iphone开发笔记
1.uiimage图片拉伸
- (void)stretchBackgroundImage { //UIImage *originalImage = [[self backgroundImageForState:UIControlStateNormal] copy]; UIImage *originalImage = [UIImage imageNamed:@"sure_publish_green.png"]; //UIEdgeInsets insets = UIEdgeInsetsMake(2, 10, 2, 10); //UIImage *stretchableImage = [originalImage resizableImageWithCapInsets:insets]; UIImage *stretchableImage = [originalImage stretchableImageWithLeftCapWidth:15 topCapHeight:12]; [self setBackgroundImage:stretchableImage forState:UIControlStateNormal]; }
2.willmovetosupreview
http://iloss.me/blog/2013/05/28/ios6-willmovetosuperview/
3.size to fit 快捷键 cmd + =
4.nsstring to nsdate
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init]; [dateFormatter setDateFormat:@"yyyy-MM-dd"]; NSDate *date = [dateFormatter dateFromString:publicationDate ]; [dateFormatter release];
5.reloaddata scrollto
- (void)tableView:(UITableView *)theTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [theTableView deselectRowAtIndexPath:indexPath animated:NO]; if (itemType == ItemTypeMore) //更多选项 { [theTableView reloadData]; [theTableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES]; } }
6.uiview animation
[UIView animateWithDuration:0.3 animations:^{ edit.frame = editFrame; }];
7./BaiduMobStat/lib/Release$(EFFECTIVE_PLATFORM_NAME)
EFFECTIVE_PLATFORM_NAME 识别真机iphoneos 模拟器 iphonesimulator
Release-iphoneos
Release-iphonesimulator
8.objective-c语法糖 http://blog.devtang.com/blog/2012/08/05/use-modern-objective-c/
9.ARC和非ARC混编
在非ARC环境下，如果想对某个文件单独进行ARC处理，则在Build Parses里的.m文件后加-fobjc-arc，反之则加-fno-objc-arc
10.图片压缩http://www.open-open.com/lib/view/open1375933073921.html
11.cell取消选中状态[tableView deselectRowAtIndexPath:indexPath animated:YES];
12.cell不能选中cell.selectionStyle = UITableViewCellSelectionStyleNone 创建cell的时候设置这个
13.圆角设置
m_mainImgView.layer.cornerRadius = 6;
m_mainImgView.layer.masksToBounds = YES;
14.demo学习http://www.ioslearner.com/uiappearance-proxy-protocol-tutorial/
15.navigationBar add searchBar
To put searchBar into the center of navigationBar:
self.navigationItem.titleView = self.searchBarTop;
-------
To put searchBar to the left/right side of navigationBar:
UIBarButtonItem *searchBarItem = [[UIBarButtonItem alloc] initWithCustomView:searchBar];
self.navigationItem.rightBarButtonItem = searchBarItem;
16.((UILabel*)[[testAlert subviews] objectAtIndex:1]).textAlignment =UITextAlignmentLeft; UIAlertView 居中
17.http://webfrogs.me/2013/04/22/build-cocoapods-project/ CocoaPods 第三方类库管理学习
18.mutiple line text of uilabel http://stackoverflow.com/questions/990221/multiple-lines-of-text-in-uilabel
found a solution.
One just has to add the following code:
textLabel.lineBreakMode =NSLineBreakByWordWrapping;
textLabel.numberOfLines =0;Restored old answer (for reference and devs willing to support iOS below 6.0):
textLabel.lineBreakMode =UILineBreakModeWordWrap;
textLabel.numberOfLines =0;
19.label 关键字标记成红色
NSString *text = @"其实没什么"; NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:text]; [attributeString setAttributes:@{NSForegroundColorAttributeName : [UIColor redColor], NSFontAttributeName : [UIFont systemFontOfSize:17]} range:NSMakeRange(2, 1)]; myLabel.attributedText = attributeString;
20.UIButton上image和title的位置调整方法：
//UIEdgeInsetsMake(top left bottom right) [button setImageEdgeInsets:UIEdgeInsetsMake(0.0, 100.0, 0.0, 0.0)]; //将image的位置向右移动100个像素 [button setTitleEdgeInsets:UIEdgeInsetsMake(0.0 , 100.0, 0.0 , 0.0)]; ////将title的位置向右移动100个像素 //UIEdgeInsetsMake原型 UIKIT_STATIC_INLINE UIEdgeInsets UIEdgeInsetsMake(CGFloat top, CGFloat left, CGFloat bottom, CGFloat right) { UIEdgeInsets insets = {top, left, bottom, right}; return insets; }
21.http://www.cocoachina.com/applenews/devnews/2013/0827/6876.html
22.转义% %%
23.隐藏系统状态栏 让app启动时图片全屏 进入程序后显示状态栏方法。
1)在<APP>-info.list文件中，加上“Status bar is initially hidden”选项，选择yes
