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In tutorials it's written that functionally both are same even closure is more easier then block and its avoided the complexity of block and memory management, I've gone through many tutorials but except these I'm not getting the difference between swift's "closure" and Objective-C "block".
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Swift is a general-purpose, high-level programming language which is highly concerned about safety, performance. Objective C is an general purpose language which is considered as superset of C language it was designed in an aim of providing object-oriented capabilities.
Difference between Function and Closure Function is declared using func keyword whereas Closure doesn't have func keyword. Function has always name but Closure doesn't have. Function doesn't have in keyword but closure has in the keyword.
In Swift, a closure is a special type of function without the function name. For example, { print("Hello World") } Here, we have created a closure that prints Hello World .
Closures in Swift are similar to blocks in C and Objective-C and to lambdas in other programming languages. Closures can capture and store references to any constants and variables from the context in which they're defined. This is known as closing over those constants and variables.
Excerpt From: Apple Inc. “Using Swift with Cocoa and Objective-C.” iBooks:
“Swift closures and Objective-C blocks are compatible, so you can pass Swift closures to Objective-C methods that expect blocks. Swift closures and functions have the same type, so you can even pass the name of a Swift function.
Closures have similar capture semantics as blocks but differ in one key way: Variables are mutable rather than copied. In other words, the behavior of __block in Objective-C is the default behavior for variables in Swift.”
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