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3種類のセルを使用してアプリケーションでUITableview（IB付き）を作成します。私のテーブルビューをドラッグするときを除いてすべて正常に動作すべて非常に遅くなります。だから誰かが私のアプリのパフォーマンスを改善するために助けることができるなら、それはクールだ。テーブルビューのためのパフォーマンスの問題を伴うUITableView
マイコード：
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [[myData objectForKey:@"listnews"] count];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0) {
return 154;
}
if (indexPath.row == 1) {
return 34;
}
else return 70;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
[myTextField resignFirstResponder];
ListNewsCell *cCell = (ListNewsCell *)[myTable dequeueReusableCellWithIdentifier:[NSString stringWithFormat:@"cCellIdentifier%d",indexPath.row]];
cCell = [[ListNewsCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:[NSString stringWithFormat:@"cCellIdentifier%d",indexPath.row]];
if (indexPath.row == 0) {
NSString * caroline = [[[myData objectForKey:@"listnews"] objectAtIndex:indexPath.row] objectForKey:@"urlimage"];
cCell.c1Image1.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",caroline]]]];
cCell.c1Image2.image = [UIImage imageNamed:@"barreNoireHub.png"];
NSString * sophie = [[[myData objectForKey:@"listnews"] objectAtIndex:indexPath.row] objectForKey:@"titre"];
NSString *itemTitle = sophie ? [sophie stringByConvertingHTMLToPlainText] : @"[No Title]";
cCell.c1Label1.text = itemTitle;
NSString * sonia = [[[myData objectForKey:@"listnews"] objectAtIndex:indexPath.row] objectForKey:@"extrait"];
NSString *itemExtrait = sonia ? [sonia stringByConvertingHTMLToPlainText] : @"[No Title]";
cCell.c1Label2.text = itemExtrait;
}
if (indexPath.row == 1) {
UIImageView * imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 34)];
imageView.backgroundColor = [UIColor whiteColor];
imageView.image = [UIImage imageNamed:@"barreSearchHub.png"];
[cCell addSubview:imageView];
[imageView release];
UIView * insertView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 34)];
myTextField = [[UITextField alloc] initWithFrame:CGRectMake(15, 6, 270, 25)];
myTextField.placeholder = @"Recherche";
myTextField.tag = 1;
myTextField.delegate = self;
myTextField.returnKeyType = UIReturnKeySearch;
[insertView addSubview:myTextField];
cCell.accessoryView = insertView;
}
if (indexPath.row > 1) {
cCell.c2Image1.image = [UIImage imageNamed:@"cellM.png"];
NSString * caroline = [[[myData objectForKey:@"listnews"] objectAtIndex:indexPath.row] objectForKey:@"urlimage"];
cCell.c2Image2.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",caroline]]]];
NSString * sophie = [[[myData objectForKey:@"listnews"] objectAtIndex:indexPath.row] objectForKey:@"titre"];
NSString *itemTitle = sophie ? [sophie stringByConvertingHTMLToPlainText] : @"[No Title]";
cCell.c2Label1.text = itemTitle;
NSString * sonia = [[[myData objectForKey:@"listnews"] objectAtIndex:indexPath.row] objectForKey:@"extrait"];
NSString *itemExtrait = sonia ? [sonia stringByConvertingHTMLToPlainText] : @"[No Title]";
cCell.c2Label2.text = itemExtrait;
}
return cCell;
}
のUITableViewCellのコード：すべての
#import "ListNewsCell.h"
@implementation ListNewsCell
@synthesize c1Image1, c1Image2, c1Label1, c1Label2;
@synthesize c2Image1, c2Image2, c2Label1, c2Label2;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
c1Image1 = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,320,154)];
c1Image1.backgroundColor = [UIColor clearColor];
[self addSubview:c1Image1];
[c1Image1 release];
c1Image2 = [[UIImageView alloc] initWithFrame:CGRectMake(0,98,320,56)];
c1Image2.backgroundColor = [UIColor clearColor];
[self addSubview:c1Image2];
[c1Image2 release];
c1Label1 = [[UILabel alloc] initWithFrame:CGRectMake(5, 100, 310, 20)];
c1Label1.font = [UIFont fontWithName:@"Arial-BoldMT" size:14];
c1Label1.textColor = [UIColor whiteColor];
c1Label1.backgroundColor = [UIColor clearColor];
[self addSubview:c1Label1];
c1Label2 = [[UILabel alloc] initWithFrame:CGRectMake(5, 112, 310, 45)];
c1Label2.font = [UIFont fontWithName:@"Arial" size:12];
c1Label2.textColor = [UIColor whiteColor];
c1Label2.numberOfLines = 2;
c1Label2.backgroundColor = [UIColor clearColor];
[self addSubview:c1Label2];
c2Image1 = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,320,70)];
c2Image1.backgroundColor = [UIColor clearColor];
[self addSubview:c2Image1];
[c2Image1 release];
c2Label1 = [[UILabel alloc] initWithFrame:CGRectMake(105, 8, 180, 20)];
c2Label1.font = [UIFont fontWithName:@"Arial-BoldMT" size:14];
c2Label1.textColor = [UIColor blackColor];
c2Label1.backgroundColor = [UIColor clearColor];
[self addSubview:c2Label1];
c2Label2 = [[UILabel alloc] initWithFrame:CGRectMake(105, 25, 180, 45)];
c2Label2.font = [UIFont fontWithName:@"Arial" size:12];
c2Label2.textColor = [UIColor blackColor];
c2Label2.numberOfLines = 2;
c2Label2.backgroundColor = [UIColor clearColor];
[self addSubview:c2Label2];
c2Image2 = [[UIImageView alloc] initWithFrame:CGRectMake(20,10,75,55)];
c2Image2.backgroundColor = [UIColor clearColor];
[self addSubview:c2Image2];
[c2Image2 release];
}
return self;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
}
- (void)dealloc
{
[super dealloc];
}
@end
ありがとう！
私はテーブルビューをスクロールすると、セル内のすべての画像を再読み込みします。しかし、どうすればこの問題を回避し、画像の「キャッシュ」を維持できますか？ –
あなたの質問への私の答えを更新しました – Wolfert