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Information-Centric Networking (ICN) focuses on content retrieval by replacing host-based addressing with content-based addressing. However, in MANETs, content retrieval is faced with significant challenges for nodes' high mobility. Information-Centric MANETs (ICMs) are expected to provide benefits, and there are great significance and challenges for realistically modeling content retrieval in ICMs. In this paper, we design an analytical model of content retrieval for ICMs in 1-dimensional case, which considers the nodes mobility, natures of wireless environment and caching in-networking features in ICN. Our model extracts many considerations in a pervasive methodology composed of three basic objects: locations, nodes, and contents. And closed-form expressions for throughput and delay are derived based on the hit/miss probabilities at the mobile nodes. Several simulation experiments are conducted to check the reliability of proposed model. Overall, the results show that this model can be chosen to guide further research and evaluation of optimized ICMs in the future.