Question

我收到错误但是我不确定为什么我会收到错误。它想要一个'（'在其他之前。

以下是整个事情。

#import "TweetCell.h"
#import "AppDelegate.h"

@implementation TweetCell

@synthesize tweetLabel = _tweetLabel;

@synthesize userImage = _userImage;

@synthesize usernameLabel = _usernameLabel;

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"ContentCell";

    TweetCell *cell = [tableView dequeueReusableCellWithIdentifier:indexPath];

    NSDictionary *currentTweet = [self.tweetsArray objectAtIndex:indexPath.row];

    NSDictionary *currentUser = [currentTweet objectForKey:@"user"];

    cell.usernameLabel.text = [currentTweet objectForKey:@"name"];

    cell.tweetLabel.text = [currentTweet objectForKey:@"text"];
    cell.userImage.image = [UIImage imageNamed:@"image.png"];

    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];

    NSString *userName = cell.usernameLabel.text;

    if ([appDelegate.profileImages objectForKey:userName]) {
        cell.userImage.image = [appDelegate.profileImages objectForKey:userName];
    }

}


else {

        dispatch_queue_t conccurentQueue = dispatch_get_global_queue(dispatch_get_global_queue, 0);
    dispatch_async(conccurentQueue, ^{
        NSURL *imageURL = [NSURL URLWithString:[currentUser objectForKey:@"image.png"]];

        __block NSData *imageData;

        dispatch_sync(conccurentQueue, ^{

            imageData = [NSData dataWithContentsOfURL:imageURL];

            [AppDelegate.profileImages setObject:[UIImage imageWithData:imageData] forKey:userName];

        });

    });
}

Answer 1

将括号前面的括号移到方法的末尾

Answer 2

将您的其他人和支架位置更改为以下内容：

if ([appDelegate.profileImages objectForKey:userName]) {
    cell.userImage.image = [appDelegate.profileImages objectForKey:userName];
} else {
    dispatch_queue_t conccurentQueue = dispatch_get_global_queue(dispatch_get_global_queue, 0);
dispatch_async(conccurentQueue, ^{
    NSURL *imageURL = [NSURL URLWithString:[currentUser objectForKey:@"image.png"]];

    __block NSData *imageData;

    dispatch_sync(conccurentQueue, ^{

        imageData = [NSData dataWithContentsOfURL:imageURL];

        [AppDelegate.profileImages setObject:[UIImage imageWithData:imageData] forKey:userName];

    });

    });
}

Xcode 5 Ghost错误

2 个答案: