[英]UITableView - methods are not being called
我有一個子視圖,在其中構建了一個UITableview,已將委托和數據源設置為該子視圖,但由於某種原因,未調用表方法...某人可以查看我的代碼並查看我在做什么嗎? 謝謝
.h文件
@interface TwitterController : UIView <UITableViewDelegate, UITableViewDataSource> {
UIButton* btnCloseView;
UITableView* tblTweets;
UIImageView* imgTwitterIcon;
ColorController* colorManager;
NSMutableArray* tweetsArray;
NSMutableArray* tableData;
NSString* twitterID;
}
@property (nonatomic, retain) NSString* twitterID;
- (NSMutableArray* ) getTweets;
- (void) sendNotification : (id) sender;
@end
.m文件
#import "TwitterController.h"
@implementation TwitterController
@synthesize twitterID;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
colorManager = [ColorController new];
}
return self;
}
/*- (void)drawRect:(CGRect)rect {
}*/
- (void)layoutSubviews {
imgTwitterIcon = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"imgTwitterBird"]];
CGRect twitterIconFrame = [imgTwitterIcon frame];
twitterIconFrame.origin.x = 50.0;
twitterIconFrame.origin.y = 20.0;
tblTweets = [[UITableView alloc] initWithFrame:CGRectMake(50.0, 25.0, 220.0, 500.0)];
tblTweets.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
tblTweets.separatorColor = [colorManager setColor:176.0:196.0:222.0];
tblTweets.layer.borderWidth = 1.0;
tblTweets.rowHeight = 20.0;
tblTweets.scrollEnabled = YES;
tblTweets.delegate = self;
tblTweets.dataSource = self;
tableData = [self getTweets];
UIImage* imgCloseButton = [UIImage imageNamed:@"btnCloseWindow.png"];
CGSize imageSize = imgCloseButton.size;
btnCloseView = [[UIButton alloc] initWithFrame: CGRectMake(220.0, 550.0, imageSize.width, imageSize.height)];
[btnCloseView setImage:[UIImage imageNamed:@"btnCloseWindow.png"] forState:UIControlStateNormal];
[btnCloseView addTarget:self action:@selector(sendNotification:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:tblTweets];
[self addSubview:imgTwitterIcon];
[self addSubview:btnCloseView];
}
- (NSMutableArray*) getTweets {
//array to hold tweets
tweetsArray = [[NSMutableArray alloc] init];
twitterID = @"Pruit_Igoe";
///set up a NSURL to the twitter API
NSURL* twitterAPI = [NSURL URLWithString:[NSString stringWithFormat:@"https://api.twitter.com/1/statuses/user_timeline.json?include_entities=true&include_rts=true&screen_name=%@&count=10", twitterID]];
//get last 10 tweets (max is 20)
TWRequest *twitterRequest = [[TWRequest alloc] initWithURL:twitterAPI
parameters:nil requestMethod:TWRequestMethodGET];
// Notice this is a block, it is the handler to process the response
[twitterRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
if ([urlResponse statusCode] == 200) {
// The response from Twitter is in JSON format
// Move the response into a dictionary and print
NSError *error;
NSDictionary *tweetsDict = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
for(NSDictionary* thisTweetDict in tweetsDict) {
[tweetsArray addObject:[thisTweetDict objectForKey:@"text"]];
}
}
else
NSLog(@"Twitter error, HTTP response: %i", [urlResponse statusCode]);
}];
return tweetsArray;
}
#pragma mark Table Management
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [tableData count];
NSLog(@"%i", [tableData count]); //does not log!
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [tableData count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"tableCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.textColor = [UIColor colorWithRed:66.0/255.0 green:66.0/255.0 blue:66.0/255.0 alpha:1];
cell.textLabel.font = [UIFont fontWithName:@"Helvetica-Bold" size: 13.0];
cell.textLabel.text = [tweetsArray objectAtIndex:indexPath.row];
CGRect cellFrame = [cell frame];
cellFrame.size.height = 25.0;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString* thisTweet = [tableData objectAtIndex:indexPath.row];
}
#pragma mark Close Window
- (void) sendNotification : (id) sender {
NSMutableDictionary* userData = [[NSMutableDictionary alloc] init];
[userData setObject:@"closeTwitter" forKey:@"theEvent"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"theMessenger" object:self userInfo: userData];
}
@end
我認為您不是分配和初始化tableData
。 將其寫入tableData = [[NSMutableArray alloc] init];
在- (id)initWithFrame:(CGRect)frame
方法或- (void)layoutSubviews
方法中。 去嘗試一下。
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
NSLog(@"%i", [tableData count]);
return [tableData count];
//NSLog(@"%i", [tableData count]); //does not log!
}
如果輸出為零,則tableData
數組為空。 檢查它tableData
數組
您應該在initWithFrame:
進行所有初始化(例如tblTweets
)。
layoutSubviews
是布置子視圖的方式。
實際上,如果將所有代碼從fromLayoutSubviews
移到initWithFrame:
fromLayoutSubviews
您的代碼將(應該)工作。 然后,您可以將部分代碼(布局部分)移回。
編輯:當您移動初始化代碼時,您可能還必須添加[tblTweets reloadData];
就在tableData = [self getTweets];
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