我有一个UITabBarController,在初始运行时,我想覆盖登录视图控制器但收到错误.
对<UITabBarController:0x863ae00>的开始/结束外观转换的不平衡调用.
下面是代码.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
UIViewController *lessonVC = [[[LessonViewController alloc] initWithNibName:@"LessonViewController" bundle:nil] autorelease];
UIViewController *programVC = [[[ProgramViewController alloc] initWithNibName:@"ProgramViewController" bundle:nil] autorelease];
UIViewController *flashcardVC = [[[FlashCardViewController alloc] initWithNibName:@"FlashCardViewController" bundle:nil] autorelease];
UIViewController *moreVC = [[[MoreViewController alloc] initWithNibName:@"MoreViewController" bundle:nil] autorelease];
UINavigationController *lessonNVC = [[[UINavigationController alloc] initWithRootViewController:lessonVC] autorelease];
UINavigationController *programNVC = [[[UINavigationController alloc] initWithRootViewController:programVC] autorelease];
UINavigationController …Run Code Online (Sandbox Code Playgroud) let str1 = ""
let str2 = "....."
println("\(countElements(str1)), \(countElements(str2))")
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结果:1,10
但是str1不应该有5个元素吗?
这个错误似乎只发生在我使用标志表情符号时.
我已阅读并试用这篇文章(使用Core Animation打开门效果)
我在我的应用程序中实现以下代码:
CALayer *layer = threeHomeView.layer;
CATransform3D initialTransform = threeHomeView.layer.transform;
initialTransform.m34 = 1.0 / -900;
[UIView beginAnimations:@"Scale" context:nil];
[UIView setAnimationDuration:3];
layer.transform = initialTransform;
CATransform3D rotationAndPerspectiveTransform = threeHomeView.layer.transform;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform
, 40.0f * M_PI / 180.0f
, 0.0f
, 1.0f
, 0.0f);
layer.transform = rotationAndPerspectiveTransform;
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(threeHomeFlyOut)];
[UIView commitAnimations];
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threeHomeView是一个UIImageView.
我的问题是:图像只能通过图像的中间垂直线旋转,但我想让它按图像的左垂直线旋转.
我的应用程序支持iOS 7+,我使用UIActivity图像大小:iPhone为60pt,iOS为iPad为76pt,
当触摸更多按钮重新排序项目时,它无法显示列表中的图标.


代码如下:
class ZYShare {
class ActivityItem {
init() {
self.title = ""
self.icon = ""
}
var title: String?
var icon: String?
var type: ShareType = ShareTypeAny
}
class CommonActivity: UIActivity {
lazy var itemInfo = ActivityItem()
override func prepareWithActivityItems(activityItems: [AnyObject]) {
// do something
}
override func canPerformWithActivityItems(activityItems: [AnyObject]) -> Bool {
return true
}
override class func activityCategory() -> UIActivityCategory {
return UIActivityCategory.Action
}
override func activityType() -> String? {
return NSLocalizedString(itemInfo.title ?? "", comment: …Run Code Online (Sandbox Code Playgroud) 我有这个反应本机项目,我在多台计算机上工作,在我的 MacBook 中一切正常,当我在运行“npm install”后运行“pod install”时,pods 项目成功创建,另一方面,当我在我的桌面出现以下错误:
我试过为其他项目安装 pod,一切正常,尤其是这个项目的问题。
更新:
感谢您的评论,让您知道:
运行后:
pod repo remove trunk
pod install
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这就是我得到的:
这是我的 package.json:
{
"name": "aksystems",
"version": "3.9.8",
"description": "",
"author": "",
"private": true,
"scripts": {
"start": "react-native start",
"test": "jest",
"lint": "eslint .",
"ios": "cd ios/ && rm -rf Pods/ && rm -rf Podfile.lock && pod install && cd ../ && react-native run-ios",
"android": "cd android/ && ./gradlew clean && cd ../ && react-native run-android",
"build:ios": "node node_modules/react-native/local-cli/cli.js bundle --entry-file='index.js' --bundle-output='./ios/mstore/main.jsbundle' --dev=false …Run Code Online (Sandbox Code Playgroud) 我想在UIWebview中打开需要密码和用户名的URL.比如打开我的本地Wifi路由器(192.168.1.1).但是当我尝试使用代码时,Safari没有弹出窗口要求密码和用户名.
