Collapse sequences of white space into a single character and trim string(将空格序列折叠成单个字符并修剪字符串)

How to compare two NSDates: Which is more recent?(如何比较两个 NSDate:哪个是最近的?)

In Objective-C why should I check if self = [super init] is not nil?(在 Objective-C 中，我为什么要检查 self = [super init] 是否不为零?)

MKMapView: Instead of Annotation Pin, a custom view(MKMapView:自定义视图代替 Annotation Pin)

symbol(s) not found for architecture i386(未找到体系结构 i386 的符号)

What are best practices that you use when writing Objective-C and Cocoa?(您在编写 Objective-C 和 Cocoa 时使用了哪些最佳实践?)

NSURLSession with NSBlockOperation and queues(带有 NSBlockOperation 和队列的 NSURLSession)

What do the plus and minus signs mean in Objective-C next to a method?(Objective-C中方法旁边的加号和减号是什么意思?)

iPhone app in landscape mode, 2008 systems(横向模式下的 iPhone 应用程序，2008 系统)

Why use weak pointer for delegation?(为什么使用弱指针进行委托?)

Any way to bold part of a NSString?(有什么方法可以加粗 NSString 的一部分?)

Calculating the number of days between two dates in Objective-C(在 Objective-C 中计算两个日期之间的天数)

NSArray from NSCharacterSet(NSCharacterSet 中的 NSArray)

Retain cycle on `self` with blocks(使用块在“self上保留循环)

Resizing UITableView to fit content(调整 UITableView 的大小以适应内容)

How to compare two dates in Objective-C(如何在 Objective-C 中比较两个日期)

How can I do Key Value Observing and get a KVO callback on a UIView#39;s frame?(如何进行键值观察并在 UIView 的框架上获取 KVO 回调?)

What does the @ symbol represent in objective-c?(在objective-c中@符号代表什么?)

How do I get the day of the week with Foundation?(我如何通过 Foundation 获取星期几?)

setValue:forUndefinedKey: this class is not key value coding-compliant for the key(setValue:forUndefinedKey: 这个类不符合键的键值编码)