Set the basis for data division, that is, the data is divided into three groups based on the index, the first group is the index 0-1, the second group is 2-4, and the fifth group is the third group.

For (NSInteger index = 0; index <[dataArr count]; index ++ ){

NSDictionary * item = [dataArr objectAtIndex: index];

If (index <2 ){

[Arr1 addObject: item];

}

Else if (index> = 2 & index <5 ){

[Arr2 addObject: item];

}

Else if (index> = 5 ){

[Arr3 addObject: item];

}

}

}

-(Void) viewDidLoad {[super viewDidLoad]; [self initTableViewData]; // Do any additional setup after loading the view .} -(void) initTableViewData {NSBundle * bundle = [NSBundle mainBundle]; NSString * plistPath = [bundle pathForResource: @ "user_head" ofType: @ "plist"]; NSArray * dataArr = [[NSArray alloc] routing: plistPath]; // divide all data into three groups of partitions * arr1 = [NSMutableArray array]; NSMutableArray * arr2 = [NSMutableArray array]; NSMutableArray * arr3 = [NSMutableArray array]; dict = [NSMutableDictionary dictionary]; [dict setObject: arr1 forKey: @ "Group1"]; [dict setObject: arr2 forKey: @ "Group2"]; [dict setObject: arr3 forKey: @ "Group3"]; // you can specify the basis for Data Division by index, if the index is 0-1, the first group is displayed. If the index is 2-4, the second group is displayed. If the index is 5, the third group is for (NSInteger index = 0; index <[dataArr count]; index ++) {NSDictionary * item = [dataArr objectAtIndex: index]; if (index <2) {[arr1 addObject: item];} else if (index> = 2 & index <5) {[arr2 addObject: item];} else if (index >=5) {[arr3 addObject: item] ;}}

3. initialize TableView

Cpp Code

// Number of groups

-(NSInteger) numberOfSectionsInTableView :( UITableView *) tableView

{

Return [[dict allKeys] count];

}

// Number of data units for each group

-(NSInteger) tableView :( UITableView *) tableView numberOfRowsInSection :( NSInteger) section

{

Switch (section)

{

Case 0:

{

Return [[dict objectForKey: @ "Group1"] count];

}

Case 1:

{

Return [[dict objectForKey: @ "Group2"] count];

}

Case 2:

{

Return [[dict objectForKey: @ "Group3"] count];

}

}

Return 0;

}

// The group title. The following method is not implemented and the group title is not displayed.

-(NSString *) tableView :( UITableView *) tableView titleForHeaderInSection :( NSInteger) section

{

// The keys arr retrieved by dict allKeys are unordered and need to be sorted.

NSArray * arr = [[dict allKeys] sortedArrayUsingSelector: @ selector (compare :)];

Return [arr objectAtIndex: section];

}

// Index prompt on the right of the list. The following method is not implemented and the right index is not displayed.

-(NSArray *) sectionIndexTitlesForTableView: (UITableView *) tableView

{

// The keys arr retrieved by dict allKeys are unordered and need to be sorted.

NSArray * arr = [[dict allKeys] sortedArrayUsingSelector: @ selector (compare :)];

Return arr;

}

-(UITableViewCell *) tableView :( UITableView *) tableView cellForRowAtIndexPath :( NSIndexPath *) indexPath

{

Static NSString * CellIdentifier = @ "myTableCell ";

UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier: CellIdentifier];

NSUInteger row = [indexPath row];

NSUInteger section = [indexPath section];

NSArray * arr;

Switch (section ){

Case 0:

Arr = [dict objectForKey: @ "Group1"];

Break;

Case 1:

Arr = [dict objectForKey: @ "Group2"];

Break;

Case 2:

Arr = [dict objectForKey: @ "Group3"];

Break;

Default:

Break;

}

NSDictionary * rowDict = [arr objectAtIndex: row];

Cell. textLabel. text = [rowDict objectForKey: @ "itemName"];

NSLog (@ "cell. label. text = % @", [rowDict objectForKey: @ "itemName"]);

NSString * imagePath = [rowDict objectForKey: @ "itemImagePath"];

Cell. imageView. image = [UIImage imageNamed: imagePath];

NSLog (@ "cell. image. image = % @", imagePath );

Cell. accessoryType = UITableViewCellAccessoryDisclosureIndicator;

Return cell;

}

// Select the Cell to respond to the event

-(Void) tableView :( UITableView *) tableView didSelectRowAtIndexPath :( NSIndexPath *) indexPath {

[TableView deselectRowAtIndexPath: indexPath animated: YES]; // The selected reversed color disappears immediately.

