1. Xcode 修改模板:在此路径中修改相应的模板
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Templates/File\ Templates/Source/Cocoa\ Touch\ Class.xctemplate
宏的意义
2. [!] Failed to connect to GitHub to update the CocoaPods/Specs specs repo - Please check if you are offline, or that GitHub is down
Github在不久之前的2018年2月23号移除了一些低加密标准协议，包括TLSv1/TLSv1.1，diffie-hellman-group1-sha1，diffie-hellman-group14-sha1，相关链接在这里：Weak cryptographic standards removed
这就意味着Mac系统对应的openssl也需要更新。升级办法:stackoverflow
$ pod repo remove master
$ pod setup
$ pod install
$ pod install
Setting up CocoaPods master repo
$ /usr/bin/git clone https://github.com/CocoaPods/Specs.git master --progress
Cloning into 'master'...
remote: Counting objects: 2013972, done.
remote: Compressing objects: 100% (424/424), done.
remote: Total 2013972 (delta 185), reused 35 (delta 35), pack-reused 2013484
Receiving objects: 100% (2013972/2013972), 524.06 MiB | 921.00 KiB/s, done.
Resolving deltas: 100% (1128315/1128315), done.
Checking out files: 100% (224716/224716), done.
CocoaPods 1.5.0.beta.1 is available.
To update use: `sudo gem install cocoapods --pre`
[!] This is a test version we'd love you to try.
For more information, see https://blog.cocoapods.org and the CHANGELOG for this version at https://github.com/CocoaPods/CocoaPods/releases/tag/1.5.0.beta.1
2018.8.28 https://gems.ruby-china.org/ 域名更新为 https://gems.ruby-china.com
更新macOS High Sierra 11.3 报错:-bash: /usr/local/bin/pod: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby: bad interpreter: No such file or directory
$ brew reinstall cocoapods
$ brew install ruby
$ brew link --overwrite cocoapods
ERROR: While executing gem ... (TypeError) no implicit conversion of nil into String
$ sudo gem install cocoapods
Password:
ERROR: While executing gem ... (TypeError)
no implicit conversion of nil into String
$ sudo gem update --system //先更新 Ruby
3. 各种波纹动画
4. collectionView瞧不出的方法
//定义每个Cell的大小
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
CGSize size = CGSizeMake(80,80);
return size;
}
//定义每个Section的四边间距
-(UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{
return UIEdgeInsetsMake(15, 15, 5, 15);//分别为上、左、下、右
}
//这个是两行cell之间的间距（上下行cell的间距）
-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{
return 0.8;
}
//两个cell之间的间距（同一行的cell的间距）
-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section{
return 0.8;
}
5. 图片
1.拉伸
UIImageView *backImgV = [RJInitViewTool rj_initImageViewWithSuperView:self.contentView];
UIImage *image = [UIImage imageNamed:@"product_detail_pinglun_bg"];
// 左端盖宽度
NSInteger leftCapWidth = image.size.width * 0.5f;
// 顶端盖高度
NSInteger topCapHeight = image.size.height * 0.5f;
// 重新赋值
image = [image stretchableImageWithLeftCapWidth:leftCapWidth topCapHeight:topCapHeight];
backImgV.image = image;
- (UIImage *)stretchableImageWithLeftCapWidth:(NSInteger)leftCapWidth topCapHeight:(NSInteger)topCapHeight __TVOS_PROHIBITED;
- (UIImage *)resizableImageWithCapInsets:(UIEdgeInsets)capInsets NS_AVAILABLE_IOS(5_0); // create a resizable version of this image. the interior is tiled when drawn.
