存储单元从桌面开关打开

Question

我想要的是使用属性形成一个现有的CNContact对象的子接触。 我从CNContactPickerViewController得到CNContact对象，并在tableview中显示所有属性。

tableviewcell嵌入了开关。我在导航项上有一个预览按钮，当按下按钮时，如果属性中的开关处于打开状态，则此属性应存储在新的CNMutableContact中。

我的问题是：如果联系人有太多的属性，我无法获得存储的屏幕外属性。有没有办法解决这个问题。代码

部分获得子接触：

+(CNMutableContact*)newContactWithSelectedFieldInTableView:(UITableView*)tableView FromContact:(CNContact*)contact 

{ CNMutableContact* aContact = [[CNMutableContact alloc]init];

//get all indexPath from tableview 
NSMutableArray* indexPathArr = [[NSMutableArray alloc]init]; 
NSInteger nSections = [tableView numberOfSections]; 
for (int j=0; j<nSections; j++) { 
    NSInteger nRows = [tableView numberOfRowsInSection:j]; 
    for (int i=0; i<nRows; i++) { 
     NSIndexPath *indexPath = [NSIndexPath indexPathForRow:i inSection:j]; 
     [indexPathArr addObject:indexPath]; 
    } 
} 
//selected phone numbers 
//go through indexPath 
for (NSIndexPath* path in indexPathArr) 
{ 
    UITableViewCell* nameCell = [tableView cellForRowAtIndexPath:path]; 
    UISwitch *mySwitch = (UISwitch *)nameCell.accessoryView; 
    switch (path.section) 
    { 
     case basicInfoSection://basic info section (name,company,department,title) 
     { 
      int row = 0; 
      if(path.row==row) 
      { 
       if(mySwitch.on) 
       { 
        aContact.givenName = contact.givenName; 
        aContact.middleName = contact.middleName; 
        aContact.familyName = contact.familyName; 
       } 
      } 
      if(![contact.organizationName isEqualToString:@""]) 
      {row += 1; 
       if(path.row==row)//company row 
       { 
        //store company 
        if(mySwitch.on) 
         aContact.organizationName = contact.organizationName; 
       } 
      } 
      if(![contact.departmentName isEqualToString:@""]) 
      {row += 1; 
       if(path.row==row)//department row 
       { 
        //store department 
        if(mySwitch.on) 
         aContact.departmentName = contact.departmentName; 
       } 
      } 
      if(![contact.jobTitle isEqualToString:@""]) 
      {row += 1; 
       if(path.row==row)//jobTitle row 
       { 
        //store job Title 
        if(mySwitch.on) 
         aContact.jobTitle = contact.jobTitle; 
       } 
      } 
     } 
      break; 
     case phoneSection: 
     { 
      if(mySwitch.on) 
      { 
       aContact.phoneNumbers = [aContact.phoneNumbers arrayByAddingObject:contact.phoneNumbers[path.row]]; 
      } 
     } 
      break; 

我想出了一个解决方案，现在它做工精细，一些代码列如下：

1＃创建UISwitch的子类

#import <UIKit/UIKit.h> 
@interface SwitchWithIndex : UISwitch 
@property (strong ,nonatomic) NSIndexPath* indexPath; 
@end 

2＃创建的字典，与开关状态和在观看记录indexPath没有负载，用于根据所述需求的tableview布局所有可能indexPath循环数据源（在CNContact）。

for(NSInteger section=0; section<7; section++) 
{ 
    switch (section) { 
     { 
      //section 1 basic info(name, company, department, job title) 
     case basicInfoSection: 
      {int row =0; 
       NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:section]; 
       [_switchStateAtIndex setObject:boolNumber forKey:indexPath]; 

       if(![_contact.organizationName isEqualToString:@""]) 
       {row += 1; 
        NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:section]; 
        [_switchStateAtIndex setObject:boolNumber forKey:indexPath]; 
       } 
       if(![_contact.departmentName isEqualToString:@""]) 
       {row += 1; 
        NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:section]; 
        [_switchStateAtIndex setObject:boolNumber forKey:indexPath]; 
       } 
       if(![_contact.jobTitle isEqualToString:@""]) 
       {row += 1; 
        NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:section]; 
        [_switchStateAtIndex setObject:boolNumber forKey:indexPath]; 
       } 
      } 
      break; 

      //section 2 phones 
     case phoneSection: 
      { 
       for(NSInteger row=0; row<[_contact.phoneNumbers count];row++) 
       { 
        NSIndexPath* indexPath = [NSIndexPath indexPathForRow:row inSection:section]; 
        [_switchStateAtIndex setObject:boolNumber forKey:indexPath]; 
       } 
      } 
      break; 
//more code .. 

