IOS 学习笔记 —— tableView 使用详解（二）

#pragma mark - 异步加载图片
-(void) loadImageForCell:(NSIndexPath *)indexPath andUrl:(NSString *)urlPath{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSURL *url = [NSURL URLWithString:urlPath];

//同步请求
NSData *data = [NSData dataWithContentsOfURL:url];
if (data != nil) {
dispatch_async(dispatch_get_main_queue(), ^{
//MyCell是自己定义的Cell
MyCell *cell = (MyCell *)[self.tableAuction cellForRowAtIndexPath:indexPath];
cell.imageView.image = [[UIImage alloc] initWithData:data];
});
}
});
}