目录
- maskView动画原理 ：遮罩
- button倒计时闪烁解决
- 改变从xib拖出来约束，没有动画效果解决办法:添加 layoutIfNeeded
- 去除导航栏底部1px横线
- UIWebView直接打开PDF文件
- 改变StatusBar颜色
- UICollectionView 和 UITableView 顶部留白处理
- TableView底下多余的分割线去除
- webView真正加载完成
- UIButton 只有title的时候，把 title 靠左对齐
- Restoration ID 和 UITableViewCell 的identifier的区别
- UIButton 的 SEL 换成block
- UIImage指定范围内拉伸 - 聊天气泡背景图
- NSAttributeString设置文本位置居中、靠左
- 打开系统相机、使用searchBarController等 标题显示英文解决
- label 设置文字渐变色 [设置渐变色几种方式]
- 设置导航栏上返回图标和title为空
- Could not load NIB in bundle 错误。 nib文件存在，找不到，原因是没有选中 'Target Membership'
- Mac OS 系统更新到了 high Sierra ，pod 不能用了 报错
- 文本转语音播放
- present出来一个半透明的view controller
- NSAspects 使用
- UITextField 明文密文切换光标位置不准
- UITextField 右对齐在末尾输入空格不显示
- 禁用第三方键盘
- OC计算字符串中字符个数(汉字2个字符，英文字母、数字、空格1个字符)
- iOS 启动图问题
- 简书生成图片分享iOS实现
- bundle name 和 bundle display name
- Localizations中Resources中显示0 files Localized
- 获取当前系统语言
- 打包上传APP到iTunes connect时候出错。
- UIPickerView UIDatePicker 分割线去除
- 各一个有圆角的view添加阴影效果
- 设置按钮不可点击状态时的背景色，颜色有误差。原因是系统自动加了层蒙版。
- 自定义返回按钮导致系统的右滑返回手势失效
- 隐藏导航栏
- pop到上上一级vc
- uitextfield输入内容过长时候，字符不自动左移问题
- 导航栏上添加视图frame问题
- 同时重写setter getter ，实例变量报错问题
- 选择模拟器/真机，显示no scheme
- Xcode增加编译环境 debug release 新增preProduct
- UITextField光标换成图片
- 封装pod库时带上资源bundle
- UISider滑动和pan手势滑动冲突
- 键盘弹起自动上滑tableview
- Cancle换成汉字『取消』
- 日期格式化 https://www.cnblogs.com/Cristen/p/3599922.html
- 已经纳入版本管理的文件，加入.gitignore不生效的问题
- git添加子模块submodule
- git移除子模块
- 去除main.storyboard
- cell选中时，子视图背景颜色受影响
- didselected方法不管用
随手记
maskView动画原理 ：遮罩
-
button倒计时闪烁解决
把按钮样式设为custom而非system
-
把下面代码中注释掉的两行放开
-(void)ticktack { __block int timeout = 59; dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue); dispatch_source_set_timer(_timer, dispatch_walltime(NULL, 0), 1.0*NSEC_PER_SEC, 0); dispatch_source_set_event_handler(_timer, ^{ dispatch_async(dispatch_get_main_queue(), ^{ if (timeout <= 0) {//倒计时结束，关闭 dispatch_source_cancel(_timer); // self.sendCodeBtn.titleLabel.text = @"获取验证码"; [self.sendCodeBtn setTitle:@"获取验证码" forState:UIControlStateNormal]; self.sendCodeBtn.userInteractionEnabled = YES; self.sendCodeBtn.enabled = YES; } else { // self.sendCodeBtn.titleLabel.text = [NSString stringWithFormat:@"%d秒后重新发送",timeout]; [self.sendCodeBtn setTitle:[NSString stringWithFormat:@"%d秒后重新发送",timeout] forState:UIControlStateNormal]; self.sendCodeBtn.userInteractionEnabled = NO; self.sendCodeBtn.enabled = NO; timeout--; } }); }); dispatch_resume(_timer); }
-
改变从xib拖出来约束，没有动画效果解决办法:添加 layoutIfNeeded
[UIView animateWithDuration:0.5 animations:^{ self.passwdLoginContainLeadingContain.constant = -ScreenWidth; [self.view layoutIfNeeded]; } completion:^(BOOL finished) { }]; -
去除导航栏底部1px横线
UINavigationBar *navBar = self.navigationController.navigationBar; [navBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault]; [navBar setShadowImage:[UIImage new]]; -
UIWebView直接打开PDF文件
NSURLRequest *req = [NSURLRequest alloc] initWithUrl:[NSURL urlWithfilePath:filePath]]; webView.scalesPageToFit = YES; webView.loadRequest -
改变StatusBar颜色
UINavigationBar *navBar = self.navigationController.navigationBar; _statusView = [[UIView alloc] initWithFrame:CGRectMake(0, -20, ScreenWidth, 20)]; _statusView.backgroundColor = [UIColor colorWithRed:241/255.0 green:241/255.0 blue:241/255.0 alpha:1]; [navBar addSubview:_statusView]; -
UICollectionView 和 UITableView 顶部留白处理
self.automaticallyAdjustsScrollViewInsets = NO -
TableView底下多余的分割线去除
self.tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero]; -
