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xcode object-c 笔记

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/* 
1. IBOutlet   inte易做图ce builder  为了使用 inte易做图ce builder 识别 
*/ 
@property (nonatimic, retain) IBOutlet UIImageView *imageview; 
 
/* 
2. 载入新的视图view 
*/ 
FlipsideVC *VC = [[FlipsideVC alloc] initWithNibName:@"NIB名字" bundle:nil]; 
[self.navigationController pushViewController:vc animated:YES]; 
[vc release]; 
 
/* 
3.载入网络图片 
*/ 
NSString *imageurl = @"http://****/1.jpg"; 
NSError *error = nil; 
NSURL *url = [NSURL URLWithString:imageurl]; 
NSData *imageData = [[NSData alloc] initWithContentsOfURL:url options:NSMappedRead error:&error]; 
UIImage *picimage  = [[UIImage alloc] initWithData:imageData]; 
[imagedata release]; 
 
/* 
4.动态添加button,自定义的图片按钮 
*/ 
UIButton *closeButton = [[UIButton alloc] initWithFrame: CGRectMake(278, -30, 60, 60)]; 
 
[closeButton setBackgroundColor:[UIColor clearColor]]; 
 
[closeButton setImage:[UIImage imageNamed:@"ad_close_x.png"] forState:UIControlStateNormal]; 
 
[closeButton addTarget:self action:@selector(OnCloseAdButtonPressed:)  
                forControlEvents:UIControlEventTouchUpInside]; 
 
[adView addSubview:closeButton]; 
 
/* 
5.NSAutoreleasePool  自动释放 
*/ 
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; 
.... 
[pool release]; 
 
 
/* 
6. NSLog  日志 
*/ 
NSLog(@"aaaaaaaaaaa"); 
 
/* 
7.  使用NSLocalizedString实现国际化 
*/ 
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];  
NSArray *languages = [defaults objectForKey:@"AppleLanguages"];  
NSLog(@"%@", languages); 
 
/* 
8   在Xcode中建立多语言文档 
*/ 
 
/* 
1.在Resources分类下新建文档(右鍵/Add/New File…) 
2.在模板对话框中选择Other,然后再选择Strings File 
3.将文件保存名设置为Localizable.strings 
4.在Localizable.strings 文件上按右键并选择 Get Info 
5.点击信息界面的Make File Localizable,然后再将Tab标签切换到General 
6.输入新的语言名称 zh 後按 Add,些时有English与zh两种语言,你还可以增加其它语言. 
 
在源代码中使用NSLocalizedString来引用国际化文件 
 
//括号里第一个参数是要显示的内容,与各Localizable.strings中的id对应 
//第二个是对第一个参数的注释,一般可以为空串 
[_alertView setTitle:NSLocalizedString(@"Submitted successfully",@"")]; 
 
 
四、使用Terminal的genstrings命令进行生成资源文件 
打开Terminal,然后cd到工程所在的目录,然后使用genstrings来生成自动从源代码中生成资源文件. 
例如,项目的目录为:/user/project/test01,则命令如下: 
 
genstrings -o English.lproj  ./classes/*.m 
genstrings -o zh.lproj  ./classes/*.m 
 
 
五、编辑各Localizable.strings文件 
从第四步中得到了与代码对应的资源文件,最后我们需要对这些资源文件翻译成对应的语言就可以了.如在Localizable.strings(zh)中, 把等号后的文字进行编译成中文. 
 
"Submitted successfully" = "提交成功" 
重新编译整个工程后,就会在不同的语言环境下得 
*/ 
 
 
/* 
9.  NSString and NSMutableString 
*/ 
use @"abc" to mean NSString 
ex: NSString *str = @"Hello"; 
use content of file to create NSString 
ex: NSString *str = [NSString stringWithContentsOfFile:@"/path/to/file"] 
use c characters to create NSString 
ex: char *cStr="hello"; 
NSString *str = [NSString stringWithCString: cStr] 
get length of NSString 
ex: unsigned int strLen = [str length] 
append on NSString to another 
ex: NSString *str = @"Hello"; 
NSString *str2 = [str stringByAppendingString: @"abc"] 
append a format: 
ex: NSString *str3 = [str2 stringByAppendingFormat: @"%d", 2003] 
search for subString: 
ex: NSRange loc = [str rangeOfString:@"The"] 
what is NSRange: 
typedef struct _NSRange{ 
unsigned int location; 
unsigned int length; 
}NSRange; 
breaking a string into components: 
ex: NSArray *fields = [str componentsSeperatedByString:@"abc"]; 
create NSMutableString from NSString: 
ex: NSString *str = @"hello"; 
NSMutableString *ms = [NSMutableString stringWithString: str];  
 
/* 
10. NSString+NSMutableString+NSValue+NSAraay用法汇总 
*/ 
    /*----------------创建字符串的方法----------------*/ 
    //1、创建常量字符串。 
    NSString *astring = @"This is a String!"; 
    //2、创建空字符串,给予赋值。 
    NSString *astring = [[NSString alloc] init]; 
    astring = @"This is a String!"; 
    NSLog(@"astring:%@",astring); 
  [astring release]; 
    //3、在以上方法中,提升速度:initWithString方法 
    NSString *astring = [[NSString alloc] initWithString:@"This is a String!"]; 
    NSLog(@"astring:%@",astring); 
    [astring release]; 
    //4、用标准c创建字符串:initWithCString方法 
    char *Cstring = "This is a String!"; 
    NSString *astring = [[NSString alloc] initWithCString:Cstring]; 
    NSLog(@"astring:%@",astring); 
    [astring release]; 
    //5、创建格式化字符串:占位符(由一个%加一个字符组成) 
    int i = 1; 
    int j = 2; 
    NSString *astring = [[NSString alloc] initWithString:[NSString stringWithFormat:@"%d.This is %i string!",i,j]]; 
    NSLog(@"astring:%@",astring); 
    [astring release]; 
    //6、创建临时字符串 
    NSString *astring; 
    astring = [NSString stringWithCString:"This is a temporary string"]; 
    NSLog(@"astring:%@",astring); 
    /*----------------从文件读取字符串:initWithContentsOfFile方法 ----------------*/    
    NSString *path = @"astring.text"; 
    NSString *astring = [[NSString alloc] initWithContentsOfFile:path]; 
    NSLog(@"astring:%@",astring); 
    [astring release]; 
    /*----------------写字符串到文件:writeToFile方法 ----------------*/    
 
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