iOS基礎：NSBundle

原創

江湖hi客

2020-02-22 10:38

一、bundle

bundle是一個目錄,其中包含了程序會使用到的資源.這些資源包含了如圖像,聲音,編譯好的代碼,nib文件(用戶也會把bundle稱爲plug-in).對應bundle,cocoa提供了類NSBundle.

二、使用

工程中的目錄結構

1、通過bundle獲取資源路徑或Url

//通過bundle獲取資源路徑
-(void)getPath{
    NSBundle * mainBundle = [NSBundle mainBundle];
    
    //1
    //獲取圖片路徑
    NSString * myTestPngPath = [mainBundle pathForResource:@"MyTest" ofType:@"png"];
    NSLog(@"myTestPath = %@",myTestPngPath);
    //獲取plist文件路徑
    NSString * myTestPlistPath = [mainBundle pathForResource:@"MyTest" ofType:@"plist"];
    NSLog(@"myTestPlistPath = %@",myTestPlistPath);
    //獲取MP3路徑
    NSString * myTestMp3Path = [mainBundle pathForResource:@"MyTest" ofType:@"mp3"];
    NSLog(@"myTestMp3Path = %@",myTestMp3Path);
    
    //2
    //邏輯路徑下的文件可以直接使用文件名
    NSString * myTestGroupPath = [mainBundle pathForResource:@"MyTestGroup" ofType:@"plist"];
    NSLog(@"myTestGroupPath = %@",myTestGroupPath);
    //物理路徑下的文件需要補全路徑才能獲得
    NSString * myTestFolderPath = [mainBundle pathForResource:@"folder/MyTestFolder" ofType:@"plist"];
    NSLog(@"myTestFolderPath = %@",myTestFolderPath);
    
    //3
    //可以將路徑轉爲url使用
    NSURL * url = [NSURL fileURLWithPath:myTestPngPath];
    //相當於
    NSURL * url1 = [mainBundle URLForResource:@"MyTest" withExtension:@"png" ];
}

2、通過bundle獲取plist文件內容

//獲取*.plist文件及內容
- (void)getPlist {
   
    //獲取plist文件信息
    NSBundle * bundle = [NSBundle mainBundle];
    
    //獲取info.plist內容
    NSURL * infoUrl = [bundle URLForResource:@"Info.plist" withExtension:nil];
    NSDictionary * infoDict = [NSDictionary dictionaryWithContentsOfURL:infoUrl];
    NSArray * infoKeys = [infoDict allKeys];
    //PS:拿到了字典就可以拿到plist文件中的內容
    NSLog(@"infoDict = %@",infoDict);
    NSLog(@"infoKeys = %@",infoKeys);
    
    
    //獲取MyTest.plist內容
    NSURL * myTestUrl = [bundle URLForResource:@"MyTest.plist" withExtension:nil];
    NSDictionary * myTesDict = [NSDictionary dictionaryWithContentsOfURL:myTestUrl];
    NSArray * myTestKeys = [myTesDict allKeys];
    NSLog(@"myTesDict = %@",myTesDict);
    NSLog(@"myTestKeys = %@",myTestKeys);
    
    //獲取MyTestGroup.plist內容
    NSURL * myTestGroupUrl = [bundle URLForResource:@"MyTestGroup.plist" withExtension:nil];
    NSDictionary * myTesGroupDict = [NSDictionary dictionaryWithContentsOfURL:myTestGroupUrl];
    NSArray * myTestGroupKeys = [myTesGroupDict allKeys];
    NSLog(@"myTesGroupDict = %@",myTesGroupDict);
    NSLog(@"myTestGroupKeys = %@",myTestGroupKeys);
    
    //獲取MyTestFolder內容
    NSURL * myTestFolderUrl = [bundle URLForResource:@"folder/MyTestFolder.plist" withExtension:nil];
    NSDictionary * myTesFolderDict = [NSDictionary dictionaryWithContentsOfURL:myTestFolderUrl];
    NSArray * myTestFolderKeys = [myTesFolderDict allKeys];
    NSLog(@"myTesFolderDict = %@",myTesFolderDict);
    NSLog(@"myTestFolderKeys = %@",myTestFolderKeys);
}

獲取info.plist內容還有一種方法

//獲取Info.plist文件及內容
-(void)getInfoPlist{
    //拿到主bundle
    NSBundle * bundle = [NSBundle mainBundle];
#if 0
    
    NSString * str = [bundle objectForInfoDictionaryKey:@"CFBundleIdentifier"];
    NSLog(@"str = %@",str);
    
#elif 1
    
    NSDictionary * infoDic = bundle.infoDictionary;
    NSString * str1 = infoDic[@"CFBundleIdentifier"];
    NSLog(@"str1 = %@",str1);
    // 獲取字典裏的所有key
    NSArray * keys = [infoDic allKeys];
    
#endif
    NSLog(@"infoDic = %@",infoDic);
    NSLog(@"keys = %@",keys);
    NSLog(@"keysCount = %lu",(unsigned long)keys.count);
   
    
}

3、獲取nib文件

//獲取nib文件
-(void)getNib{
    NSBundle * mainBundle = [NSBundle mainBundle];
    
    NSArray *nibs=[mainBundle loadNibNamed:@"MyTest" owner:self options:nil];
    NSLog(@"nibs = %@",nibs);
    
    UIView * view = nibs[0];
    NSArray * subViews = view.subviews;
    NSLog(@"subViews = %@",subViews);
}