webView真正加载完成
webViewDidFinishLoad: 方法在页面重定向的时候会被多次加载，用webView.isLoading判断是否还在加载
-
UIButton 只有title的时候，把 title 靠左对齐
btn.contentHorizontalAlignment = UIControlContentHorizontalAlignment.left // btn.titleLabel?.textAlignment = NSTextAlignment.left 这句不管用 Restoration ID 和 UITableViewCell 的identifier的区别
- Restoration ID Preserving and Restoring State
用于存储和恢复应用状态。一个应用进入后台，再进入前台显示的还是之前的页面，优化用户体验 - Identifer 用于从xib或者故事版里创建一个实例
- UIButton 的 SEL 换成block
@class QSBlockButton;
#pragma mark class QSBlockButton
typedef void(^ActionBlock)(QSBlockButton *);
@interface QSBlockButton : UIButton
@property (copy, nonatomic) ActionBlock block;
@end
@implementation QSBlockButton
- (instancetype)init {
self = [super init];
if (self) {
[self addTarget:self action:@selector(touchAction:) forControlEvents:UIControlEventTouchUpInside];
}
return self;
}
- (void)touchAction:(id)sender{
_block(self);
}
-
UIImage指定范围内拉伸 - 聊天气泡背景图
UIImage *imgBack = [bkImg stretchableImageWithLeftCapWidth:0 topCapHeight:2]; NSAttributeString设置文本位置居中、靠左
NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc]init];
paragraph.alignment = NSTextAlignmentJustified;
NSDictionary *dic = @{NSParagraphStyleAttributeName : paragraph]};
打开系统相机、使用searchBarController等 标题显示英文解决：在
info.plist中添加Localized resources can be mixed设为YES-
label 设置文字渐变色 设置渐变色几种方式
方式一 ： NSArray *gradientColors = @[(id)ColorFromRGB(0xff7f43).CGColor, (id)ColorFromRGB(0xff3609).CGColor]; _titleLabel = [[UILabel alloc] init]; self.titleLabel.text = title; self.titleLabel.font = [UIFont systemFontOfSize:12]; [self.titleLabel sizeToFit]; if (self.titleLabel.frame.size.width > self.rightView.frame.size.width) { self.titleLabel.frame = CGRectMake(0, 0, self.rightView.frame.size.width, self.rightView.frame.size.height); } else { self.titleLabel.frame = CGRectMake(self.rightView.frame.size.width - _titleLabel.frame.size.width, (self.rightView.frame.size.height-_titleLabel.frame.size.height)/2, _titleLabel.frame.size.width, _titleLabel.frame.size.height); } [self.rightView addSubview:self.titleLabel]; // 创建渐变层 CAGradientLayer *gradientLayer = [CAGradientLayer layer]; gradientLayer.frame = self.titleLabel.frame; gradientLayer.colors = gradientColors; gradientLayer.startPoint = CGPointMake(0, 1); gradientLayer.endPoint = CGPointMake(1, 1); NSArray *layers = self.rightView.layer.sublayers; NSMutableArray *murr = [NSMutableArray arrayWithArray:layers]; for (CALayer *l in murr) { if ([l isKindOfClass:[CAGradientLayer class]]) { [l removeFromSuperlayer]; } } [self.rightView.layer addSublayer:gradientLayer]; gradientLayer.mask = self.titleLabel.layer; self.titleLabel.frame = gradientLayer.bounds; -
设置导航栏上返回图标和title为空
self.navigationController?.navigationBar.backIndicatorImage = #imageLiteral(resourceName: "back").withRenderingMode(.alwaysOriginal) self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil) -
Could not load NIB in bundle 错误。 nib文件存在，找不到，原因是没有选中 'Target Membership'
屏幕快照 2017-11-14 10.34.41.png -
Mac OS 系统更新到了 high Sierra ，pod 不能用了 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
解决：重新安装cocoapods ‘sudo gem install cocoapods’
屏幕快照 2017-11-14 16.35.29.png
重新安装cocoapods完成
-
文本转语音播放
let utterance = AVSpeechUtterance.init(string: "Hello,我觉得吧...") let synthesizer = AVSpeechSynthesizer.init() synthesizer.speak(utterance) NSTimer后台运行
- (void)viewDidLoad {
[super viewDidLoad];
_count = 10;
[[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];
