我是iOS开发的新手。对于我的小信使,我需要一个联系人选择器和一个textarea。所以TTMessageController of the Three20 project似乎非常有趣。
但是我不确定如何实现它。现在我有三个控制器,每个视图一个。我希望在第三个视图中有一个联系人选择器和textarea。
我已成功设置了three20。但是我该如何使用它?我可以通过界面构建器或仅通过代码使用它吗?在我的案例中会采取什么方法?
在开始这项工作之前,我想确保这是正确的解决方案。 three20是否允许我决定如何处理来自文本字段的输入?我想用自己的网关发送短信。
答案 0 :(得分:6)
查看three20源附带的TTCatalog示例应用程序的源代码。它有一个调用TTMessageController和处理字段的例子。基本上,您在类中实现TTMessageControllerDelegate,并且一旦按下发送按钮,TTMessageController将从消息中将字段发送给您进行处理。我正在使用这个类作为前端,通过我的应用程序中的第三方网关发送SMS消息。我将它与消息气泡视图相结合,以模仿本机SMS应用程序,它就像一个冠军。
编辑:如果你现在只有一个视图控制器的骨架,你可能最好将MessageTestController克隆到你的应用程序并调整它,而不是试图在你的控制器中重新实现它的一部分。示例应用程序没有做的一件事是将MessageController挂钩到您的地址簿。为此你需要像这样创建一个AddressbookModel和AddressBookModelDataSource:
AddressbookDataSource.h
#import <Three20/Three20.h>
@class AddressBookModel;
@interface AddressBookDataSource : TTSectionedDataSource {
AddressBookModel* _addressBook;
}
@property(nonatomic,readonly) AddressBookModel* addressBook;
@end
AddressbookDataSource.m
#import <AddressBookUI/AddressBookUI.h>
#import "AddressBookDataSource.h"
#import "AddressBookModel.h"
@implementation AddressBookDataSource
@synthesize addressBook = _addressBook;
///////////////////////////////////////////////////////////////////////////////////////////////////
// NSObject
- (id)init {
if (self = [super init]) {
_addressBook = [AddressBookModel new];
self.model = _addressBook;
}
return self;
}
- (void)dealloc {
RELEASE_SAFELY(_addressBook);
RELEASE_SAFELY(self.items);
[super dealloc];
}
///////////////////////////////////////////////////////////////////////////////////////////////////
// TTTableViewDataSource
- (void)tableViewDidLoadModel:(UITableView*)tableView {
RELEASE_SAFELY(self.items);
self.items = [NSMutableArray new];
int countPeople = [((AddressBookModel *)self.model).searchResults count];
for (int i = 0; i < countPeople; i++) {
ABRecordRef person = [((AddressBookModel*)self.model).searchResults objectAtIndex:i];
ABMultiValueRef phoneNumberMultiValueRef = ABRecordCopyValue(person, kABPersonPhoneProperty);
NSArray* phoneNumbers = (NSArray*)ABMultiValueCopyArrayOfAllValues(phoneNumberMultiValueRef);
RELEASE_CF_SAFELY(phoneNumberMultiValueRef);
if ([phoneNumbers count]) {
NSString *personName = (NSString *)ABRecordCopyCompositeName(person);
for (NSString *phoneNumber in phoneNumbers) {
TTTableItem* item = [TTTableSubtitleItem itemWithText:personName subtitle:phoneNumber];
[_items addObject:item];
}
RELEASE_SAFELY(personName);
}
RELEASE_SAFELY(phoneNumbers);
}
}
- (void)search:(NSString*)text {
[_addressBook search:text];
}
- (NSString*)titleForLoading:(BOOL)reloading {
return @"Searching...";
}
- (NSString*)titleForNoData {
return @"No names found";
}
@end
AddressBookModel.h
#import <Three20/Three20.h>
@interface AddressBookModel : NSObject <TTModel> {
NSMutableArray* _delegates;
NSArray* _searchResults;
}
@property(nonatomic,retain) NSArray* searchResults;
- (void)search:(NSString*)text;
@end
AddressBookModel.m
#import "AddressBookModel.h"
#import <AddressBookUI/AddressBookUI.h>
@implementation AddressBookModel
@synthesize searchResults = _searchResults;
- (id)init {
if (self = [super init]) {
_delegates = nil;
_searchResults = nil;
}
return self;
}
- (void)dealloc {
RELEASE_SAFELY(_delegates);
RELEASE_SAFELY(_searchResults);
[super dealloc];
}
///////////////////////////////////////////////////////////////////////////////////////////////////
// TTModel
- (NSMutableArray*)delegates {
if (!_delegates) {
_delegates = TTCreateNonRetainingArray();
}
return _delegates;
}
- (BOOL)isLoadingMore {
return NO;
}
- (BOOL)isOutdated {
return NO;
}
- (BOOL)isLoaded {
return YES;
}
- (BOOL)isLoading {
return NO;
}
- (BOOL)isEmpty {
return !_searchResults.count;
}
- (void)load:(TTURLRequestCachePolicy)cachePolicy more:(BOOL)more {
}
- (void)invalidate:(BOOL)erase {
}
- (void)cancel {
[_delegates perform:@selector(modelDidCancelLoad:) withObject:self];
}
- (void)search:(NSString*)text {
[self cancel];
if (text.length) {
[_delegates perform:@selector(modelDidStartLoad:) withObject:self];
ABAddressBookRef addressBook = ABAddressBookCreate();
CFStringRef searchText = CFStringCreateWithCString(NULL, [text cStringUsingEncoding:NSUTF8StringEncoding], kCFStringEncodingUTF8);
self.searchResults = (NSArray*) ABAddressBookCopyPeopleWithName(addressBook, searchText);
RELEASE_CF_SAFELY(searchText);
[_delegates perform:@selector(modelDidFinishLoad:) withObject:self];
RELEASE_CF_SAFELY(addressBook);
} else {
self.searchResults = nil;
}
[_delegates perform:@selector(modelDidChange:) withObject:self];
}
@end
地址簿的内容是整个练习中最难的部分。其余的很容易。