3＃在表视图数据源代表加载开关的状态在indexpath和

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"]; 
SwitchWithIndex* mySwitch = [[SwitchWithIndex alloc] init]; 
[mySwitch addTarget:self action:@selector(switchChanged:) forControlEvents:UIControlEventValueChanged]; 
NSNumber* switchStateNumber =[_switchStateAtIndex objectForKey:indexPath]; 
BOOL switchState = [switchStateNumber boolValue]; 
mySwitch.on = switchState; 
mySwitch.indexPath = [[NSIndexPath alloc]init]; 
mySwitch.indexPath = indexPath; 
cell.accessoryView = mySwitch; 
//more code 

和下面的代码来检测开关状态改变。

- (void) switchChanged:(id)sender { 

SwitchWithIndex* mySwitch = sender; 

NSIndexPath* indexPath = mySwitch.indexPath; 

NSLog(@"%@",indexPath); 

NSNumber* switchStateBool = [NSNumber numberWithBool:mySwitch.on ? YES : NO]; 

[_switchStateAtIndex setObject:switchStateBool forKey:indexPath]; 

NSLog(@"The switch is %@", mySwitch.on ? @"ON" : @"OFF"); 

} 

4＃，基于开关状态好不容易攒选定字段

+(CNMutableContact*)newContactFrom:(CNContact*)contact withSwitchState:(NSMutableDictionary*)switchState 
{ 
    CNMutableContact* aContact = [[CNMutableContact alloc]init]; 

for (NSIndexPath* indexPath in switchState.keyEnumerator) 
{ 
    NSNumber* boolNumber = [switchState objectForKey:indexPath]; 
    BOOL switchOn = [boolNumber boolValue]; 
    switch (indexPath.section) { 
     case basicInfoSection://basic info section (name,company,department,title) 
     { 
      int row = 0; 
      if(indexPath.row==row) 
      { 
       if(switchOn) 
       { 
        aContact.givenName = contact.givenName; 
        aContact.middleName = contact.middleName; 
        aContact.familyName = contact.familyName; 
       } 
      } 
      if(![contact.organizationName isEqualToString:@""]) 
      {row += 1; 
       if(indexPath.row==row)//company row 
       { 
        //store company 
        if(switchOn) 
         aContact.organizationName = contact.organizationName; 
       } 
      } 
//more code 

可能有其他的解决方案来解决这个问题，以上就是我可以现在就做。

Answer 1

与其枚举表格视图中的所有单元格，不如在表格视图的单元格中存储开关的状态。我会想象这已经完成了，否则，仅仅通过滚动表视图，开关的状态将不可靠/一致。

例如，在您的cellForRowAtIndexPath:方法中，您必须告诉小区，交换机是否应显示为on或off。您可以通过将交换机的状态保存在实例级别的数组中来完成此操作。这是一种方法：

@interface YourClass() 
{ 
    // Create an instance-level array to store switch values. 
    NSMutableArray *switchValues; 
} 

... 

- (void)viewDidLoad { 
    switchValues = [NSMutableArray new]; 
    for(int i = 0; i < YOUR_TABLE_SIZE; i++) 
     [switchValues insertObject:[NSNumber numberWithBool:DEFAULT_SWITCH_STATE]]; 

    // Alternatively, populate your array with another data object if all the 
    // switches do not have the same default starting state (on/off). 
} 

... 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 
    YourCustomCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CellIdentifier" forIndexPath:indexPath]; 

    ... 

    // Add a target to the switch so we know when it toggles. 
    [cell.toggleSwitch addTarget:self action:@selector(switchSwitched:) forControlEvents:UIControlEventValueChanged]; 
    cell.toggleSwitch.tag = indexPath.row; 
    // Set the state to the appropriate value. 
    cell.toggleSwitch.on = [[switchValues objectAtIndex:indexPath.row] boolValue]; 

    return cell; 
} 

- (void)switchSwitched:(UISwitch *)switcher 
{ 
    // Toggle the switch's value in the instance array 
    [switchValues replaceObjectAtIndex:switcher.tag withObject:[NSNumber numberWithBool:switcher.on]]; 
}