_timer =[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(ticktock:) userInfo:nil repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:_timer forMode:(NSRunLoopCommonModes)];
}
- (void)ticktock:(NSTimer *)sender {
if (_count > 0) {
_count--;
_label.text = [NSString stringWithFormat:@"%ld",_count];
NSLog(@"%@",_label.text);
}
else {
[_timer invalidate];
}
}
-
present出来一个半透明的view controller
DSBirthdayViewController *birthdayVC = [[DSBirthdayViewController alloc] init]; birthdayVC.modalPresentationStyle = UIModalPresentationOverCurrentContext; [self presentViewController:birthdayVC animated:YES completion:^{ }]; -
NSAspects 使用
[NSAspects hookMethodForObject:people selector:@selector(drink) withOptions:(AspectPositionInstead | AspectOptionAutomaticRemoval ) usingBlock:^(void){ NSLog(@"eat"); } error:nil]; UITextField 明文密文切换光标位置不准
两种解决方式： 1. 注释中语句 2. if 里语句
企业微信截图_0be30471-7ebc-4ff0-8d82-6ccf88f48dab.png
-
UITextField 右对齐在末尾输入空格不显示
//1. 自定义TextField // .h @interface MTTextField : UITextField @end //.m @implementation MTTextField - (instancetype)init { self = [super init]; if (self) { [self addTarget:self action:@selector(replaceNormalSpaceUsingNonbreakingSpace) forControlEvents:UIControlEventEditingChanged]; } return self; } - (void)replaceNormalSpaceUsingNonbreakingSpace { UITextRange *textRange = self.selectedTextRange; self.text = [self.text stringByReplacingOccurrencesOfString:@" " withString:@"\u00a0"]; [self setSelectedTextRange:textRange]; } //2. 使用的时候 [[MTObserve(cell.textField, text) skip:1] subscribeNext:^(NSString *x) { @strongify(self) NSString *text = [x stringByReplacingOccurrencesOfString:@"\u00a0" withString:@" "]; self.modifyInfoViewModel.nickname = [text trim]; }]; -
禁用第三方键盘
//全局禁第三方键盘 - (BOOL)application:(UIApplication *)application shouldAllowExtensionPointIdentifier:(NSString *)extensionPointIdentifier { return NO; } //某个uitextfield禁第三方键盘 [原文](https://www.pixotech.com/ios8_third_party_custom_keyboard_compatibility/) #pragma mark - 禁用三方键盘 - (BOOL)application:(UIApplication *)application shouldAllowExtensionPointIdentifier:(NSString *)extensionPointIdentifier { if ([extensionPointIdentifier isEqualToString: UIApplicationKeyboardExtensionPointIdentifier]) { id responder = [self findFirstResponder]; if ([responder isKindOfClass:[UITextField class]]) { return NO; } } return YES; } id mt_firstResponder; -(id)findFirstResponder { mt_firstResponder = nil; [[UIApplication sharedApplication] sendAction:@selector(foundFirstResponder:) to:nil from:nil forEvent:nil]; return mt_firstResponder; } -(void)foundFirstResponder:(id)sender { mt_firstResponder = self; } -
OC计算字符串中字符个数(汉字2个字符，英文字母、数字、空格1个字符)
- (NSUInteger)textLength: (NSString *) text { NSUInteger asciiLength = 0; for (NSUInteger i = 0; i < text.length; i++) { unichar uc = [text characterAtIndex: I]; asciiLength += isascii(uc) ? 1 : 2; } NSUInteger unicodeLength = asciiLength; return unicodeLength; }屏幕快照 2018-04-15 19.22.37.png -
iOS 启动图问题
确认各项配置都正确，但是启动图就是不出来。试试删除app，然后重启手机🤦♂️。
Gernal 配置 App Icon and Launch Images 一项时候。使用 Launch Image Source. 而不是 Launch Screen File 时候。要把 4寸屏幕的启动图也加上，不然会导致在 4寸屏幕手机上运行时候，上下有黑色。
使用 Launch Image Source. 而不是 Launch Screen File
屏幕快照 2018-04-26 下午4.57.44.png
- 简书生成图片分享iOS实现
// 内容都放到textView里
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UITextView *textView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
}
- (IBAction)action:(id)sender {
UIImage *image = [self imageWithScreenContentsInView:_textView];
