我知道可以通过预处理 Info.plist 文件将变量存储在默认的 Info.plist 文件中。我想知道是否可以使用自定义 plist 文件做类似的事情。
我通过以下代码加载 plist 文件:
NSString *path = [[NSBundle mainBundle] bundlePath];
NSString *customPlistPath = [path stringByAppendingPathComponent"custom.plist"];
NSDictionary *plistData = [NSDictionary dictionaryWithContentsOfFile:customPlistPath];
是否可以输入 ${PRODUCT_NAME} 或 ${MY_OWN_VARIABLE_NAME} 之类的值,并在我读入自定义 plist 文件后对其进行处理?目前,当我将自定义 plist 文件读入 NSDictionary 时,变量值没有被替换
Best Answer-推荐答案 strong>
Cocoa Touch 框架中没有内置任何东西可以为您执行此操作。您必须编写自己的代码来在运行时处理这些值。我已经为我自己的应用程序做了这个。我在实用程序类中使用了这两种方法。
+ (NSString *)processVariablesNSString *)string {
if (string.length == 0) {
return string;
}
NSRange range = [string rangeOfString"${" options:NSLiteralSearch];
if (range.location != NSNotFound) {
NSMutableString *res = [string mutableCopy];
do {
NSRange close = [res rangeOfString"}" options:NSLiteralSearch];
if (close.location == NSNotFound) {
break; // Uh-oh - bad
}
NSRange rngVar = NSMakeRange(range.location, close.location - range.location + 1);
NSString *var = [res substringWithRange:NSMakeRange(rngVar.location + 2, rngVar.length - 3)];
NSString *val = [variables objectForKey:var];
if (val) {
[res replaceCharactersInRange:rngVar withString:val];
} else {
[res replaceCharactersInRange:rngVar withString:var];
}
range = [res rangeOfString"${" options:NSLiteralSearch];
} while (range.location != NSNotFound);
return res;
} else {
return string;
}
}
+ (id)expandPlistVariablesid)root {
if ([root isKindOfClass:[NSArray class]]) {
NSArray *array = (NSArray *)root;
NSMutableArray *res = [[NSMutableArray alloc] initWithCapacity:array.count];
for (id obj in array) {
if ([obj isKindOfClass:[NSString class]]) {
[res addObject:[self processVariablesNSString *)obj]];
} else {
id newObj = [self expandPlistVariablesbj];
[res addObject:newObj];
}
}
return res;
} else if ([root isKindOfClass:[NSDictionary class]]) {
NSDictionary *dict = (NSDictionary *)root;
NSMutableDictionary *res = [[NSMutableDictionary alloc] initWithCapacity:dict.count];
for (NSString *key in [dict allKeys]) {
id obj = dict[key];
if ([obj isKindOfClass:[NSString class]]) {
res[key] = [self processVariablesNSString *)obj];
} else {
id newObj = [self expandPlistVariablesbj];
res[key] = newObj;
}
}
return res;
} else {
// oops
return root;
}
}
您将传入从 plist 加载的字典(或数组)并返回一个新字典(或数组),其中包含变量引用的所有字符串值都已更新。
NSString *path = [[NSBundle mainBundle] bundlePath];
NSString *customPlistPath = [path stringByAppendingPathComponent"custom.plist"];
NSDictionary *plistData = [NSDictionary dictionaryWithContentsOfFile:customPlistPath];
plistData = [UtilityClass expandPlistVariables:plistData];
在代码中,variables 是一个包含变量值的NSDictionary 。此字典中的键是您的 plist 中 ${ 和 } 之间的值。示例:
variables = @{ @"RODUCT_NAME" : @"MyProduct", @"MY_OWN_VARIABLE_NAME" : @"Some Value" };
关于ios - 自定义 plist 文件中的变量,我们在Stack Overflow上找到一个类似的问题:
https://stackoverflow.com/questions/18708278/
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