objective-c - 如何使用 Xcode 将属性列表文件键的值读入 iphone 应用程序的字符串

Question

我有一个属性列表文件“someFile.plist”，在 plist 中有两行“row1”和“row2”，每行都有一个字符串值，即“Y”或“N”——如果我想检查“someFile” “row2”的.plist”文件以获取该行的值并将其读入目标c中的字符串，我该怎么做？我正在使用 Xcode 为 iphone App 编写代码。

Answer 1

加载.plist到NSDictionarylike中：

NSString *path = [[NSBundle mainBundle] pathForResource:@"filename" ofType:@"plist"];
NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path];

循环NSDictionary使用类似的东西：

for (id key in dictionary) {
    NSLog(@"key: %@, value: %@", key, [dictionary objectForKey:key]);
}

Answer 2

如果您想将“row2”的值获取到 String，那么这取决于您是具有 Dictionary 类型还是 Array 类型。在字典类型的情况下：

NSString *path = [[NSBundle mainBundle] pathForResource:@"pListFileName" ofType:@"plist"];
NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path];
NSString valueOfRow2 = [dict objectForKey:@"row2"]);
NSLog(@"The value of row2 is %@", valueOfRow2);

在数组的情况下：

NSString *path = [[NSBundle mainBundle] pathForResource:@"pListFileName" ofType:@"plist"];
NSArray *array = [NSArray arrayWithContentsOfFile: path];
//the indexes of NSArray is counted from 0, not from 1
NSString valueOfRow2 = [array objectAtIndex:1];
NSLog(@"The value of row2 is %@", valueOfRow2);

您可以分别使用 NSMutableDictionary 和 NSMutableArray。修改它们会更容易。

Answer 3

对于 Swift 3.0：

if let path = Bundle.main.path(forResource: "YourPlistFile", ofType: "plist"), let dict = NSDictionary(contentsOfFile: path) as? [String: AnyObject] {
            let value = dict["KeyInYourPlistFile"] as! String
    }