UIImageWriteToSavedPhotosAlbum(image, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil);
}
//在指定的视图内进行截屏操作,返回截屏后的图片
-(UIImage *)imageWithScreenContentsInView:(UIView *)view
{
//根据屏幕大小，获取上下文
UIGraphicsBeginImageContext(_textView.contentSize);
[_textView.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSLog(@"\n=======%@=========\n",NSStringFromClass([obj class]));
if ([NSStringFromClass([obj class]) isEqualToString:@"_UITextContainerView"]) {
[obj.layer renderInContext:UIGraphicsGetCurrentContext()];
}
}];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return viewImage;
}
- (void)imageSavedToPhotosAlbum:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{
if(!error) {
NSLog(@"合影已保存到相册");
}else{
NSLog(@"合影保存失败");
}
}
@end
- bundle name 和 bundle display name
bundle name
is folder name, where your app (including executable file and all resources) will be stored (Cool Program.app)。建议不要修改bundle name (http://blog.csdn.net/kkk0526/article/details/9198355)bundle display name
is what will be shown on iPhone screen，即当你安装该app到iPhone上显示的name。 (http://blog.csdn.net/kkk0526/article/details/9198355)
- Localizations中Resources中显示0 files Localized
原因：这是因为把main.storyboard LaunchImage.storyboard 都删除了。这时候想要添加国际化语言因为是0所以添加不了。
解决：暂时添加个LaunchImage.storyboard，等国际化做好后，就可以删掉了。
- 获取当前系统语言
- (BOOL)isRightLanguages {
NSString *current = [[NSLocale preferredLanguages] objectAtIndex:0];//当前语言 h-Hans-CN 简体中文, zh-Hant-MO繁体中文, en-CN 英文
NSArray *supports = [[NSUserDefaults standardUserDefaults]objectForKey:@"AppleLanguages"];
BOOL is = NO;
for (NSString *sub in supports) {
if ([sub isEqualToString:current]) {
is = YES;
}
}
return is;
}
-
打包上传APP到iTunes connect时候出错。
ERROR ITMS-90475: "Invalid Bundle. Your app supports Multitasking on iPad, so you must include the UILaunchStoryboardName key in your bundle, 'com.sun.allen.app’. Learn more (https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html#//apple_ref/doc/uid/TP40009252-SW40)."
解决：
屏幕快照 2018-05-01 20.44.44.png
-
UIPickerView UIDatePicker 分割线去除
// date picker 分割线去除 self.datePicker.subviews.firstObject.subviews - (void)clearSeparatorView { [self.datePicker.subviews.firstObject.subviews enumerateObjectsUsingBlock:^( UIView *obj, NSUInteger idx, BOOL * stop) { if (obj.frame.size.height < 1) { obj.hidden = YES; } }]; } //UIPickerView 分割线去除 - (void)clearSeparatorView { [self.genderPickerView.subviews enumerateObjectsUsingBlock:^( UIView *obj, NSUInteger idx, BOOL * stop) { if (obj.frame.size.height < 1) { obj.hidden = YES; } }]; } 各一个有圆角的view添加阴影效果
效果图.jpg
MTDealSaleCardView *card = [[MTDealSaleCardView alloc] init];
card.layer.cornerRadius = 4.f;
// card view 的 masksToBounds = YES; 会把阴影效果也切掉。所以要给它增加一个父视图，对父视图做阴影效果
card.layer.masksToBounds = YES;
card.layer.borderColor = [UIColor colorWithHexString:@"#e4e4e4"].CGColor;
card.layer.borderWidth = 0.5;
/**
创建一个cardContainerView盛放card , 对 cardContainerView 做阴影效果
@param card card
@return card的父视图
*/
- (UIView *)createCardShadowEffect:(MTDealSaleCardView *)card {
UIView *cardContainerView = [[UIView alloc] init];
[cardContainerView addSubview:card];
[card mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.top.right.bottom.equalTo(cardContainerView);
}];
//阴影
cardContainerView.layer.shadowColor = [UIColor colorWithHexString:@"0f000000"].CGColor;
cardContainerView.layer.shadowColor = [UIColor yellowColor].CGColor; //todo
cardContainerView.layer.shadowOffset = CGSizeMake(0, 0);
