之前做个小移动客户端，图方便快捷，使用了ionic来开发，整体还是挺顺畅的，就是不太习惯yong其中碰到一些小坑，
都是一些知道了就很简单，不知道就很蛋疼的东西，所以做个笔记，帮初次接触ionic和angularjs的人省点事儿
1.ionic中的CORS（跨域）问题
这个问题一般刚接触ionic的都会遇到，在浏览器中通过ionic serve调试的时候，请求api时会报错
XMLHttpRequest cannot load http://localhost:8080/api/p/1. No
'Access-Control-Allow-Origin' header is present on the requested
resource. Origin 'http://localhost:8100' is therefore not allowed
access.
项目里需要实现UITableView的Cell的高度自适应，google后发现都是基于默认cell的处理，对于自定义的UITableViewCell没有效果，稍微研究了一下代码，发现，关键还是在计算UILabel的高度上，于是稍微对网上现成的代码做了写修改，实现了需要的功能。
要实现的效果如下：
自定义的cell也很简单，一排label，简单的表格效果：
简单贴一下关键代码，做为备忘：
1、设置全局变量来保存每行高度，目的是避免重复计算高度
@property (nonatomic, retain) NSMutableArray *cellHeightList;@synthesize cellHeightList;- (void)viewDidLoad{[super viewDidLoad];//初始化self.cellHeightList = [[NSMutableArray alloc] init];}
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2、计算每行cell高度，并保存高度列表
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- (float)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{int row = [indexPath row];//设置字体信息UIFont *textfont15 = [UIFont systemFontOfSize:15];//选取几个可能内容比较多的label值Category *category = (Category *)[self.personList objectAtIndex:indexPath.section];NSDictionary *rowData = [category.list objectAtIndex:row];NSString *pnowContent = [rowData objectForKey:@"ppositionnow"];NSString *pfurContent = [rowData objectForKey:@"ppositionfur"];NSString *pcancelContent = [rowData objectForKey:@"ppositioncancel"];NSString *degreeContent = [rowData objectForKey:@"pdegree"];NSString *infoContent = [rowData objectForKey:@"potherinfo"];// 分别计算显示这些内容的几个label所需要的最小尺寸//169.0f;104.0f;145.0f为label的宽度CGSize pnowsize = [pnowContent sizeWithFont:textfont15 constrainedToSize:CGSizeMake(168.0f, 1000.0f) lineBreakMode:NSLineBreakByWordWrapping];CGSize pfursize = [pfurContent sizeWithFont:textfont15 constrainedToSize:CGSizeMake(168.0f, 1000.0f) lineBreakMode:NSLineBreakByWordWrapping];CGSize pcansize = [pcancelContent sizeWithFont:textfont15 constrainedToSize:CGSizeMake(168.0f, 1000.0f) lineBreakMode:NSLineBreakByWordWrapping];CGSize degsize = [degreeContent sizeWithFont:textfont15 constrainedToSize:CGSizeMake(104.0f, 1000.0f) lineBreakMode:NSLineBreakByWordWrapping];CGSize infosize = [infoContent sizeWithFont:textfont15 constrainedToSize:CGSizeMake(145.0f, 1000.0f) lineBreakMode:NSLineBreakByWordWrapping];//保存不同label高度值NSMutableArray *heightArray = [[NSMutableArray alloc] initWithCapacity:5];[heightArray addObject:[NSNumber numberWithFloat:pnowsize.height]];[heightArray addObject:[NSNumber numberWithFloat:pfursize.height]];[heightArray addObject:[NSNumber numberWithFloat:pcansize.height]];[heightArray addObject:[NSNumber numberWithFloat:degsize.height]];[heightArray addObject:[NSNumber numberWithFloat:infosize.height]];//初始化最大高度值NSNumber *max_height = [NSNumber numberWithInt:50];//比较，找出最大高度做为cell的高度for (int i=0;i<[heightArray count];i++){if ([[heightArray objectAtIndex:i] intValue]>[max_height intValue]) {max_height = [heightArray objectAtIndex:i];}}//保存cell高度到全局变量[self.cellHeightList addObject:[NSNumber numberWithFloat:[max_height floatValue]+30]];return [max_height floatValue]+30.0;}