2)在程序里面添加 [[UIApplication sharedApplication]setStatusBarHidden:NO withAnimation:UIStatusBarAnimationNone];
即可
24.CGFloat fontHeight = [@"string" sizeWithFont:[UIFont fontWithName:@"HelveticaNeue" size:15.0f]].height; 取字体高度
25.xcode正则替换
@synthesize\s(\w+)
copy.\1 = [\1 copyWithZone:zone]
26.label多行left-top对齐
CGRect frame = cell.contentLabel.frame; cell.contentLabel.frame = CGRectMake(frame.origin.x, frame.origin.y, frame.size.width, 120); cell.contentLabel.lineBreakMode = NSLineBreakByWordWrapping; cell.contentLabel.numberOfLines = 0; cell.contentLabel.text = @"李先生李先生李先生李先生李先生李先生李先生李先生"; [cell.contentLabelsizeToFit];
27.通过UITableViewCell获得cell在table中信息
UITableView* table = (UITableView *)[cell superview]; NSIndexPath* pathOfTheCell = [table indexPathForCell:cell]; NSInteger sectionOfTheCell = [pathOfTheCell section]; NSInteger rowOfTheCell = [pathOfTheCell row];
28.顺序动画执行
[UIView animateWithDuration:0.7 //速度0.7秒
animations:^{//修改rView坐标
//animate 1
}
completion:^(BOOL finished){
[UIView animateWithDuration:0.7 //速度0.7秒
animations:^{//修改rView坐标
//animate 2
}
completion:^(BOOL finished){
}];
}];
29.让UIButton中图片位置偏移
[myButton setImage: [UIImage imageNamed:@"settingImage.png"] forState:UIControlStateNormal];
[myButton setImageEdgeInsets:UIEdgeInsetsMake(0.0, 100.0, 0.0, 0.0)]; //将image的位置向右移动100个像素
30.格式化输出时间
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:kCFDateFormatterShortStyle];
[formatter setTimeStyle:kCFDateFormatterShortStyle];
formatter.dateFormat = @"HH:mm a";
NSLog(@"date : %@", [formatter stringFromDate:date]);
30.点击UIButton缩小动画
// Scale up on button press
- (void) buttonPress:(UIButton*)button {
button.transform = CGAffineTransformMakeScale(1.1, 1.1);
// Do something else
}
// Scale down on button release
- (void) buttonRelease:(UIButton*)button {
button.transform = CGAffineTransformMakeScale(1.0, 1.0);
// Do something else
}
[btn addTarget:self action:@selector(buttonPress:) forControlEvents:UIControlEventTouchDown];
[btn addTarget:self action:@selector(buttonRelease:) forControlEvents:UIControlEventTouchUpInside];
[btn addTarget:self action:@selector(buttonRelease:) forControlEvents:UIControlEventTouchUpOutside];
[btn addTarget:self action:@selector(buttonRelease:) forControlEvents:UIControlEventTouchCancel];
[btn addTarget:self action:@selector(buttonRelease:) forControlEvents:UIControlEventTouchDragExit];
31.删除tableviewcell时，应该先删除数据源里的数据后，再用deleteRowsAtIndexPaths删除tableview的行
for (int i = 0; i < count; i++) { IHaveSeenCarInfoItem *deleteObject = [deleteObjectArray objectAtIndex:i]; int deleteDbId = deleteObject.carInfo.dbId; CarDetailInfoDao *carDao = [CarDetailInfoDao sharedCarDetailInfoDao]; if (curSelectFilter_ == IHaveSeenFilterTypeCollect) { [carDao deleteCollectRecord:deleteDbId]; } else if (curSelectFilter_ == IHaveSeenFilterTypeContactRecord) { [carDao deleteContactRecord:deleteDbId]; } else if (curSelectFilter_ == IHaveSeenFilterTypeBrowseRecord) { [carDao deleteBrowseRecord:deleteDbId]; } [carInfoArray removeObject:deleteObject]; } [self.carInfoTableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
32.图片压缩
NSData *imageData = UIImageJPEGRepresentation(image, 0.5);//压缩比例
33.前50条记录
- (NSMutableArray *)getRecordArray:(CarDetailInfoType)type { NSMutableArray *recordArray = [[NSMutableArray alloc] init]; NSString *tableName = tableNameArray_[type]; FMDatabase *db = [DBUtils openDB]; NSString *sql = [[NSString alloc] initWithFormat:@"SELECT * FROM %@ ORDER BY db_id DESC LIMIT 50", tableName]; FMResultSet *rs = [db executeQuery:sql]; while ([rs next]) { CarDetailInfo *carDetailInfo = [[CarDetailInfo alloc] init]; carDetailInfo.dbId = [rs intForColumn:@"db_id"]; [recordArray addObject:carDetailInfo]; } return recordArray; }
34.~/Library/MobileDevice/Provisioning Profiles xcode5证书目录