cardContainerView.layer.shadowRadius = 4.f;
cardContainerView.layer.shadowOpacity = 1;
UIBezierPath *path = [UIBezierPath bezierPath];
CGFloat addWH = 4.f;
CGFloat selfWidth = MTRealTimePriceTableViewCell_CardWidth;
CGFloat selfHeight = MTRealTimePriceTableViewCell_CardHeight;
CGPoint topLeft = CGPointMake(0, 0);
CGPoint topMiddle = CGPointMake(selfWidth/2, -addWH);
CGPoint topRight = CGPointMake(selfWidth, 0);
CGPoint leftMiddle = CGPointMake(-addWH, selfHeight/2);
CGPoint leftBottom = CGPointMake(0, selfHeight);
CGPoint rightMiddel = CGPointMake(selfWidth+addWH, selfHeight/2);
CGPoint rightBottom = CGPointMake(selfWidth, selfHeight);
CGPoint bottomMiddel = CGPointMake(selfWidth/2, selfHeight+addWH);
[path moveToPoint:topLeft];
[path addQuadCurveToPoint:topRight controlPoint:topMiddle];
[path addQuadCurveToPoint:rightBottom controlPoint:rightMiddel];
[path addQuadCurveToPoint:leftBottom controlPoint:bottomMiddel];
[path addQuadCurveToPoint:topLeft controlPoint:leftMiddle];
cardContainerView.layer.shadowPath = path.CGPath;
cardContainerView.backgroundColor = [UIColor whiteColor];
return cardContainerView;
}
- 设置按钮不可点击状态时的背景色，颜色有误差。原因是系统自动加了层蒙版。
解决：不使用state，而是通过修改button的是否可交互属性。
//此处不使用按钮绑定command，而是控制按钮的userInteractionEnabled。
//原因是使用绑定command时候，直接设置按钮UIControlStateDiabled的背景颜色，系统会自动加上一层蒙版 导致颜色值不对。
// self.rechargeButton.rac_command = self.viewModel.rechargeCommand;
[self.viewModel.rechargeCommand.enabled subscribeNext:^(NSNumber *x) {
@strongify(self)
if (x.boolValue) {
self.rechargeButton.userInteractionEnabled = YES;
[self.rechargeButton setBackgroundImage:[UIImage imageWithColor:MTThemeColor]
forState:(UIControlStateNormal)];
[self.rechargeButton setTitleAttributes:@{NSFontAttributeName: [UIFont mediumSystemFontOfSize:15], NSForegroundColorAttributeName: [UIColor colorWithHexString:@"#333333"]}
forState:(UIControlStateNormal)];
} else {
self.rechargeButton.userInteractionEnabled = NO;
[self.rechargeButton setBackgroundImage:[UIImage imageWithColor:[UIColor colorWithHexString:@"ececec"]]
forState:(UIControlStateNormal)];
[self.rechargeButton setTitleAttributes:@{NSFontAttributeName: [UIFont mediumSystemFontOfSize:15], NSForegroundColorAttributeName: [UIColor colorWithHexString:@"#c5c5c5"]}
forState:(UIControlStateNormal)];
}
}];
[[self.rechargeButton rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(id x) {
@strongify(self)
[self.viewModel.rechargeCommand execute:nil];
}];
-
自定义返回按钮导致系统的右滑返回手势失效
// 添加上这一行就解决了 self.navigationController.interactivePopGestureRecognizer.delegate = (id)self; // - (void)viewDidAppear:(BOOL)animated{ [super viewDidAppear:animated]; if (self.navigationController.viewControllers.count > 1) { self.navigationController.interactivePopGestureRecognizer.enabled = YES; }else{ self.navigationController.interactivePopGestureRecognizer.enabled = NO; } }
carbon.png
-
pop到上上一级vc
for (NSInteger i = 0; i<self.navigationController.childViewControllers.count; i++) { UIViewController *child = [self.navigationController.childViewControllers objectOrNilAtIndex:i]; if ([child isKindOfClass:[MTApplyRedemptionViewController class]]) { NSMutableArray *tempArr = [NSMutableArray arrayWithArray:self.navigationController.childViewControllers]; [tempArr removeObject:child]; [self.navigationController setViewControllers:tempArr]; break; } } uitextfield输入内容过长时候，字符不自动左移问题 iOS10以下
解决： 增加uitextfield高度
- 导航栏上添加视图frame问题
- (SSPageControl *)pageControl {
if (!_pageControl) {
