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Allow hiding multiple cells #3

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599f917
Allow hiding multiple cells
BandarHL Jul 20, 2022
20c5bfb
update codes in README.md
BandarHL Jul 20, 2022
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92 changes: 52 additions & 40 deletions Dynamic Specifiers/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -80,31 +80,40 @@
5. Add the method `collectDynamicSpecifiersFromArray:` to your RootListController. This method adds the dynamic specifier to the `dynamicSpecifiers` dictionary with the opposing specifier's `id` as the key. Call this method from the `-specifiers` method and `-reloadSpecifiers`:

```objc
-(void)collectDynamicSpecifiersFromArray:(NSArray *)array {
if(!self.dynamicSpecifiers) {
self.dynamicSpecifiers = [NSMutableDictionary new];

} else {
[self.dynamicSpecifiers removeAllObjects];
}

for(PSSpecifier *specifier in array) {
NSString *dynamicSpecifierRule = [specifier propertyForKey:@"dynamicRule"];

if(dynamicSpecifierRule.length > 0) {
NSArray *ruleComponents = [dynamicSpecifierRule componentsSeparatedByString:@", "];

if(ruleComponents.count == 3) {
NSString *opposingSpecifierID = [ruleComponents objectAtIndex:0];
[self.dynamicSpecifiers setObject:specifier forKey:opposingSpecifierID];

} else {
[NSException raise:NSInternalInconsistencyException format:@"dynamicRule key requires three components (Specifier ID, Comparator, Value To Compare To). You have %ld of 3 (%@) for specifier '%@'.", ruleComponents.count, dynamicSpecifierRule, [specifier propertyForKey:PSTitleKey]];
}
- (void)collectDynamicSpecifiersFromArray:(NSArray *)array {
if (!self.dynamicSpecifiers) {
self.dynamicSpecifiers = [NSMutableDictionary new];

} else {
[self.dynamicSpecifiers removeAllObjects];
}
}

self.hasDynamicSpecifiers = (self.dynamicSpecifiers.count > 0);

for (PSSpecifier *specifier in array) {
NSString *dynamicSpecifierRule = [specifier propertyForKey:@"dynamicRule"];

if (dynamicSpecifierRule.length > 0) {
NSArray *ruleComponents = [dynamicSpecifierRule componentsSeparatedByString:@", "];

if (ruleComponents.count == 3) {
NSString *opposingSpecifierID = [ruleComponents objectAtIndex:0];
if ([self.dynamicSpecifiers objectForKey:opposingSpecifierID]) {
NSMutableArray *specifiers = [[self.dynamicSpecifiers objectForKey:opposingSpecifierID] mutableCopy];
[specifiers addObject:specifier];


[self.dynamicSpecifiers removeObjectForKey:opposingSpecifierID];
[self.dynamicSpecifiers setObject:specifiers forKey:opposingSpecifierID];
} else {
[self.dynamicSpecifiers setObject:[NSMutableArray arrayWithArray:@[specifier]] forKey:opposingSpecifierID];
}

} else {
[NSException raise:NSInternalInconsistencyException format:@"dynamicRule key requires three components (Specifier ID, Comparator, Value To Compare To). You have %ld of 3 (%@) for specifier '%@'.", ruleComponents.count, dynamicSpecifierRule, [specifier propertyForKey:PSTitleKey]];
}
}
}

self.hasDynamicSpecifiers = (self.dynamicSpecifiers.count > 0);
}

-(NSArray *)specifiers {
Expand Down Expand Up @@ -145,23 +154,26 @@
7. Next, in the `-tableView:heightForRowAtIndexPath:` delegate method we return zero whenever one of our dynamic specifiers should be hidden:

```objc
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if(self.hasDynamicSpecifiers) {
PSSpecifier *dynamicSpecifier = [self specifierAtIndexPath:indexPath];

if([self.dynamicSpecifiers.allValues containsObject:dynamicSpecifier]) {
BOOL shouldHide = [self shouldHideSpecifier:dynamicSpecifier];

UITableViewCell *specifierCell = [dynamicSpecifier propertyForKey:PSTableCellKey];
specifierCell.clipsToBounds = shouldHide;

if(shouldHide) {
return 0;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if (self.hasDynamicSpecifiers) {
PSSpecifier *dynamicSpecifier = [self specifierAtIndexPath:indexPath];
BOOL __block shouldHide = false;

[self.dynamicSpecifiers enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, id _Nonnull obj, BOOL * _Nonnull stop) {
NSMutableArray *specifiers = obj;
if ([specifiers containsObject:dynamicSpecifier]) {
shouldHide = [self shouldHideSpecifier:dynamicSpecifier];

UITableViewCell *specifierCell = [dynamicSpecifier propertyForKey:PSTableCellKey];
specifierCell.clipsToBounds = shouldHide;
}
}];
if (shouldHide) {
return 0;
}
}
}

return UITableViewAutomaticDimension;

return UITableViewAutomaticDimension;
}
```

Expand Down
8 changes: 4 additions & 4 deletions Dynamic Specifiers/XXXRootListController.h
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@ typedef NS_ENUM(NSInteger, XXDynamicSpecifierOperatorType) {
@interface XXXRootListController : PSListController
@property (nonatomic, assign) BOOL hasDynamicSpecifiers;
@property (nonatomic, retain) NSMutableDictionary *dynamicSpecifiers;
-(void)collectDynamicSpecifiersFromArray:(NSArray *)array;
-(BOOL)shouldHideSpecifier:(PSSpecifier *)specifier;
-(XXDynamicSpecifierOperatorType)operatorTypeForString:(NSString *)string;
@end
- (void)collectDynamicSpecifiersFromArray:(NSArray *)array;
- (BOOL)shouldHideSpecifier:(PSSpecifier *)specifier;
- (XXDynamicSpecifierOperatorType)operatorTypeForString:(NSString *)string;
@end
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