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3、设置cell内UILabel的高度
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- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{……NSDictionary *rowData = [category.list objectAtIndex:nowrow];NSString *pnameContent = [rowData objectForKey:@"pname"];NSString *pnowContent = [rowData objectForKey:@"ppositionnow"];NSString *pfurContent = [rowData objectForKey:@"ppositionfur"];NSString *pcancelContent = [rowData objectForKey:@"ppositioncancel"];NSString *genderContent = [rowData objectForKey:@"pgender"];NSString *degreeContent = [rowData objectForKey:@"pdegree"];NSString *birthContent = [rowData objectForKey:@"pbirth"];NSString *partyContent = [rowData objectForKey:@"pparty"];NSString *infoContent = [rowData objectForKey:@"potherinfo"];//获取当前cell高度float labelHeight = [[self.cellHeightList objectAtIndex:nowrow] floatValue];//当前label信息CGRect pnameFrame = cell.PersonNameLabel.frame;CGRect pnowFrame = cell.PositionNowLabel.frame;CGRect pfurFrame = cell.PositionFurLabel.frame;CGRect pcanFrame = cell.PositionCancelLabel.frame;CGRect genderFrame = cell.GenderLabel.frame;CGRect degreeFrame = cell.DegreeLabel.frame;CGRect birthFrame = cell.BirthLabel.frame;CGRect partyFrame = cell.PartyLabel.frame;CGRect otherFrame = cell.OtherLabel.frame;//修改label的高度pnameFrame.size.height = labelHeight;pnowFrame.size.height = labelHeight;pfurFrame.size.height = labelHeight;pcanFrame.size.height = labelHeight;genderFrame.size.height = labelHeight;degreeFrame.size.height = labelHeight;birthFrame.size.height = labelHeight;partyFrame.size.height = labelHeight;otherFrame.size.height = labelHeight;//更新label的信息cell.PersonNameLabel.frame = pnameFrame;cell.PositionNowLabel.frame = pnowFrame;cell.PositionFurLabel.frame = pfurFrame;cell.PositionCancelLabel.frame = pcanFrame;cell.GenderLabel.frame = genderFrame;cell.DegreeLabel.frame = degreeFrame;cell.BirthLabel.frame = birthFrame;cell.PartyLabel.frame = partyFrame;cell.OtherLabel.frame = otherFrame;//设置label内容cell.PersonNameLabel.text = pnameContent;cell.PositionNowLabel.text = pnowContent;cell.PositionFurLabel.text = pfurContent;cell.PositionCancelLabel.text = pcancelContent;cell.GenderLabel.text = genderContent;cell.DegreeLabel.text = degreeContent;cell.BirthLabel.text = birthContent;cell.PartyLabel.text = partyContent;cell.OtherLabel.text = infoContent;……}
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编译运行，搞定……
我会告诉你在这之前我都是先打开“预览”，然后再通过点击来选择截图功能的？
- 1. Command-Shift-3: 将整个屏幕拍下并保存到桌面。
- 2. Command-Shift-Control-3:将整个屏幕拍下并保存到剪贴板(Clipboard)，然后Command+V直接粘贴到如Photoshop，ppt等软件中编辑。
- 3. Command-Shift-4:将屏幕的一部分拍下并保存到桌面。按下这个组合键后，光标会变为一个十字，你可以拖拉来选取拍摄区域。
- 4. Command-Shift-Control-4:将屏幕的一部分拍下并保存到剪贴板。
- 5. Command-Shift-4再按空格键:这时光标会变为一个照相机图标，点击可拍下当前窗口或菜单或Dock以及图标等，只要将照相机图标移动到不同区域（有效区域会显示为浅蓝色）点击。
- 6. Command-Shift-Control-4再按空格键:将选取的窗口或其他区域的快照保存到剪贴板。