NSURL *url = [NSURL URLWithString:@"http://192.168.1.1"];
NSURLRequest *httpReq = [NSURLRequest requestWithURL:url];
[self._webView loadRequest:httpReq];
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由于有人告诉我使用NSURLConnectionDelegate,我知道这一点,但我不知道如何向UIWebView显示授权页面.
如何制作具有角度的IBDesignable组件:旋转视图的CGFloat属性
import UIKit
@IBDesignable
class MyB: UIButton {
@IBInspectable
var angle: CGFloat = 0 {
didSet {
//What to put here?
}
}
override init(frame: CGRect) {
super.init(frame: frame)
// Initialization code
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
}
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我试过了
self.transform = CGAffineTransformMakeRotation(angle)
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但它不起作用
这是示例项目源代码:示例代码
import SwiftUI
struct TestMenuInSafeAreaInset: View {
@State private var message = ""
var body: some View {
VStack {
Rectangle()
.fill(Color.blue)
}
.safeAreaInset(edge: .bottom) {
HStack {
TextField("Input your message", text: $message)
.padding()
.background(Color.brown)
.cornerRadius(12)
.foregroundColor(.white)
Menu {
Button {
} label: {
Text("Confirm")
}
Button {
} label: {
Text("Cancel")
}
} label: {
Image(systemName: "square.and.arrow.up.fill")
.tint(.white)
.padding()
.background(Color.brown)
.cornerRadius(50)
}
}
.padding()
}
}
}
struct TestMenuInSafeAreaInset_Previews: PreviewProvider {
static var previews: some View {
TestMenuInSafeAreaInset() …Run Code Online (Sandbox Code Playgroud) 我的应用程序有一个带有自定义单元格的tableview(包括textfield,label和button),我想从tableview生成一个pdf文件.
贝娄是代码(现在假设tableview的内容全部可见):
UIGraphicsBeginImageContext(self._tableView.bounds.size);
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, self._tableView.bounds.size.width, self._tableView.bounds.size.height), nil);
// what's the code here?
// [self._tableView drawInRect:];
UIGraphicsEndPDFContext();
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我总是生成一个空白的pdf文件.目前我所做的是将tableview生成为图像,然后将图像绘制到当前上下文,然后获取pdf文件.但任何好主意?
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil;
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
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为什么我加; 在功能结束时也是正确的?
我正在使用Xcode 6.0 beta 4,我发现它中的按钮UICollectionViewCell不响应水龙头.
细节如下:
UICollectionViewController
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--- UICollectionViewCell
------ UIButton(UIButton有两个autolayout约束,放在UIButton垂直中心和水平中心Cell)
现在使cell大小如下:(300,1000)
在iPhone模拟器或iOS 7.0或7.1.x设备中运行应用程序,按钮不可触摸,但在iOS 8.0模拟器中测试没关系.另外,如果我改变小区size到(300, 200),按钮的工作原理.
我认为这是Xcode测试版中的一个错误,对吧?
我可以在哪里解决这个问题?
我使用OS 10.10,Xcode 6 GM,我的项目由swift(&Objective-C)编写.
该项目可以使用Xcode 6-beta7运行.
Process: Xcode [7267]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 6.0 (6299)
Build Info: IDEFrameworks-6299000000000000~8
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [7267]
User ID: 501
Date/Time: 2014-09-10 17:25:38.697 +0800
OS Version: Mac OS X 10.10 (14A343f)
Report Version: 11
Anonymous UUID: 587D71D4-C53F-50BF-625D-CF092416EEDC
Time Awake Since Boot: 12000 seconds
Crashed Thread: 14 Dispatch queue: shared-compile-command-queue :: NSOperation 0x7f887f8aa900 (QOS: UTILITY)
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
ProductBuildVersion: 6A313 …Run Code Online (Sandbox Code Playgroud) ios ×5
iphone ×5
swift ×3
xcode6 ×2
cdn ×1
cocoapods ×1
emoji ×1
ios16 ×1
ipad ×1
objective-c ×1
react-native ×1
safearea ×1
share ×1
swiftui ×1
transitions ×1
uiactivity ×1
uibutton ×1
uitableview ×1
uiwebview ×1
unicode ×1
xcode6gm ×1