2.旋转
UIImage *img = [UIImage imageNamed:@"homepage_genggai"];
UIImage *image = [UIImage imageWithCGImage:img.CGImage scale:2.0 orientation:UIImageOrientationRight];
imageView.image = image;
3.改变图片颜色
- (UIImage *)imageWithColor:(UIColor *)color image:(UIImage *)image{
UIGraphicsBeginImageContextWithOptions(image.size, NO, 1);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(context, 0, image.size.height);
CGContextScaleCTM(context, 1.0, -1.0);
CGContextSetBlendMode(context, kCGBlendModeNormal);
CGRect rect = CGRectMake(0, 0, image.size.width, image.size.height);
CGContextClipToMask(context, rect, image.CGImage);
[color setFill];
CGContextFillRect(context, rect);
UIImage*newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
4.View的内容生成一张图片
/*UIGraphicsBeginImageContextWithOptions
CGSize size 区域大小
BOOL opaque 是否是非透明的。如果需要显示半透明效果，需要传NO，否则传YES
CGFloat scale 屏幕密度
*/
+(UIImage *)hbsc_imageFromView:(UIView *)view{
UIGraphicsBeginImageContextWithOptions(view.bounds.size, NO, [UIScreen mainScreen].scale);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage*image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
6. UILabel放入图片
UILabel *imageLabel = [UILabel new];
NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
attachment.image = [UIImage imageNamed:@"product_detail_daijinquan"];
attachment.bounds = CGRectMake(0, 0, 15, 15);
NSAttributedString *attributedString = [NSAttributedString attributedStringWithAttachment:attachment];
imageLabel.attributedText = attributedString;
7. iPhoneX
#define KIsiPhoneX ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(1125, 2436), [[UIScreen mainScreen] currentMode].size) : NO)
//frame布局
if (@available(iOS 11.0, *)) {
self.view.safeAreaInsets.bottom
}else {
}
//masonry布局
if (@available(iOS 11.0, *)) {
make.bottom.equalTo(self.view.mas_safeAreaLayoutGuideBottom);
} else {
make.bottom.equalTo(self.view);
}
8. UITableview 全局刷新跳动
self.tableView.estimatedRowHeight = 0;
self.tableView.estimatedSectionHeaderHeight = 0;
self.tableView.estimatedSectionFooterHeight = 0;
8. 半透明Modal控制器解决方案
方法一
self.view.backgroundColor = [UIColor clearColor];
self.providesPresentationContextTransitionStyle = YES;
self.definesPresentationContext = YES;
self.modalPresentationStyle = UIModalPresentationOverCurrentContext;
方法二(基于方法一,解决tabbar跟控制器Modal)
UIViewController *VC = [[UIViewController alloc] init];
VC.userDetailModel = self.userDetailModel;
[[UIApplication sharedApplication].delegate.window.rootViewController presentViewController:VC animated:NO completion:nil];
9. UICollectionViewCell自适应大小
//该方法会出现丢cell的BUG
//layout.estimatedItemSize = CGSizeMake(20, 28);
-(UICollectionViewLayoutAttributes *)preferredLayoutAttributesFittingAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes{
UICollectionViewLayoutAttributes *attributes = [super preferredLayoutAttributesFittingAttributes:layoutAttributes];
CGRect frame = [self.textButton.titleLabel.text boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, 15) options:(NSStringDrawingUsesLineFragmentOrigin) attributes:[NSDictionary dictionaryWithObjectsAndKeys:kHCFont_26,NSFontAttributeName, nil] context:nil];
frame.size.width = frame.size.width + 20;
frame.size.height = 28;
attributes.frame = frame;
return attributes;
}
//设置每个Cell 的宽高(简单地替换方法)
//layout.itemSize = CGSizeMake(10, 28);
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(nonnull UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(nonnull NSIndexPath *)indexPath{
RJModel *model = self.modelArray[indexPath.row];
CGRect frame = [model.name boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, 15) options:(NSStringDrawingUsesLineFragmentOrigin) attributes:[NSDictionary dictionaryWithObjectsAndKeys:kHCFont_26,NSFontAttributeName, nil] context:nil];
return CGSizeMake(frame.size.width+20, 28);
}
10. UITabBarController配置相关
//TabBarItem添加动画
-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item{
NSInteger index = [self.tabBar.items indexOfObject:item];
if (index != self.indexFlag) {
//执行动画
NSMutableArray *arry = [NSMutableArray array];
for (UIView *btn in self.tabBar.subviews) {
if ([btn isKindOfClass:NSClassFromString(@"UITabBarButton")]) {
[arry addObject:btn]; }}
//添加动画
[[arry[index] layer] addAnimation:[RJCoreTool rj_randomTransform] forKey:nil];
//移除其他tabbar的动画
for (int i = 0; i<arry.count; i++) {
if (i != index) {
[[arry[i] layer] removeAllAnimations];}}
self.indexFlag = index;
}
}
//整体颜色渲染
self.tabBar.tintColor = [UIColor blueColor];
[[UITabBarItem appearance] setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:11]} forState:UIControlStateNormal];
//未选中字体颜色
[[UITabBarItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor randomColor],NSFontAttributeName:[UIFont systemFontOfSize:11]} forState:UIControlStateNormal];
//选中字体颜色
[[UITabBarItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor randomColor],NSFontAttributeName:[UIFont systemFontOfSize:11]} forState:UIControlStateSelected];
