我需要我的精灵过渡到一种颜色到另一种颜色然后......就像蓝色色调然后是绿色然后是紫色,但我找不到任何好的动作,我想知道,我应该使用动画吗?或者是否有针对此的合并行动?
我很好奇如何在cocos2d中创建无限背景.例如,假设我正在构建一个从左到右运行的应用程序的应用程序,我希望他无限运行.那么在那种情况下,我必须拥有无尽的背景,这样男人才能继续奔跑.我一直在搜索这个问题,并没有找到任何实际可行的东西.
任何类型的建议,答案和提示都非常感谢.
谢谢
我已经谷歌了。我无法弄清楚发生了什么。
这个:
perror("some error message");
exit(0);
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将其打印到标准输出:
“一些错误信息:成功”
如何根据我的时区从日期时间字符串中获取时间.我的时区时间是格林威治标准时间+5:30.日期时间看起来像 -
04/03/2013 3:30:00 AM
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我希望输出像 -
9:00:00 AM
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提前致谢.
我想创建一个方法并使用字符串值"redColor"为标签设置UIColor.tableColorName是NSString"redColor",我尝试应用选择器来创建UIColor并将其应用于我的textLabel.谢谢
-(void) changeLabelColor
{
SEL labelColor = NSSelectorFromString([NSString stringWithFormat:[@"%@", tableColorName]]);
UIColor *color = [[UIColor class] performSelector:labelColor];
self.textLabel.textColor = color;
}
Run Code Online (Sandbox Code Playgroud) 嗨朋友,我正在练习结构.我有这两个函数返回结构,我将它复制到main中的本地结构.我的第二个函数通过输入不同的实体来更改这些本地struct成员 现在我在调用每个函数后打印结果,令我惊讶的是我注意到两个函数之后的打印结果是一样的.我无法理解这里发生了什么......你能解释一下我...谢谢!
#include <stdio.h>
#include <stdlib.h>
struct student{
char name[30];
float marks;
};
struct student read_student();
void read_student_p(struct student student3);
void print_student(struct student student2);
int main()
{
struct student student1;
student1 = read_student();
print_student(student1);
read_student_p(student1);
print_student(student1);
system("pause");
return 0;
}
//This is my first function
struct student read_student()
{
struct student student2;
printf("enter student name for first function: \n");
scanf("%s",&student2.name);
printf("enter student marks for first function:\n");
scanf("%f",&student2.marks);
return student2;
}
//function to print
void print_student(struct student my_student)
{
printf("Student name …Run Code Online (Sandbox Code Playgroud) 我正在尝试创建一个泛型方法,它将一个SEL参数作为参数传递给dispatch_async执行,但我无法如何执行传入的SEL.请允许有人帮助我.
// Test.m
-(void) executeMe
{
NSLog(@"Hello");
}
- (void)viewDidLoad
{
[super viewDidLoad];
SEL executeSel = @selector(executeMe);
[_pInst Common_Dispatch: executeSel];
}
// Common.m
-(void) Common_Dispatch:(SEL) aSelector
{
dispatch_async(iDispatchWorkerQueue, ^(void) {
// How to execute aSelector here?
});
}
Run Code Online (Sandbox Code Playgroud) 我刚刚开始在objective-c编程,我遇到了"使用未声明的标识符'uneImage'的问题;你的意思是'_uneImage'?".很多帖子谈到这个,但我还没有找到解决方案.
.H :
#import
@interface ViewController : UIViewController
{
UIImagePickerController *picker;
}
@property (weak, nonatomic) IBOutlet UIImageView *uneImage;
- (IBAction)album:(id)sender;
@end
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.M
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (IBAction)album:(id)sender
{
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:picker animated:YES completion:nil];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
uneImage.image = [info objectForKey:UIImagePickerControllerOriginalImage];
[picker dismissViewControllerAnimated:YES completion:nil];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a …Run Code Online (Sandbox Code Playgroud) 我以这种方式将许多不同的图像保存到文档目录:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
int num = arc4random() % 100000000000000;
NSString* path = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithFormat:@"%dtest.png", num]];
NSData* data = UIImagePNGRepresentation(image);
[data writeToFile:path atomically:YES];
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然后我用这种方式读取文件:
NSString *stringPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//NSString* FinalPath = [documentsDirectory stringByAppendingPathComponent: @"Images/"];
NSArray *filePathsArray = [[NSFileManager defaultManager] subpathsOfDirectoryAtPath:documentsDirectory error:&error];
for(int i=0;i<[filePathsArray count];i++)
{
NSString *strFilePath = [filePathsArray objectAtIndex:i];
if ([[strFilePath pathExtension] isEqualToString:@"jpg"] || [[strFilePath pathExtension] …Run Code Online (Sandbox Code Playgroud) 我认为应该有一个简单的解决方案,但我无法弄清楚。我想要做的是通过其路径(未在屏幕上呈现)获取图像的宽度/高度。
喜欢:
var img = ImageInfo(path);
alert(img.width);
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(我想用普通的 javascript 来做这个)
objective-c ×6
c ×2
ios ×2
selector ×2
animation ×1
background ×1
colors ×1
datetime ×1
javascript ×1
nsstring ×1
uicolor ×1
unix ×1