iOS NSString判断两个字符串是否相等,NSString判断两个字符串是否相等,NSString isEqualToString, isEqualToString,猿说编程,

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iOS NSString匹配字符串开头,NSString匹配字符串开头, hasPrefix,NSString hasPrefix,猿说编程,

iOS NSString获取指定下标字符,NSString获取指定下标字符,NSString substringWithRange,NSString characterAtIndex,

iOS NSString判断字符串是否为空判,NSString字符串是否为空判,NSString空字符串,NSString isEqual,

iOS NSString获取字符串长度,NSString获取字符串长度,NSString lengthOfBytesUsingEncoding, NSString length,NSString计算中文长度,

Xcode - Your maximum App ID limit has been reached. You may create up to 10 App IDs every 7 days - 1.出现这种情况,直接用上一次的 Bundle ID 就行了,因为免费 App ID 账号苹果官方有所限...

Xcode - Embedded binary's bundle identifier is not prefixed with the parent app's bundle identifier - 如果是直接从网上下载的工程，首先检查工程 TARGETS 下的 Bundle Identifier 是否已...

Xcode - This app has attempted to access privacy-sensitive data without a usage description.

iOS NSString 和 bool 相互转换 NSString *str1 = @'YES'; NSString *str2 = @'NO'; //ok NSLog(@'str1 = %d str2 = %d',[str1 boolValue],[str2 boolValue]); BOOL a = YES; BOOL b = NO; NSSt...