_pageControl = [[SSPageControl alloc] initWithFrame:CGRectMake(0, 0, 106, 4)];//106是有9张图片的时候的最大宽度 .//必须一开始就把宽度写死，如果动态改变的话会导致iOS10上 pageControl跳动
_pageControl.userInteractionEnabled = NO;
_pageControl.controlNormalSize = 4.f;
_pageControl.controlCurrentSize = 10.f;
_pageControl.controlSpacing = 8.f;
_pageControl.otherBkImg = [UIImage imageWithColor:[UIColor colorWithHexString:@"ffffff50"]];
_pageControl.currentBkImg = [UIImage imageWithColor:[UIColor colorWithHexString:@"ffffff"]];
_pageControl.hidden = YES;
}
return _pageControl;
}
- (void)configurationPageControl {
self.pageControl.numberOfPages = self.viewModel.imageArray.count;
self.pageControl.currentPage = 0;
CGFloat width = [self.pageControl sizeThatFits:CGSizeZero].width;
CGFloat height = self.pageControl.controlNormalSize;
// self.pageControl.frame = CGRectMake(0.0, 0.0, width, height); //不能动态的改变frame
self.pageControl.hidden = (self.viewModel.imageArray.count == 1);
}
self.navigationItem.titleView = self.pageControl;
-
同时重写setter getter ，实例变量报错问题
屏幕快照.png 选择模拟器/真机，显示no scheme
[解决 点击 NO Scheme，新增一个] (https://blog.csdn.net/QearlYu/article/details/53466699)
- Xcode增加编译环境 debug release 新增preProduct
https://blog.csdn.net/FreshManCode/article/details/80354936
屏幕快照 2018-09-12 11.11.39.png
屏幕快照 2018-09-12 11.11.23.png
- UITextField光标换成图片
- 封装pod库时带上资源bundle
图片路径
获取bundle
+ (NSBundle *)ucar_resourceBundle {
NSBundle *bundle = [NSBundle bundleForClass:[TestProjClass class]];
NSURL *url = [bundle URLForResource:@"testProj" withExtension:@"bundle"];
bundle = [NSBundle bundleWithURL:url];
return bundle;
}
获取图片
+ (UIImage *)getImg {
NSLog(@"哈哈哈哈");
NSBundle *bundle = [NSBundle ucar_resourceBundle];
UIImage *image = [UIImage imageNamed:@"ucar_pause.png" inBundle:bundle compatibleWithTraitCollection:nil];
return image;
}
podspec文件中写好bundle路径，把pod库发布出去
s.resource_bundles = {
'testProj' => ['testProj/testProj/testProj/testProj.bundle'],
}
使用示例如下：
屏幕快照 2018-12-10 下午2.50.43.png
-
UISider滑动和pan手势滑动冲突
#pragma mark - UIGestureRecognizerDelegate -(BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldReceiveTouch:(UITouch*)touch { if ([gestureRecognizer isEqual:self.panGR] && [touch.view isEqual:self.progressSilder]) { return NO;// 防止pan手势影响UISlider的响应 } return YES; } 键盘弹起自动上滑tableview
- (void)registerForKeyboardNotifications {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyboardWillShow:(NSNotification *)aNotification {
NSDictionary* info = [aNotification userInfo];
// 注意不要用UIKeyboardFrameBeginUserInfoKey，第三方键盘可能会存在高度不准，相差40高度的问题
CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
// 修改滚动天和tableView的contentInset
self.tableView.contentInset = UIEdgeInsetsMake(0, 0, kbSize.height, 0);
self.tableView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 0, kbSize.height, 0);
// 跳转到当前点击的输入框所在的cell
[UIView animateWithDuration:0.2 animations:^{
[self.tableView scrollToRowAtIndexPath:self.beginEditIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:NO];
}];
}
- (void)keyboardWillBeHidden:(NSNotification *)aNotification {
self.tableView.contentInset = UIEdgeInsetsZero;
self.tableView.scrollIndicatorInsets = UIEdgeInsetsZero;
}
- Cancle换成汉字『取消』
修改info.plist中 "Localization native development region" 成 "China"
屏幕快照 2019-03-02 下午4.34.20.png
IMG_1784.PNG
已经纳入版本管理的文件，加入.gitignore不生效的问题
.gitignore只能忽略那些原来没有被track的文件，如果某些文件已经被纳入了版本管理中，则修改.gitignore是无效的。
只能clone到本地，删除后，再进行忽略。
- git添加子模块submodule
$ git submodule add https://github.com/xxx.git
Cloning into 'xxx'...