NSUInteger row = [indexPath row];

NSUInteger section = [indexPath section];

NSArray * arr;

Switch (section ){

Case 0:

Arr = [dict objectForKey: @ "Group1"];

Break;

Case 1:

Arr = [dict objectForKey: @ "Group2"];

Break;

Case 2:

Arr = [dict objectForKey: @ "Group3"];

Break;

Default:

Break;

}

NSDictionary * rowDict = [arr objectAtIndex: row];

NSString * userName = [rowDict objectForKey: @ "itemName"];

NSLog (@ "userName = % @", userName );

}

// Number of groups-(NSInteger) numberOfSectionsInTableView :( UITableView *) tableView {return [[dict allKeys] count];} // number of data units in each group-(NSInteger) tableView :( UITableView *) tableView numberOfRowsInSection :( NSInteger) section {switch (section) {case 0: {return [[dict objectForKey: @ "Group1"] count];} case 1: {return [[dict objectForKey: @ "Group2"] count];} case 2: {return [[dict objectForKey: @ "Group3"] count] ;}} return 0 ;} // The group title. The following method is not implemented, and the group title is not displayed-(NSString *) tableView :( UITableView *) tableView titleForHeaderInSection :( NSInteger) section {// The key arr retrieved by dict allKeys is unordered and needs to be sorted. NSArray * arr = [[dict allKeys] sortedArrayUsingSelector: @ selector (compare :)]; return [arr objectAtIndex: section];} // index prompt on the right of the list. The following method is not implemented, and the right index-(NSArray *) sectionIndexTitlesForTableView: (UITableView *) is not displayed *) tableView {// The key arr retrieved by dict allKeys is unordered and needs to be sorted. NSArray * arr = [[dict allKeys] sortedArrayUsingSelector: @ selector (compare :)]; return arr ;} -(UITableViewCell *) tableView :( UITableView *) tableView cellForRowAtIndexPath :( NSIndexPath *) indexPath {static NSString * CellIdentifier = @ "myTableCell"; UITableViewCell * cell = [tableView progress: progress]; NSUInteger row = [indexPath row]; NSUInteger section = [indexPath section]; NSArray * arr; switch (section) {case 0: arr = [dict objectForKey: @ "Group1"]; break; case 1: arr = [dict objectForKey: @ "Group2"]; break; case 2: arr = [dict objectForKey: @ "Group3"]; break; default: break;} NSDictionary * rowDict = [arr objectAtIndex: row]; cell. textLabel. text = [rowDict objectForKey: @ "itemName"]; NSLog (@ "cell. label. text = % @ ", [rowDict objectForKey: @" itemName "]); NSString * imagePath = [rowDict objectForKey: @" itemImagePath "]; cell. imageView. image = [UIImage imageNamed: imagePath]; NSLog (@ "cell. image. image = % @ ", imagePath); cell. accessoryType = response; return cell;} // select the Cell response event-(void) tableView :( UITableView *) tableView didSelectRowAtIndexPath :( NSIndexPath *) indexPath {[tableView deselectRowAtIndexPath: indexPath animated: YES]; // The reversed color after selection instantly disappears NSUInteger row = [indexPath row]; NSUInteger section = [indexPath section]; NSArray * arr; switch (section) {case 0: arr = [dict objectForKey: @ "Group1"]; break; case 1: arr = [dict objectForKey: @ "Group2"]; break; case 2: arr = [dict objectForKey: @ "Group3"]; break; default: break;} NSDictionary * rowDict = [arr objectAtIndex: row]; NSString * userName = [rowDict objectForKey: @ "itemName"]; NSLog (@ "userName = % @", userName );}

 

 

• UITableView.zip (22.2 KB)

View switching in iOS development

There are two methods
1. Set the person who is window. rootViewcontroller as needed. Listen for notifications, log on and exit in appdelegate. h. When the window. rootViewcontroller is loaded by default, it is set as the logon viewcontroller. When the login succeeds, send a notification and receive the notification in appdelegate. The window will be modified. rootViewController is uitabbarcontroller. the corresponding exit notification is sent when you exit. In this case, the exit notification is received in appdelegate, and the window. rootViewController is set as the logon viewcontroller.

2. By default, uitabbarController is set to window. rootViewController. When you log on, use presentviewcontroller to bring up the logon viewcontroller. In this way, the first view is the logon view. After successful logon, dismiss logs on to viewcontroller and sends a notification to reload tabbarcontroller again. Exit and re-Press the logon window.

My suggestion is to use the second method. This method can be used to handle apps that do not need to log on or view some content. When you need to log on, press it to log on to the logon view.

In ios development, how to ignore the top view and directly operate the bottom view

BView is set to transparent. If. alpha is used, aView cannot be operated directly. The touch event will only respond to the top page.
You can either remove bView or set bView. hidden to Yes.