self.tabBar.backgroundColor = [UIColor whiteColor];//不设置为半透明
self.tabBar.backgroundImage = [UIImage imageNamed:@"Beautimage14"];
11. UINavigationController配置相关
#import "RJNavigationViewController.h"
@interface RJNavigationViewController ()<UIGestureRecognizerDelegate>
@end
@implementation RJNavigationViewController
-(void)viewDidLoad{
[super viewDidLoad];
// 添加全屏返回手势
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self.interactivePopGestureRecognizer.delegate action:@selector(handleNavigationTransition:)];
[self.view addGestureRecognizer:pan];
// 不允许边缘手势触发
self.interactivePopGestureRecognizer.enabled = NO;
// 实现滑动返回功能
pan.delegate = self;
}
#pragma mark - UIGestureRecognizerDelegate
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
return self.childViewControllers.count != 1;
}
+(void)load{
// 修改当前导航控制器下导航条
// 1 appearanceWhenContainedIn:获取某个类下面全局外观，获取RJNavigationViewController所有导航条
UINavigationBar *bar = [UINavigationBar appearanceWhenContainedIn:self, nil];
// 2 设置导航条标题 变大变宽 => 导航条
bar.titleTextAttributes = @{NSFontAttributeName:[UIFont boldSystemFontOfSize:18]};
// 3 设置导航条背景图片:一定要使用Default
[bar setBackgroundImage:[UIImage imageNamed:@"beaut_1"] forBarMetrics:UIBarMetricsDefault];
[bar setShadowImage:[UIImage new]];
}
// 设置非根控制器返回按钮
-(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
if (self.childViewControllers.count) {//非根控制器
// 1 创建返回按钮
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.layer.cornerRadius = 10;
button.layer.borderColor = WHITE.CGColor;
button.layer.borderWidth = 1;
[button setTitle:@"← ⚔" forState:UIControlStateNormal];
[button addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
// 2 把按钮往左边挪动
[button sizeToFit];
button.contentEdgeInsets = UIEdgeInsetsMake(0, -28, 0, 0);
// 3 覆盖系统返回按钮
viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
viewController.hidesBottomBarWhenPushed = YES;
}
// 4 注意。一定要记得调用super
[super pushViewController:viewController animated:animated];
}
-(void)back{
[self popViewControllerAnimated:YES];
}
@end
12. iOS富文本字符串AttributedString详解
13. UILabel宽度固定, 字体大小自适应
//方法一
self.yueL.adjustsFontSizeToFitWidth = YES;
//方法二 : NS_DEPRECATED_IOS(2_0, 7_0)
CGFloat fontSize;
[self.yueL.text sizeWithFont:[UIFont systemFontOfSize:20]
minFontSize:10.0
actualFontSize:&fontSize
forWidth:200
lineBreakMode:NSLineBreakByWordWrapping];
self.yueL.font = [UIFont systemFontOfSize:fontSize];
14. 计算文字高度
//NS_DEPRECATED_IOS(2_0, 7_0)
[string sizeWithFont:[UIFont systemFontOfSize:12]
constrainedToSize:CGSizeMake(200, CGFLOAT_MAX)
lineBreakMode:NSLineBreakByWordWrapping];
//NS_AVAILABLE(10_11, 7_0)
[string boundingRectWithSize:CGSizeMake(labelWidth, MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:@{NSFontAttributeName:font}
context:nil]
15. NSString 和 NSArray相互转化
//将array数组转换为string字符串
NSString *tempString = [array componentsJoinedByString:@","];
//将string字符串转换为array数组
NSArray *tempArray = [string componentsSeparatedByString:@","];
16. tableView顶端图片放大效果
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
CGFloat offsetY = scrollView.contentOffset.y;
NSLog(@"%@",NSStringFromCGPoint(scrollView.contentOffset));
if (offsetY <= 0) {
self.headerView.frame = CGRectMake(offsetY / 2.0, offsetY, kScreenWidth - offsetY, 266 - offsetY);
}
}
- (UIView *)headerView {
if(!_headerView) {
_headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, 266)];
self.tableView.tableHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, 266)];
[self.tableView addSubview:_headerView];
}
return _headerView;
}
17 Mac10.13 Pod报错 / Xcode 9.4 更新报错
1、 Xcode 9.4 更新报错
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
解决:$ xcode-select --install
2、 Mac10.13 Pod报错
: /usr/local/bin/pod: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby: bad interpreter: No such file or directory
解决:
$ brew link --overwrite cocoapods
Error: No such keg: /usr/local/Cellar/cocoapods
$ brew reinstall cocoapods
Error: No such keg: /usr/local/Cellar/cocoapods
jiegegedexiaolingtong:HobayNew yishangyun$ brew reinstall cocoapods
==> Reinstalling cocoapods
==> Downloading https://homebrew.bintray.com/bottles/cocoapods-1.4.0.high_sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring cocoapods-1.4.0.high_sierra.bottle.tar.gz
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink bin/pod
Target /usr/local/bin/pod
already exists. You may want to remove it:
rm '/usr/local/bin/pod'
To force the link and overwrite all conflicting files:
brew link --overwrite cocoapods
To list all files that would be deleted:
brew link --overwrite --dry-run cocoapods
Possible conflicting files are:
/usr/local/bin/pod
/usr/local/bin/xcodeproj
==> Summary
🍺 /usr/local/Cellar/cocoapods/1.4.0: 8,818 files, 13.0MB
//$ brew install ruby可省略该命令
$ brew link --overwrite cocoapods
Linking /usr/local/Cellar/cocoapods/1.4.0... 2 symlinks created
18 四舍五入保留两位小数
-(float)roundFloat:(float)price{
CGFloat myF = floor(price*10000)/10000;
return (floorf(myF*100 + 0.5))/100;
}
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