remote: Counting objects: 11, done.
remote: Compressing objects: 100% (10/10), done.
remote: Total 11 (delta 0), reused 11 (delta 0)
Unpacking objects: 100% (11/11), done.
Checking connectivity... done.
- git移除子模块
-
cd .git切换到.git目录，修改config，删掉submodule -
cd modules，删除子模块目录 -
cd 项目根目录删除子模块目录
- 去除main.storyboard
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
let win = UIWindow.init(frame: UIScreen.main.bounds)
win.rootViewController = BWRootTabBarController()
win.backgroundColor = UIColor.white
win.makeKeyAndVisible()
self.window = win
return true
}
- cell选中时，子视图背景颜色受影响
- (void)layoutSubviews {
[super layoutSubviews];
self.statusLabel.backgroundColor = [UIColor colorWithHexRGBAString:@"#FF5B45"];
}
- didselected方法不管用
- item/cell上有button或者手势响应了点击事件
Xcode配置
debug包没问题、release包出问题原因。解决方法: 打Release包的时候把 Optimization Level 改成 None， Debug 模式默认就是 None 所以才没问题。
’The file “XXX.app” couldn’t be opened because you don’t have permission to view it.‘ 解决办法: info文件中的字段 Executable file 改成$(PRODUCT_NAME)。
[App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
解决:
屏幕快照 2017-05-22 11.59.02.png
其他
-
ARC环境中使用weak 的修饰符来修饰一个变量，防止其在block中被循环引用，而有些特殊情况下，我们在block中又使用_strong 来修饰这个在block外刚刚用_weak修饰的变量，这是因为在block中调用self会引起循环引用，而在block中需要对weakSelf进行__strong,保证代码在执行到block中，self不会被释放，当block执行完后，会自动释放该strongSelf
eg: AFNetworkReachabilityManager.m 文件中 __weak __typeof(self)weakSelf = self; AFNetworkReachabilityStatusBlock callback = ^(AFNetworkReachabilityStatus status) { __strong __typeof(weakSelf)strongSelf = weakSelf; strongSelf.networkReachabilityStatus = status; if (strongSelf.networkReachabilityStatusBlock) { strongSelf.networkReachabilityStatusBlock(status); } }; block一般用copy修饰。block 使用 copy 是从 MRC 遗留下来的“传统”,在 MRC 中,方法内部的 block 是在栈区的,使用 copy 可以把它放到堆区.在 ARC 中写不写都行：对于 block 使用 copy 还是 strong 效果是一样的，但写上 copy 也无伤大雅，还能时刻提醒我们：编译器自动对 block 进行了 copy 操作。如果不写 copy ，该类的调用者有可能会忘记或者根本不知道“编译器会自动对 block 进行了 copy 操作”，他们有可能会在调用之前自行拷贝属性值。这种操作多余而低效。
PS1: 这段话引自@iOS程序犭袁 的OGitHub - ChenYilong/iOSInterviewQuestions:...《招聘一个靠谱的iOS》面试题参考答案/《招聘一个靠谱的iOS》面试题参考答案（上）.md
PS2: 苹果官方建议。delegate一般用weak修饰，这是为了防止内存泄漏。比方说一个viewController持有一个tableview，tableview的代理是这个viewController。如果用strong修饰delegate，就会造成循环引用。
从xib或者storyboard上拖出来一个控件A，自动就是weak修饰。这是因为控件A放到xib上，已经被xib上的view强引用了。A的创建位置是在xib上，我们在声明属性的位置是要得到这个控件A的引用，用weak就可以了，不会增加引用计数。
OC写方法的时候没写返回值类型[doge]，编译运行通过，默认是id
OC向nil发消息不回崩溃
